diff --git a/.editorconfig b/.editorconfig new file mode 100644 index 0000000..b4d9ec4 --- /dev/null +++ b/.editorconfig @@ -0,0 +1,3 @@ +[*.sh] +indent_style = tab +indent_size = 4 diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml new file mode 100644 index 0000000..d5689d8 --- /dev/null +++ b/.github/FUNDING.yml @@ -0,0 +1,3 @@ +patreon: stanislas +liberapay: stanislas +ko_fi: stanislas diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md deleted file mode 100644 index 3e0a5a3..0000000 --- a/.github/ISSUE_TEMPLATE.md +++ /dev/null @@ -1,10 +0,0 @@ - diff --git a/.github/ISSUE_TEMPLATE/bug-report-or-suport-request.md b/.github/ISSUE_TEMPLATE/bug-report-or-suport-request.md new file mode 100644 index 0000000..f59acf9 --- /dev/null +++ b/.github/ISSUE_TEMPLATE/bug-report-or-suport-request.md @@ -0,0 +1,49 @@ +--- +name: Bug report / Support request +about: Create a report to help us improve +title: '' +labels: '' +assignees: '' + +--- + +**Checklist** + +- [ ] I read the [README](https://github.com/angristan/openvpn-install/blob/master/README.md) +- [ ] I read the [FAQ](https://github.com/angristan/openvpn-install/blob/master/FAQ.md) +- [ ] I searched the [issues](https://github.com/angristan/openvpn-install/issues?q=is%3Aissue+) +- [ ] My issue is about the script, and not OpenVPN itself + + + +**Describe the issue** +A clear and concise description of what the bug is. + +**To Reproduce** +Steps to reproduce the behavior: + +1. ... + +**Expected behavior** +A clear and concise description of what you expected to happen. + +**Logs** +If applicable, add logs or screenshots to help explain your problem. + +If you can reproduce the issue, please run the script in debug mode and post the output: `bash -x openvpn-install.sh` + +**Server if applicable):** + +- OS: [e.g. Debian 10] +- Hosting provider (if applicable): [e.g. Vultr, AWS] + +**Client (if applicable):** + +- Device: [e.g. iPhone6] +- OS: [e.g. iOS8.1] +- Client: [e.g. OpenVPN Connect] + +**Additional context** +Add any other context about the problem here. diff --git a/.github/ISSUE_TEMPLATE/feature-request.md b/.github/ISSUE_TEMPLATE/feature-request.md new file mode 100644 index 0000000..e5dd037 --- /dev/null +++ b/.github/ISSUE_TEMPLATE/feature-request.md @@ -0,0 +1,31 @@ +--- +name: Feature request +about: Suggest an idea for this project +title: '' +labels: '' +assignees: '' + +--- + +**Checklist** + +- [ ] I read the [README](https://github.com/angristan/openvpn-install/blob/master/README.md) +- [ ] I read the [FAQ](https://github.com/angristan/openvpn-install/blob/master/FAQ.md) +- [ ] I searched the [issues](https://github.com/angristan/openvpn-install/issues?q=is%3Aissue+) +- [ ] My issue is about the script, and not OpenVPN itself + + + +**Is your feature request related to a problem? Please describe.** +A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] + +**Describe the solution you'd like** +A clear and concise description of what you want to happen. + +**Describe alternatives you've considered** +A clear and concise description of any alternative solutions or features you've considered. + +**Additional context** +Add any other context or screenshots about the feature request here. diff --git a/.github/dependabot.yml b/.github/dependabot.yml new file mode 100644 index 0000000..f4d737f --- /dev/null +++ b/.github/dependabot.yml @@ -0,0 +1,10 @@ +version: 2 +updates: + - package-ecosystem: "github-actions" + directory: "/" + schedule: + interval: "daily" + assignees: + - "angristan" + reviewers: + - "angristan" diff --git a/.github/linters/.markdown-lint.yml b/.github/linters/.markdown-lint.yml new file mode 100644 index 0000000..68d1fdf --- /dev/null +++ b/.github/linters/.markdown-lint.yml @@ -0,0 +1 @@ +{ 'MD013': null, 'MD045': null, 'MD040': null, 'MD036': null } diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml new file mode 100644 index 0000000..b751d16 --- /dev/null +++ b/.github/workflows/lint.yml @@ -0,0 +1,14 @@ +on: [push, pull_request, pull_request_target] + +name: Lint + +jobs: + super-linter: + runs-on: ubuntu-latest + steps: + - name: Checkout Code + uses: actions/checkout@v2 + - name: Lint Code Base + uses: github/super-linter@v3.13.2 + env: + GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml new file mode 100644 index 0000000..2353c32 --- /dev/null +++ b/.github/workflows/test.yml @@ -0,0 +1,97 @@ +on: + push: + branches: + - master + +name: Test +jobs: + install: + runs-on: ubuntu-latest + if: github.repository == 'angristan/openvpn-install' && github.actor == 'angristan' + strategy: + matrix: + os-image: + - debian-9-x64 + - debian-10-x64 + - ubuntu-18-04-x64 + - ubuntu-16-04-x64 + - ubuntu-20-04-x64 + - fedora-31-x64 + - fedora-32-x64 + - centos-7-x64 + - centos-8-x64 + steps: + - uses: actions/checkout@v2 + + - name: Setup doctl + uses: digitalocean/action-doctl@v2 + with: + token: ${{ secrets.DIGITALOCEAN_ACCESS_TOKEN }} + + - name: Create server + run: doctl compute droplet create openvpn-action-$GITHUB_RUN_ID-$GITHUB_RUN_NUMBER-${{ matrix.os-image }} --size s-1vcpu-1gb --image ${{ matrix.os-image }} --region lon1 --enable-ipv6 --ssh-keys be:66:76:61:a8:71:93:aa:e3:19:ba:d8:0d:d2:2d:d4 --wait + + - name: Get server ID + run: echo ::set-output name=value::$(doctl compute droplet list -o json | jq -r '.[] | select(.name == "'openvpn-action-$GITHUB_RUN_ID-$GITHUB_RUN_NUMBER-${{ matrix.os-image }}'").id') + id: server_id + + - name: Move server to dedicated project + run: doctl projects resources assign ${{ secrets.DIGITALOCEAN_PROJECT_ID }} --resource=do:droplet:${{ steps.server_id.outputs.value }} + + - name: Wait for server to boot + run: sleep 90 + + - name: Get server IP + run: echo ::set-output name=value::$(doctl compute droplet list -o json | jq -r '.[] | select(.name == "'openvpn-action-$GITHUB_RUN_ID-$GITHUB_RUN_NUMBER-${{ matrix.os-image }}'").networks.v4 | .[] | select(.type == "'public'").ip_address') + id: server_ip + + - name: Get server OS + run: echo ::set-output name=value::$(echo ${{ matrix.os-image }} | cut -d '-' -f1) + id: server_os + + - name: Setup remote server (Debian/Ubuntu) + if: steps.server_os.outputs.value == 'debian' || steps.server_os.outputs.value == 'ubuntu' + uses: appleboy/ssh-action@v0.1.3 + with: + host: ${{ steps.server_ip.outputs.value }} + username: root + key: ${{ secrets.SSH_KEY }} + script: set -x && apt-get update && apt-get install -y git + + - name: Setup remote server (Fedora) + if: steps.server_os.outputs.value == 'fedora' + uses: appleboy/ssh-action@v0.1.3 + with: + host: ${{ steps.server_ip.outputs.value }} + username: root + key: ${{ secrets.SSH_KEY }} + script: set -x && dnf install -y git + + - name: Setup remote server (CentOS) + if: steps.server_os.outputs.value == 'centos' + uses: appleboy/ssh-action@v0.1.3 + with: + host: ${{ steps.server_ip.outputs.value }} + username: root + key: ${{ secrets.SSH_KEY }} + script: set -x && yum install -y git + + - name: Download repo and checkout current commit + uses: appleboy/ssh-action@v0.1.3 + with: + host: ${{ steps.server_ip.outputs.value }} + username: root + key: ${{ secrets.SSH_KEY }} + script: set -x && git clone https://github.com/angristan/openvpn-install.git && cd openvpn-install && git checkout ${{ github.event.pull_request.head.sha }} + + - name: Run openvpn-install.sh in headless mode + uses: appleboy/ssh-action@v0.1.3 + with: + host: ${{ steps.server_ip.outputs.value }} + username: root + key: ${{ secrets.SSH_KEY }} + script: 'set -x && AUTO_INSTALL=y bash -x ~/openvpn-install/openvpn-install.sh && ps aux | grep openvpn | grep -v grep > /dev/null 2>&1 && echo "Success: OpenVPN is running" && exit 0 || echo "Failure: OpenVPN is not running" && exit 1' + + - name: Delete server + run: doctl compute droplet delete -f openvpn-action-$GITHUB_RUN_ID-$GITHUB_RUN_NUMBER-${{ matrix.os-image }} + if: always() diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml deleted file mode 100644 index 6961880..0000000 --- a/.gitlab-ci.yml +++ /dev/null @@ -1,11 +0,0 @@ -image: debian:buster-slim - -stages: - - Bash linting - -shellcheck: - stage: Bash linting - script: - - apt-get update - - apt-get install -y shellcheck - - shellcheck -e SC1091,SC2164,SC2034,SC1072,SC1073,SC1009 openvpn-install.sh diff --git a/FAQ.md b/FAQ.md new file mode 100644 index 0000000..ee0e51a --- /dev/null +++ b/FAQ.md @@ -0,0 +1,145 @@ +# FAQ + +**Q:** The script has been updated since I installed OpenVPN. How do I update? + +**A:** You can't. Managing updates and new features from the script would require way too much work. Your only solution is to uninstall OpenVPN and reinstall with the updated script. + +You can, of course, it's even recommended, update the `openvpn` package with your package manager. + +--- + +**Q:** How do I check for DNS leaks? + +**A:** Go to [browserleaks.com](https://browserleaks.com/dns) or [ipleak.net](https://ipleak.net/) (both perform IPv4 and IPv6 check) with your browser. Only your server's IP should show up. + +--- + +**Q:** How do I fix DNS leaks? + +**A:** On Windows 10 DNS leaks are blocked by default with the `block-outside-dns` option. +On Linux you need to add these lines to your `.ovpn` file based on your Distribution. + +Debian 9, 10 and Ubuntu 16.04, 18.04 + +``` +script-security 2 +up /etc/openvpn/update-resolv-conf +down /etc/openvpn/update-resolv-conf +``` + +Centos 6, 7 + +``` +script-security 2 +up /usr/share/doc/openvpn-2.4.8/contrib/pull-resolv-conf/client.up +down /usr/share/doc/openvpn-2.4.8/contrib/pull-resolv-conf/client.down +``` + +Centos 8, Fedora 30, 31 + +``` +script-security 2 +up /usr/share/doc/openvpn/contrib/pull-resolv-conf/client.up +down /usr/share/doc/openvpn/contrib/pull-resolv-conf/client.down +``` + +Arch Linux + +``` +script-security 2 +up /usr/share/openvpn/contrib/pull-resolv-conf/client.up +down /usr/share/openvpn/contrib/pull-resolv-conf/client.down +``` + +--- + +**Q:** Can I use an OpenVPN 2.3 client? + +**A:** Yes. I really recommend using an up-to-date client, but if you really need it, choose the following options: + +- No compression or LZ0 +- RSA certificate +- DH Key +- AES CBC +- tls-auth + +If your client is <2.3.3, remove `tls-version-min 1.2` from your `/etc/openvpn/server.conf` and `.ovpn` files. + +--- + +**Q:** IPv6 is not working on my Hetzner VM + +**A:** This an issue on their side. See + +--- + +**Q:** DNS is not working on my Linux client + +**A:** See "How do I fix DNS leaks?" question + +--- + +**Q:** What syctl and iptables changes are made by the script? + +**A:** Iptables rules are saved at `/etc/iptables/add-openvpn-rules.sh` and `/etc/iptables/rm-openvpn-rules.sh`. They are managed by the service `/etc/systemd/system/iptables-openvpn.service` + +Sysctl options are at `/etc/sysctl.d/20-openvpn.conf` + +--- + +**Q:** How can I access other clients connected to the same OpenVPN server? + +**A:** Add `client-to-client` to your `server.conf` + +--- + +**Q:** My router can't connect + +**A:** + +- `Options error: No closing quotation (") in config.ovpn:46` : + + type `yes` when asked to customize encryption settings and choose `tls-auth` + +- `Options error: Unrecognized option or missing parameter(s) in config.ovpn:36: tls-version-min (2.3.2)` : + + see question "Can I use an OpenVPN 2.3 client?" + +--- + +**Q:** How can I access computers the OpenVPN server's remote LAN? + +**A:** Add a route with the subnet of the remote network to `/etc/openvpn/server.conf` and restart openvpn. Example: `push "route 192.168.1.0 255.255.255.0"` if the server's LAN is `192.168.1.0/24` + +--- + +**Q:** How can I add multiple users in one go? + +**A:** Here is a sample bash script to achieve this: + +```sh +userlist=(user1 user2 user3) + +for i in ${userlist[@]};do + MENU_OPTION=1 CLIENT=$i PASS=1 ./openvpn-install.sh +done +``` + +--- + +**Q:** How do I change the default `.ovpn` file created for future clients? + +**A:** You can edit the template out of which `.ovpn` files are created by editing `/etc/openvpn/client-template.txt` + +--- + +**Q:** For my clients - I want to set my internal network to pass through the VPN and the rest to go through my internet? + +**A:** You would need to edit the `.ovpn` file. You can edit the template out of which those files are created by editing `/etc/openvpn/client-template.txt` file and adding + +```sh +route-nopull +route 10.0.0.0 255.0.0.0 +``` + +So for example - here it would route all traffic of `10.0.0.0/8` to the vpn. And the rest through the internet. diff --git a/LICENSE b/LICENSE index 1727729..af58bae 100644 --- a/LICENSE +++ b/LICENSE @@ -1,7 +1,7 @@ MIT License Copyright (c) 2013 Nyr -Copyright (c) 2016 Angristan (Stanislas Lange) +Copyright (c) 2016 Stanislas Lange (angristan) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in diff --git a/README.md b/README.md index 78c1a6d..d9ba9be 100644 --- a/README.md +++ b/README.md @@ -1,21 +1,25 @@ # openvpn-install -[![GitLab CI](https://gitlab.com/angristan/openvpn-install/badges/master/pipeline.svg)](https://gitlab.com/angristan/openvpn-install/pipelines) +![Test](https://github.com/angristan/openvpn-install/workflows/Test/badge.svg) +![Lint](https://github.com/angristan/openvpn-install/workflows/Lint/badge.svg) +![visitors](https://visitor-badge.glitch.me/badge?page_id=angristan.openvpn-install) OpenVPN installer for Debian, Ubuntu, Fedora, CentOS and Arch Linux. This script will let you setup your own secure VPN server in just a few seconds. +You can also check out [wireguard-install](https://github.com/angristan/wireguard-install), a simple installer for a simpler, safer, faster and more modern VPN protocol. + ## Usage -First, get the script and make it executable : +First, get the script and make it executable: ```bash -curl -O https://raw.githubusercontent.com/Angristan/openvpn-install/master/openvpn-install.sh +curl -O https://raw.githubusercontent.com/angristan/openvpn-install/master/openvpn-install.sh chmod +x openvpn-install.sh ``` -Then run it : +Then run it: ```sh ./openvpn-install.sh @@ -25,7 +29,7 @@ You need to run the script as root and have the TUN module enabled. The first time you run it, you'll have to follow the assistant and answer a few questions to setup your VPN server. -When OpenVPN is installed, you can run the script again, and you will get the choice to : +When OpenVPN is installed, you can run the script again, and you will get the choice to: - Add a client - Remove a client @@ -33,7 +37,61 @@ When OpenVPN is installed, you can run the script again, and you will get the ch In your home directory, you will have `.ovpn` files. These are the client configuration files. Download them from your server and connect using your favorite OpenVPN client. -If you have any question, head to the [FAQ](#faq) first. +If you have any question, head to the [FAQ](#faq) first. Please read everything before opening an issue. + +**PLEASE do not send me emails or private messages asking for help.** The only place to get help is the issues. Other people may be able to help and in the future, other users may also run into the same issue as you. My time is not available for free just for you, you're not special. + +### Headless install + +It's also possible to run the script headless, e.g. without waiting for user input, in an automated manner. + +Example usage: + +```bash +AUTO_INSTALL=y ./openvpn-install.sh + +# or + +export AUTO_INSTALL=y +./openvpn-install.sh +``` + +A default set of variables will then be set, by passing the need for user input. + +If you want to customise your installation, you can export them or specify them on the same line, as shown above. + +- `APPROVE_INSTALL=y` +- `APPROVE_IP=y` +- `IPV6_SUPPORT=n` +- `PORT_CHOICE=1` +- `PROTOCOL_CHOICE=1` +- `DNS=1` +- `COMPRESSION_ENABLED=n` +- `CUSTOMIZE_ENC=n` +- `CLIENT=clientname` +- `PASS=1` + +If the server is behind NAT, you can specify its endpoint with the `ENDPOINT` variable. If the endpoint is the public IP address which it is behind, you can use `ENDPOINT=$(curl -4 ifconfig.co)` (the script will default to this). The endpoint can be an IPv4 or a domain. + +Other variables can be set depending on your choice (encryption, compression). You can search for them in the `installQuestions()` function of the script. + +Password-protected clients are not supported by the headless installation method since user input is expected by Easy-RSA. + +The headless install is more-or-less idempotent, in that it has been made safe to run multiple times with the same parameters, e.g. by a state provisioner like Ansible/Terraform/Salt/Chef/Puppet. It will only install and regenerate the Easy-RSA PKI if it doesn't already exist, and it will only install OpenVPN and other upstream dependencies if OpenVPN isn't already installed. It will recreate all local config and re-generate the client file on each headless run. + +### Headless User Addition + +It's also possible to automate the addition of a new user. Here, the key is to provide the (string) value of the `MENU_OPTION` variable along with the remaining mandatory variables before invoking the script. + +The following Bash script adds a new user `foo` to an existing OpenVPN configuration + +```bash +#!/bin/bash +export MENU_OPTION="1" +export CLIENT="foo" +export PASS="1" +./openvpn-install.sh +``` ## Features @@ -46,7 +104,7 @@ If you have any question, head to the [FAQ](#faq) first. - Choice to use a self-hosted resolver with Unbound (supports already existing Unbound installations) - Choice between TCP and UDP - NATed IPv6 support -- Compression disabled by default to prevent VORACLE. LZ4 and LZ0 algorithms available otherwise. +- Compression disabled by default to prevent VORACLE. LZ4 (v1/v2) and LZ0 algorithms available otherwise. - Unprivileged mode: run as `nobody`/`nogroup` - Block DNS leaks on Windows 10 - Randomised server certificate name @@ -57,16 +115,16 @@ If you have any question, head to the [FAQ](#faq) first. The script supports these OS and architectures: -| | i386 | amd64 | armhf | arm64 | -| ------------ | ---- | ----- | ----- | ----- | -| Arch Linux | ❔ | ✅ | ❔ | ❔ | -| CentOS 7 | ❔ | ✅ | ❌ | ✅ | -| Debian 8 | ✅ | ✅ | ❌ | ❌ | -| Debian 9 | ❌ | ✅ | ✅ | ✅ | -| Fedora 27 | ❔ | ✅ | ❔ | ❔ | -| Fedora 28 | ❔ | ✅ | ❔ | ❔ | -| Ubuntu 16.04 | ✅ | ✅ | ❌ | ❌ | -| Ubuntu 18.04 | ❌ | ✅ | ✅ | ✅ | +| | i386 | amd64 | armhf | arm64 | +| --------------- | ---- | ----- | ----- | ----- | +| Amazon Linux 2 | ❔ | ✅ | ❔ | ❔ | +| Arch Linux | ❔ | ✅ | ❔ | ✅ | +| CentOS 7 | ✅ | ✅ | ✅ | ✅ | +| CentOS 8 | ❌ | ✅ | ❌ | ✅ | +| Debian >= 9 | ✅ | ✅ | ✅ | ✅ | +| Fedora >= 27 | ❔ | ✅ | ❔ | ❔ | +| Ubuntu 16.04 | ✅ | ✅ | ❌ | ❌ | +| Ubuntu >= 18.04 | ✅ | ✅ | ✅ | ✅ | To be noted: @@ -82,17 +140,16 @@ Since 2016, the two scripts have diverged and are not alike anymore, especially ## FAQ -**LOOK AT THE [WIKI](https://github.com/angristan/openvpn-install/wiki/FAQ) FOR MORE INFORMATION. PLEASE READ BOTH BEFORE OPENING AN ISSUE.** - -**PLEASE do net send me emails or private messages asking for help.** The only place to get help is the issues. Other people may be able to help and in the future, other users may also run into the same issue as you. +More Q&A in [FAQ.md](FAQ.md). **Q:** Which provider do you recommend? **A:** I recommend these: -- [Vultr](https://goo.gl/Xyd1Sc): Worldwide locations, IPv6 support, starting at $3.50/month +- [Vultr](https://goo.gl/Xyd1Sc): Worldwide locations, IPv6 support, starting at \$3.50/month +- [Hetzner](https://hetzner.cloud/?ref=ywtlvZsjgeDq): Germany, IPv6, 20 TB of traffic, starting at €3/month +- [Digital Ocean](https://goo.gl/qXrNLK): Worldwide locations, IPv6 support, starting at \$5/month - [PulseHeberg](https://goo.gl/76yqW5): France, unlimited bandwidth, starting at €3/month -- [Digital Ocean](https://goo.gl/qXrNLK): Worldwide locations, IPv6 support, starting at $5/month --- @@ -102,7 +159,7 @@ Since 2016, the two scripts have diverged and are not alike anymore, especially - Windows: [The official OpenVPN community client](https://openvpn.net/index.php/download/community-downloads.html). - Linux: The `openvpn` package from your distribution. There is an [official APT repository](https://community.openvpn.net/openvpn/wiki/OpenvpnSoftwareRepos) for Debian/Ubuntu based distributions. -- macOS: [Tunnelblick](https://tunnelblick.net/). +- macOS: [Tunnelblick](https://tunnelblick.net/), [Viscosity](https://www.sparklabs.com/viscosity/). - Android: [OpenVPN for Android](https://play.google.com/store/apps/details?id=de.blinkt.openvpn). - iOS: [The official OpenVPN Connect client](https://itunes.apple.com/us/app/openvpn-connect/id590379981). @@ -120,6 +177,33 @@ Since 2016, the two scripts have diverged and are not alike anymore, especially --- +More Q&A in [FAQ.md](FAQ.md). + +## One-stop solutions for public cloud + +Solutions that provision a ready to use OpenVPN server based on this script in one go are available for: + +- AWS using Terraform at [`openvpn-terraform-install`](https://github.com/dumrauf/openvpn-terraform-install) + +## Contributing + +### Contributors hall-of-fame + +Thanks ❤️ + +[![](https://sourcerer.io/fame/angristan/angristan/openvpn-install/images/0)](https://github.com/angristan/openvpn-install/graphs/contributors) +[![](https://sourcerer.io/fame/angristan/angristan/openvpn-install/images/1)](https://github.com/angristan/openvpn-install/graphs/contributors) +[![](https://sourcerer.io/fame/angristan/angristan/openvpn-install/images/2)](https://github.com/angristan/openvpn-install/graphs/contributors) +[![](https://sourcerer.io/fame/angristan/angristan/openvpn-install/images/3)](https://github.com/angristan/openvpn-install/graphs/contributors) +[![](https://sourcerer.io/fame/angristan/angristan/openvpn-install/images/4)](https://github.com/angristan/openvpn-install/graphs/contributors) +[![](https://sourcerer.io/fame/angristan/angristan/openvpn-install/images/5)](https://github.com/angristan/openvpn-install/graphs/contributors) +[![](https://sourcerer.io/fame/angristan/angristan/openvpn-install/images/6)](https://github.com/angristan/openvpn-install/graphs/contributors) +[![](https://sourcerer.io/fame/angristan/angristan/openvpn-install/images/7)](https://github.com/angristan/openvpn-install/graphs/contributors) + +### Code formatting + +We use [shellcheck](https://github.com/koalaman/shellcheck) and [shfmt](https://github.com/mvdan/sh) to enforce bash styling guidelines and good practices. They are executed for each commit / PR with GitHub Actions, so you can check the configuration [here](https://github.com/angristan/openvpn-install/blob/master/.github/workflows/push.yml). + ## Security and Encryption OpenVPN's default settings are pretty weak regarding encryption. This script aims to improve that. @@ -128,12 +212,13 @@ OpenVPN 2.4 was a great update regarding encryption. It added support for ECDSA, If you want more information about an option mentioned below, head to the [OpenVPN manual](https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage). It is very complete. -Most of OpenVPN's encryption-related stuff is managed by [Easy-RSA](https://github.com/OpenVPN/easy-rsa). Defaults parameters are in the [vars.example](https://github.com/OpenVPN/easy-rsa/blob/v3.0.6/easyrsa3/vars.example) file. +Most of OpenVPN's encryption-related stuff is managed by [Easy-RSA](https://github.com/OpenVPN/easy-rsa). Defaults parameters are in the [vars.example](https://github.com/OpenVPN/easy-rsa/blob/v3.0.7/easyrsa3/vars.example) file. + ### Compression -By default, OpenVPN doesn't enable compression. This script provides support for LZ0 and LZ4 algorithms, the latter being more efficient. +By default, OpenVPN doesn't enable compression. This script provides support for LZ0 and LZ4 (v1/v2) algorithms, the latter being more efficient. -However, it is discouraged to use compression since it since the [VORACLE attack](https://protonvpn.com/blog/voracle-attack/) makes use of it. +However, it is discouraged to use compression since the [VORACLE attack](https://protonvpn.com/blog/voracle-attack/) makes use of it. ### TLS version @@ -164,17 +249,16 @@ By default, OpenVPN uses `BF-CBC` as the data channel cipher. Blowfish is an old > The default is BF-CBC, an abbreviation for Blowfish in Cipher Block Chaining mode. > -> Using BF-CBC is no longer recommended, because of its 64-bit block size. This small block size allows attacks based on collisions, as demonstrated by SWEET32. See https://community.openvpn.net/openvpn/wiki/SWEET32 for details. - ->Security researchers at INRIA published an attack on 64-bit block ciphers, such as 3DES and Blowfish. They show that they are able to recover plaintext when the same data is sent often enough, and show how they can use cross-site scripting vulnerabilities to send data of interest often enough. This works over HTTPS, but also works for HTTP-over-OpenVPN. See ​https://sweet32.info/ for a much better and more elaborate explanation. +> Using BF-CBC is no longer recommended, because of its 64-bit block size. This small block size allows attacks based on collisions, as demonstrated by SWEET32. See for details. +> Security researchers at INRIA published an attack on 64-bit block ciphers, such as 3DES and Blowfish. They show that they are able to recover plaintext when the same data is sent often enough, and show how they can use cross-site scripting vulnerabilities to send data of interest often enough. This works over HTTPS, but also works for HTTP-over-OpenVPN. See for a much better and more elaborate explanation. > > OpenVPN's default cipher, BF-CBC, is affected by this attack. -Indeed, AES is today's standard. It's the fastest and more secure cipher available today. [SEED](https://en.wikipedia.org/wiki/SEED) and [Camellia](https://en.wikipedia.org/wiki/Camellia_(cipher)) are not vulnerable to date but are slower than AES and relatively less trusted. +Indeed, AES is today's standard. It's the fastest and more secure cipher available today. [SEED](https://en.wikipedia.org/wiki/SEED) and [Camellia]() are not vulnerable to date but are slower than AES and relatively less trusted. > Of the currently supported ciphers, OpenVPN currently recommends using AES-256-CBC or AES-128-CBC. OpenVPN 2.4 and newer will also support GCM. For 2.4+, we recommend using AES-256-GCM or AES-128-GCM. -AES-256 is 40% slower than AES-128, and there isn't any real reason to use a 256 bits key over a 128 bits key with AES. (Source : [1](http://security.stackexchange.com/questions/14068/why-most-people-use-256-bit-encryption-instead-of-128-bit),[2](http://security.stackexchange.com/questions/6141/amount-of-simple-operations-that-is-safely-out-of-reach-for-all-humanity/6149#6149)). Moreover, AES-256 is more vulnerable to [Timing attacks](https://en.wikipedia.org/wiki/Timing_attack). +AES-256 is 40% slower than AES-128, and there isn't any real reason to use a 256 bits key over a 128 bits key with AES. (Source: [1](http://security.stackexchange.com/questions/14068/why-most-people-use-256-bit-encryption-instead-of-128-bit),[2](http://security.stackexchange.com/questions/6141/amount-of-simple-operations-that-is-safely-out-of-reach-for-all-humanity/6149#6149)). Moreover, AES-256 is more vulnerable to [Timing attacks](https://en.wikipedia.org/wiki/Timing_attack). AES-GCM is an [AEAD cipher](https://en.wikipedia.org/wiki/Authenticated_encryption) which means it simultaneously provides confidentiality, integrity, and authenticity assurances on the data. @@ -189,7 +273,7 @@ The script supports the following ciphers: And defaults to `AES-128-GCM`. -OpenVPN 2.4 added a feature called "NCP": *Negotiable Crypto Parameters*. It means you can provide a cipher suite like with HTTPS. It is set to `AES-256-GCM:AES-128-GCM` by default and overrides the `--cipher` parameter when used with an OpenVPN 2.4 client. For the sake of simplicity, the script set both the `--cipher` and `--ncp-cipher` to the cipher chosen above. +OpenVPN 2.4 added a feature called "NCP": _Negotiable Crypto Parameters_. It means you can provide a cipher suite like with HTTPS. It is set to `AES-256-GCM:AES-128-GCM` by default and overrides the `--cipher` parameter when used with an OpenVPN 2.4 client. For the sake of simplicity, the script set both the `--cipher` and `--ncp-cipher` to the cipher chosen above. ### Control channel @@ -226,11 +310,9 @@ It defaults to `prime256v1`. From the OpenVPN wiki, about `--auth`: > Authenticate data channel packets and (if enabled) tls-auth control channel packets with HMAC using message digest algorithm alg. (The default is SHA1 ). HMAC is a commonly used message authentication algorithm (MAC) that uses a data string, a secure hash algorithm, and a key, to produce a digital signature. -> +> > If an AEAD cipher mode (e.g. GCM) is chosen, the specified --auth algorithm is ignored for the data channel, and the authentication method of the AEAD cipher is used instead. Note that alg still specifies the digest used for tls-auth. -SHA1 [isn't safe anymore](https://en.wikipedia.org/wiki/SHA-1#Attacks). - The script provides the following choices: - `SHA256` @@ -244,14 +326,15 @@ It defaults to `SHA256`. From the OpenVPN wiki, about `tls-auth`: > Add an additional layer of HMAC authentication on top of the TLS control channel to mitigate DoS attacks and attacks on the TLS stack. -> +> > In a nutshell, --tls-auth enables a kind of "HMAC firewall" on OpenVPN's TCP/UDP port, where TLS control channel packets bearing an incorrect HMAC signature can be dropped immediately without response. About `tls-crypt`: > Encrypt and authenticate all control channel packets with the key from keyfile. (See --tls-auth for more background.) -> +> > Encrypting (and authenticating) control channel packets: +> > - provides more privacy by hiding the certificate used for the TLS connection, > - makes it harder to identify OpenVPN traffic as such, > - provides "poor-man's" post-quantum security, against attackers who will never know the pre-shared key (i.e. no forward secrecy). @@ -264,7 +347,7 @@ The script supports both and uses `tls-crypt` by default. ## Say thanks -You can [say thanks](https://saythanks.io/to/Angristan) if you want! +You can [say thanks](https://saythanks.io/to/angristan%40pm.me) if you want! ## Credits & Licence diff --git a/openvpn-install.sh b/openvpn-install.sh old mode 100644 new mode 100755 index d02ffe4..92bb343 --- a/openvpn-install.sh +++ b/openvpn-install.sh @@ -1,81 +1,89 @@ #!/bin/bash +# shellcheck disable=SC1091,SC2164,SC2034,SC1072,SC1073,SC1009 -# Secure OpenVPN server installer for Debian, Ubuntu, CentOS, Fedora and Arch Linux +# Secure OpenVPN server installer for Debian, Ubuntu, CentOS, Amazon Linux 2, Fedora and Arch Linux # https://github.com/angristan/openvpn-install -function isRoot () { +function isRoot() { if [ "$EUID" -ne 0 ]; then return 1 fi } -function tunAvailable () { +function tunAvailable() { if [ ! -e /dev/net/tun ]; then return 1 fi } -function checkOS () { +function checkOS() { if [[ -e /etc/debian_version ]]; then OS="debian" source /etc/os-release - if [[ "$ID" == "debian" ]]; then - if [[ ! $VERSION_ID =~ (8|9) ]]; then + if [[ $ID == "debian" || $ID == "raspbian" ]]; then + if [[ $VERSION_ID -lt 9 ]]; then echo "⚠️ Your version of Debian is not supported." echo "" - echo "However, if you're using Debian >= 9 or unstable/testing then you can continue." - echo "Keep in mind they are not supported, though." + echo "However, if you're using Debian >= 9 or unstable/testing then you can continue, at your own risk." echo "" until [[ $CONTINUE =~ (y|n) ]]; do read -rp "Continue? [y/n]: " -e CONTINUE done - if [[ "$CONTINUE" = "n" ]]; then + if [[ $CONTINUE == "n" ]]; then exit 1 fi fi - elif [[ "$ID" == "ubuntu" ]];then + elif [[ $ID == "ubuntu" ]]; then OS="ubuntu" - if [[ ! $VERSION_ID =~ (16.04|18.04) ]]; then + MAJOR_UBUNTU_VERSION=$(echo "$VERSION_ID" | cut -d '.' -f1) + if [[ $MAJOR_UBUNTU_VERSION -lt 16 ]]; then echo "⚠️ Your version of Ubuntu is not supported." echo "" - echo "However, if you're using Ubuntu > 17 or beta, then you can continue." - echo "Keep in mind they are not supported, though." + echo "However, if you're using Ubuntu >= 16.04 or beta, then you can continue, at your own risk." echo "" until [[ $CONTINUE =~ (y|n) ]]; do read -rp "Continue? [y/n]: " -e CONTINUE done - if [[ "$CONTINUE" = "n" ]]; then + if [[ $CONTINUE == "n" ]]; then exit 1 fi fi fi - elif [[ -e /etc/fedora-release ]]; then - OS=fedora - elif [[ -e /etc/centos-release ]]; then - if ! grep -qs "^CentOS Linux release 7" /etc/centos-release; then - echo "Your version of CentOS is not supported." - echo "The script only support CentOS 7." - echo "" - unset CONTINUE - until [[ $CONTINUE =~ (y|n) ]]; do - read -rp "Continue anyway? [y/n]: " -e CONTINUE - done - if [[ "$CONTINUE" = "n" ]]; then - echo "Ok, bye!" + elif [[ -e /etc/system-release ]]; then + source /etc/os-release + if [[ $ID == "fedora" ]]; then + OS="fedora" + fi + if [[ $ID == "centos" ]]; then + OS="centos" + if [[ ! $VERSION_ID =~ (7|8) ]]; then + echo "⚠️ Your version of CentOS is not supported." + echo "" + echo "The script only support CentOS 7 and CentOS 8." + echo "" + exit 1 + fi + fi + if [[ $ID == "amzn" ]]; then + OS="amzn" + if [[ $VERSION_ID != "2" ]]; then + echo "⚠️ Your version of Amazon Linux is not supported." + echo "" + echo "The script only support Amazon Linux 2." + echo "" exit 1 fi fi - OS=centos elif [[ -e /etc/arch-release ]]; then OS=arch else - echo "Looks like you aren't running this installer on a Debian, Ubuntu, Fedora, CentOS or Arch Linux system" + echo "Looks like you aren't running this installer on a Debian, Ubuntu, Fedora, CentOS, Amazon Linux 2 or Arch Linux system" exit 1 fi } -function initialCheck () { +function initialCheck() { if ! isRoot; then echo "Sorry, you need to run this as root" exit 1 @@ -87,10 +95,11 @@ function initialCheck () { checkOS } -function installUnbound () { +function installUnbound() { + # If Unbound isn't installed, install it if [[ ! -e /etc/unbound/unbound.conf ]]; then - if [[ "$OS" =~ (debian|ubuntu) ]]; then + if [[ $OS =~ (debian|ubuntu) ]]; then apt-get install -y unbound # Configuration @@ -99,9 +108,9 @@ access-control: 10.8.0.1/24 allow hide-identity: yes hide-version: yes use-caps-for-id: yes -prefetch: yes' >> /etc/unbound/unbound.conf +prefetch: yes' >>/etc/unbound/unbound.conf - elif [[ "$OS" = "centos" ]]; then + elif [[ $OS =~ (centos|amzn) ]]; then yum install -y unbound # Configuration @@ -111,7 +120,7 @@ prefetch: yes' >> /etc/unbound/unbound.conf sed -i 's|# hide-version: no|hide-version: yes|' /etc/unbound/unbound.conf sed -i 's|use-caps-for-id: no|use-caps-for-id: yes|' /etc/unbound/unbound.conf - elif [[ "$OS" = "fedora" ]]; then + elif [[ $OS == "fedora" ]]; then dnf install -y unbound # Configuration @@ -121,14 +130,16 @@ prefetch: yes' >> /etc/unbound/unbound.conf sed -i 's|# hide-version: no|hide-version: yes|' /etc/unbound/unbound.conf sed -i 's|# use-caps-for-id: no|use-caps-for-id: yes|' /etc/unbound/unbound.conf - elif [[ "$OS" = "arch" ]]; then + elif [[ $OS == "arch" ]]; then pacman -Syu --noconfirm unbound # Get root servers list curl -o /etc/unbound/root.hints https://www.internic.net/domain/named.cache - mv /etc/unbound/unbound.conf /etc/unbound/unbound.conf.old - + if [[ ! -f /etc/unbound/unbound.conf.old ]]; then + mv /etc/unbound/unbound.conf /etc/unbound/unbound.conf.old + fi + echo 'server: use-syslog: yes do-daemonize: no @@ -145,22 +156,29 @@ prefetch: yes' >> /etc/unbound/unbound.conf hide-identity: yes hide-version: yes qname-minimisation: yes - prefetch: yes' > /etc/unbound/unbound.conf + prefetch: yes' >/etc/unbound/unbound.conf fi - if [[ ! "$OS" =~ (fedora|centos) ]];then + # IPv6 DNS for all OS + if [[ $IPV6_SUPPORT == 'y' ]]; then + echo 'interface: fd42:42:42:42::1 +access-control: fd42:42:42:42::/112 allow' >>/etc/unbound/unbound.conf + fi + + if [[ ! $OS =~ (fedora|centos|amzn) ]]; then # DNS Rebinding fix echo "private-address: 10.0.0.0/8 +private-address: fd42:42:42:42::/112 private-address: 172.16.0.0/12 private-address: 192.168.0.0/16 private-address: 169.254.0.0/16 private-address: fd00::/8 private-address: fe80::/10 private-address: 127.0.0.0/8 -private-address: ::ffff:0:0/96" >> /etc/unbound/unbound.conf +private-address: ::ffff:0:0/96" >>/etc/unbound/unbound.conf fi else # Unbound is already installed - echo 'include: /etc/unbound/openvpn.conf' >> /etc/unbound/unbound.conf + echo 'include: /etc/unbound/openvpn.conf' >>/etc/unbound/unbound.conf # Add Unbound 'server' for the OpenVPN subnet echo 'server: @@ -171,20 +189,25 @@ hide-version: yes use-caps-for-id: yes prefetch: yes private-address: 10.0.0.0/8 +private-address: fd42:42:42:42::/112 private-address: 172.16.0.0/12 private-address: 192.168.0.0/16 private-address: 169.254.0.0/16 private-address: fd00::/8 private-address: fe80::/10 private-address: 127.0.0.0/8 -private-address: ::ffff:0:0/96' > /etc/unbound/openvpn.conf +private-address: ::ffff:0:0/96' >/etc/unbound/openvpn.conf + if [[ $IPV6_SUPPORT == 'y' ]]; then + echo 'interface: fd42:42:42:42::1 +access-control: fd42:42:42:42::/112 allow' >>/etc/unbound/openvpn.conf + fi fi - systemctl enable unbound - systemctl restart unbound + systemctl enable unbound + systemctl restart unbound } -function installQuestions () { +function installQuestions() { echo "Welcome to the OpenVPN installer!" echo "The git repository is available at: https://github.com/angristan/openvpn-install" echo "" @@ -196,15 +219,25 @@ function installQuestions () { echo "Unless your server is behind NAT, it should be your public IPv4 address." # Detect public IPv4 address and pre-fill for the user - IP=$(ip addr | grep 'inet' | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | head -1) - read -rp "IP address: " -e -i "$IP" IP + IP=$(ip -4 addr | sed -ne 's|^.* inet \([^/]*\)/.* scope global.*$|\1|p' | head -1) + + if [[ -z $IP ]]; then + # Detect public IPv6 address + IP=$(ip -6 addr | sed -ne 's|^.* inet6 \([^/]*\)/.* scope global.*$|\1|p' | head -1) + fi + APPROVE_IP=${APPROVE_IP:-n} + if [[ $APPROVE_IP =~ n ]]; then + read -rp "IP address: " -e -i "$IP" IP + fi # If $IP is a private IP address, the server must be behind NAT if echo "$IP" | grep -qE '^(10\.|172\.1[6789]\.|172\.2[0-9]\.|172\.3[01]\.|192\.168)'; then echo "" echo "It seems this server is behind NAT. What is its public IPv4 address or hostname?" echo "We need it for the clients to connect to the server." - until [[ "$PUBLICIP" != "" ]]; do - read -rp "Public IPv4 address or hostname: " -e PUBLICIP + + PUBLICIP=$(curl -s https://api.ipify.org) + until [[ $ENDPOINT != "" ]]; do + read -rp "Public IPv4 address or hostname: " -e -i "$PUBLICIP" ENDPOINT done fi @@ -212,7 +245,7 @@ function installQuestions () { echo "Checking for IPv6 connectivity..." echo "" # "ping6" and "ping -6" availability varies depending on the distribution - if type ping6 > /dev/null 2>&1; then + if type ping6 >/dev/null 2>&1; then PING6="ping6 -c3 ipv6.google.com > /dev/null 2>&1" else PING6="ping -6 -c3 ipv6.google.com > /dev/null 2>&1" @@ -234,22 +267,22 @@ function installQuestions () { echo " 1) Default: 1194" echo " 2) Custom" echo " 3) Random [49152-65535]" - until [[ "$PORT_CHOICE" =~ ^[1-3]$ ]]; do + until [[ $PORT_CHOICE =~ ^[1-3]$ ]]; do read -rp "Port choice [1-3]: " -e -i 1 PORT_CHOICE done case $PORT_CHOICE in - 1) - PORT="1194" + 1) + PORT="1194" ;; - 2) - until [[ "$PORT" =~ ^[0-9]+$ ]] && [ "$PORT" -ge 1 ] && [ "$PORT" -le 65535 ]; do - read -rp "Custom port [1-65535]: " -e -i 1194 PORT - done + 2) + until [[ $PORT =~ ^[0-9]+$ ]] && [ "$PORT" -ge 1 ] && [ "$PORT" -le 65535 ]; do + read -rp "Custom port [1-65535]: " -e -i 1194 PORT + done ;; - 3) - # Generate random number within private ports range - PORT=$(shuf -i49152-65535 -n1) - echo "Random Port: $PORT" + 3) + # Generate random number within private ports range + PORT=$(shuf -i49152-65535 -n1) + echo "Random Port: $PORT" ;; esac echo "" @@ -257,15 +290,15 @@ function installQuestions () { echo "UDP is faster. Unless it is not available, you shouldn't use TCP." echo " 1) UDP" echo " 2) TCP" - until [[ "$PROTOCOL_CHOICE" =~ ^[1-2]$ ]]; do + until [[ $PROTOCOL_CHOICE =~ ^[1-2]$ ]]; do read -rp "Protocol [1-2]: " -e -i 1 PROTOCOL_CHOICE done case $PROTOCOL_CHOICE in - 1) - PROTOCOL="udp" + 1) + PROTOCOL="udp" ;; - 2) - PROTOCOL="tcp" + 2) + PROTOCOL="tcp" ;; esac echo "" @@ -280,44 +313,60 @@ function installQuestions () { echo " 8) OpenDNS (Anycast: worldwide)" echo " 9) Google (Anycast: worldwide)" echo " 10) Yandex Basic (Russia)" - echo " 11) AdGuard DNS (Russia)" - until [[ "$DNS" =~ ^[0-9]+$ ]] && [ "$DNS" -ge 1 ] && [ "$DNS" -le 11 ]; do - read -rp "DNS [1-10]: " -e -i 3 DNS - if [[ $DNS == 2 ]] && [[ -e /etc/unbound/unbound.conf ]]; then - echo "" - echo "Unbound is already installed." - echo "You can allow the script to configure it in order to use it from your OpenVPN clients" - echo "We will simply add a second server to /etc/unbound/unbound.conf for the OpenVPN subnet." - echo "No changes are made to the current configuration." - echo "" + echo " 11) AdGuard DNS (Anycast: worldwide)" + echo " 12) NextDNS (Anycast: worldwide)" + echo " 13) Custom" + until [[ $DNS =~ ^[0-9]+$ ]] && [ "$DNS" -ge 1 ] && [ "$DNS" -le 13 ]; do + read -rp "DNS [1-12]: " -e -i 11 DNS + if [[ $DNS == 2 ]] && [[ -e /etc/unbound/unbound.conf ]]; then + echo "" + echo "Unbound is already installed." + echo "You can allow the script to configure it in order to use it from your OpenVPN clients" + echo "We will simply add a second server to /etc/unbound/unbound.conf for the OpenVPN subnet." + echo "No changes are made to the current configuration." + echo "" - until [[ $CONTINUE =~ (y|n) ]]; do - read -rp "Apply configuration changes to Unbound? [y/n]: " -e CONTINUE - done - if [[ $CONTINUE = "n" ]];then - # Break the loop and cleanup - unset DNS - unset CONTINUE - fi + until [[ $CONTINUE =~ (y|n) ]]; do + read -rp "Apply configuration changes to Unbound? [y/n]: " -e CONTINUE + done + if [[ $CONTINUE == "n" ]]; then + # Break the loop and cleanup + unset DNS + unset CONTINUE fi + elif [[ $DNS == "13" ]]; then + until [[ $DNS1 =~ ^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$ ]]; do + read -rp "Primary DNS: " -e DNS1 + done + until [[ $DNS2 =~ ^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$ ]]; do + read -rp "Secondary DNS (optional): " -e DNS2 + if [[ $DNS2 == "" ]]; then + break + fi + done + fi done echo "" echo "Do you want to use compression? It is not recommended since the VORACLE attack make use of it." until [[ $COMPRESSION_ENABLED =~ (y|n) ]]; do read -rp"Enable compression? [y/n]: " -e -i n COMPRESSION_ENABLED done - if [[ $COMPRESSION_ENABLED == "y" ]];then - echo "Choose which compression algorithm you want to use:" - echo " 1) LZ4 (more efficient)" - echo " 2) LZ0" - until [[ $COMPRESSION_CHOICE =~ ^[1-2]$ ]]; do - read -rp"Compression algorithm [1-2]: " -e -i 1 COMPRESSION_CHOICE + if [[ $COMPRESSION_ENABLED == "y" ]]; then + echo "Choose which compression algorithm you want to use: (they are ordered by efficiency)" + echo " 1) LZ4-v2" + echo " 2) LZ4" + echo " 3) LZ0" + until [[ $COMPRESSION_CHOICE =~ ^[1-3]$ ]]; do + read -rp"Compression algorithm [1-3]: " -e -i 1 COMPRESSION_CHOICE done case $COMPRESSION_CHOICE in - 1) + 1) + COMPRESSION_ALG="lz4-v2" + ;; + 2) COMPRESSION_ALG="lz4" ;; - 2) + 3) COMPRESSION_ALG="lzo" ;; esac @@ -331,7 +380,7 @@ function installQuestions () { until [[ $CUSTOMIZE_ENC =~ (y|n) ]]; do read -rp "Customize encryption settings? [y/n]: " -e -i n CUSTOMIZE_ENC done - if [[ $CUSTOMIZE_ENC == "n" ]];then + if [[ $CUSTOMIZE_ENC == "n" ]]; then # Use default, sane and fast parameters CIPHER="AES-128-GCM" CERT_TYPE="1" # ECDSA @@ -350,27 +399,27 @@ function installQuestions () { echo " 4) AES-128-CBC" echo " 5) AES-192-CBC" echo " 6) AES-256-CBC" - until [[ "$CIPHER_CHOICE" =~ ^[1-6]$ ]]; do + until [[ $CIPHER_CHOICE =~ ^[1-6]$ ]]; do read -rp "Cipher [1-6]: " -e -i 1 CIPHER_CHOICE done case $CIPHER_CHOICE in - 1) - CIPHER="AES-128-GCM" + 1) + CIPHER="AES-128-GCM" ;; - 2) - CIPHER="AES-192-GCM" + 2) + CIPHER="AES-192-GCM" ;; - 3) - CIPHER="AES-256-GCM" + 3) + CIPHER="AES-256-GCM" ;; - 4) - CIPHER="AES-128-CBC" + 4) + CIPHER="AES-128-CBC" ;; - 5) - CIPHER="AES-192-CBC" + 5) + CIPHER="AES-192-CBC" ;; - 6) - CIPHER="AES-256-CBC" + 6) + CIPHER="AES-256-CBC" ;; esac echo "" @@ -381,81 +430,81 @@ function installQuestions () { read -rp"Certificate key type [1-2]: " -e -i 1 CERT_TYPE done case $CERT_TYPE in + 1) + echo "" + echo "Choose which curve you want to use for the certificate's key:" + echo " 1) prime256v1 (recommended)" + echo " 2) secp384r1" + echo " 3) secp521r1" + until [[ $CERT_CURVE_CHOICE =~ ^[1-3]$ ]]; do + read -rp"Curve [1-3]: " -e -i 1 CERT_CURVE_CHOICE + done + case $CERT_CURVE_CHOICE in 1) - echo "" - echo "Choose which curve you want to use for the certificate's key:" - echo " 1) prime256v1 (recommended)" - echo " 2) secp384r1" - echo " 3) secp521r1" - until [[ $CERT_CURVE_CHOICE =~ ^[1-3]$ ]]; do - read -rp"Curve [1-3]: " -e -i 1 CERT_CURVE_CHOICE - done - case $CERT_CURVE_CHOICE in - 1) - CERT_CURVE="prime256v1" - ;; - 2) - CERT_CURVE="secp384r1" - ;; - 3) - CERT_CURVE="secp521r1" - ;; - esac - ;; + CERT_CURVE="prime256v1" + ;; 2) - echo "" - echo "Choose which size you want to use for the certificate's RSA key:" - echo " 1) 2048 bits (recommended)" - echo " 2) 3072 bits" - echo " 3) 4096 bits" - until [[ "$RSA_KEY_SIZE_CHOICE" =~ ^[1-3]$ ]]; do - read -rp "RSA key size [1-3]: " -e -i 1 RSA_KEY_SIZE_CHOICE - done - case $RSA_KEY_SIZE_CHOICE in - 1) - RSA_KEY_SIZE="2048" - ;; - 2) - RSA_KEY_SIZE="3072" - ;; - 3) - RSA_KEY_SIZE="4096" - ;; - esac + CERT_CURVE="secp384r1" + ;; + 3) + CERT_CURVE="secp521r1" + ;; + esac + ;; + 2) + echo "" + echo "Choose which size you want to use for the certificate's RSA key:" + echo " 1) 2048 bits (recommended)" + echo " 2) 3072 bits" + echo " 3) 4096 bits" + until [[ $RSA_KEY_SIZE_CHOICE =~ ^[1-3]$ ]]; do + read -rp "RSA key size [1-3]: " -e -i 1 RSA_KEY_SIZE_CHOICE + done + case $RSA_KEY_SIZE_CHOICE in + 1) + RSA_KEY_SIZE="2048" + ;; + 2) + RSA_KEY_SIZE="3072" + ;; + 3) + RSA_KEY_SIZE="4096" + ;; + esac ;; esac echo "" echo "Choose which cipher you want to use for the control channel:" case $CERT_TYPE in + 1) + echo " 1) ECDHE-ECDSA-AES-128-GCM-SHA256 (recommended)" + echo " 2) ECDHE-ECDSA-AES-256-GCM-SHA384" + until [[ $CC_CIPHER_CHOICE =~ ^[1-2]$ ]]; do + read -rp"Control channel cipher [1-2]: " -e -i 1 CC_CIPHER_CHOICE + done + case $CC_CIPHER_CHOICE in 1) - echo " 1) ECDHE-ECDSA-AES-128-GCM-SHA256 (recommended)" - echo " 2) ECDHE-ECDSA-AES-256-GCM-SHA384" - until [[ $CC_CIPHER_CHOICE =~ ^[1-2]$ ]]; do - read -rp"Control channel cipher [1-2]: " -e -i 1 CC_CIPHER_CHOICE - done - case $CC_CIPHER_CHOICE in - 1) - CC_CIPHER="TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256" - ;; - 2) - CC_CIPHER="TLS-ECDHE-ECDSA-WITH-AES-256-GCM-SHA384" - ;; - esac - ;; + CC_CIPHER="TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256" + ;; 2) - echo " 1) ECDHE-RSA-AES-128-GCM-SHA256 (recommended)" - echo " 2) ECDHE-RSA-AES-256-GCM-SHA384" - until [[ $CC_CIPHER_CHOICE =~ ^[1-2]$ ]]; do - read -rp"Control channel cipher [1-2]: " -e -i 1 CC_CIPHER_CHOICE - done - case $CC_CIPHER_CHOICE in - 1) - CC_CIPHER="TLS-ECDHE-RSA-WITH-AES-128-GCM-SHA256" - ;; - 2) - CC_CIPHER="TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384" - ;; - esac + CC_CIPHER="TLS-ECDHE-ECDSA-WITH-AES-256-GCM-SHA384" + ;; + esac + ;; + 2) + echo " 1) ECDHE-RSA-AES-128-GCM-SHA256 (recommended)" + echo " 2) ECDHE-RSA-AES-256-GCM-SHA384" + until [[ $CC_CIPHER_CHOICE =~ ^[1-2]$ ]]; do + read -rp"Control channel cipher [1-2]: " -e -i 1 CC_CIPHER_CHOICE + done + case $CC_CIPHER_CHOICE in + 1) + CC_CIPHER="TLS-ECDHE-RSA-WITH-AES-128-GCM-SHA256" + ;; + 2) + CC_CIPHER="TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384" + ;; + esac ;; esac echo "" @@ -466,54 +515,54 @@ function installQuestions () { read -rp"DH key type [1-2]: " -e -i 1 DH_TYPE done case $DH_TYPE in + 1) + echo "" + echo "Choose which curve you want to use for the ECDH key:" + echo " 1) prime256v1 (recommended)" + echo " 2) secp384r1" + echo " 3) secp521r1" + while [[ $DH_CURVE_CHOICE != "1" && $DH_CURVE_CHOICE != "2" && $DH_CURVE_CHOICE != "3" ]]; do + read -rp"Curve [1-3]: " -e -i 1 DH_CURVE_CHOICE + done + case $DH_CURVE_CHOICE in 1) - echo "" - echo "Choose which curve you want to use for the ECDH key:" - echo " 1) prime256v1 (recommended)" - echo " 2) secp384r1" - echo " 3) secp521r1" - while [[ $DH_CURVE_CHOICE != "1" && $DH_CURVE_CHOICE != "2" && $DH_CURVE_CHOICE != "3" ]]; do - read -rp"Curve [1-3]: " -e -i 1 DH_CURVE_CHOICE - done - case $DH_CURVE_CHOICE in - 1) - DH_CURVE="prime256v1" - ;; - 2) - DH_CURVE="secp384r1" - ;; - 3) - DH_CURVE="secp521r1" - ;; - esac - ;; + DH_CURVE="prime256v1" + ;; 2) - echo "" - echo "Choose what size of Diffie-Hellman key you want to use:" - echo " 1) 2048 bits (recommended)" - echo " 2) 3072 bits" - echo " 3) 4096 bits" - until [[ "$DH_KEY_SIZE_CHOICE" =~ ^[1-3]$ ]]; do - read -rp "DH key size [1-3]: " -e -i 1 DH_KEY_SIZE_CHOICE - done - case $DH_KEY_SIZE_CHOICE in - 1) - DH_KEY_SIZE="2048" - ;; - 2) - DH_KEY_SIZE="3072" - ;; - 3) - DH_KEY_SIZE="4096" - ;; - esac + DH_CURVE="secp384r1" + ;; + 3) + DH_CURVE="secp521r1" + ;; + esac + ;; + 2) + echo "" + echo "Choose what size of Diffie-Hellman key you want to use:" + echo " 1) 2048 bits (recommended)" + echo " 2) 3072 bits" + echo " 3) 4096 bits" + until [[ $DH_KEY_SIZE_CHOICE =~ ^[1-3]$ ]]; do + read -rp "DH key size [1-3]: " -e -i 1 DH_KEY_SIZE_CHOICE + done + case $DH_KEY_SIZE_CHOICE in + 1) + DH_KEY_SIZE="2048" + ;; + 2) + DH_KEY_SIZE="3072" + ;; + 3) + DH_KEY_SIZE="4096" + ;; + esac ;; esac echo "" # The "auth" options behaves differently with AEAD ciphers - if [[ "$CIPHER" =~ CBC$ ]]; then + if [[ $CIPHER =~ CBC$ ]]; then echo "The digest algorithm authenticates data channel packets and tls-auth packets from the control channel." - elif [[ "$CIPHER" =~ GCM$ ]]; then + elif [[ $CIPHER =~ GCM$ ]]; then echo "The digest algorithm authenticates tls-auth packets from the control channel." fi echo "Which digest algorithm do you want to use for HMAC?" @@ -524,14 +573,14 @@ function installQuestions () { read -rp "Digest algorithm [1-3]: " -e -i 1 HMAC_ALG_CHOICE done case $HMAC_ALG_CHOICE in - 1) - HMAC_ALG="SHA256" + 1) + HMAC_ALG="SHA256" ;; - 2) - HMAC_ALG="SHA384" + 2) + HMAC_ALG="SHA384" ;; - 3) - HMAC_ALG="SHA512" + 3) + HMAC_ALG="SHA512" ;; esac echo "" @@ -540,61 +589,95 @@ function installQuestions () { echo " 1) tls-crypt (recommended)" echo " 2) tls-auth" until [[ $TLS_SIG =~ [1-2] ]]; do - read -rp "Control channel additional security mechanism [1-2]: " -e -i 1 TLS_SIG + read -rp "Control channel additional security mechanism [1-2]: " -e -i 1 TLS_SIG done fi echo "" echo "Okay, that was all I needed. We are ready to setup your OpenVPN server now." echo "You will be able to generate a client at the end of the installation." - read -n1 -r -p "Press any key to continue..." + APPROVE_INSTALL=${APPROVE_INSTALL:-n} + if [[ $APPROVE_INSTALL =~ n ]]; then + read -n1 -r -p "Press any key to continue..." + fi } -function installOpenVPN () { - # Run setup questions first +function installOpenVPN() { + if [[ $AUTO_INSTALL == "y" ]]; then + # Set default choices so that no questions will be asked. + APPROVE_INSTALL=${APPROVE_INSTALL:-y} + APPROVE_IP=${APPROVE_IP:-y} + IPV6_SUPPORT=${IPV6_SUPPORT:-n} + PORT_CHOICE=${PORT_CHOICE:-1} + PROTOCOL_CHOICE=${PROTOCOL_CHOICE:-1} + DNS=${DNS:-1} + COMPRESSION_ENABLED=${COMPRESSION_ENABLED:-n} + CUSTOMIZE_ENC=${CUSTOMIZE_ENC:-n} + CLIENT=${CLIENT:-client} + PASS=${PASS:-1} + CONTINUE=${CONTINUE:-y} + + # Behind NAT, we'll default to the publicly reachable IPv4/IPv6. + if [[ $IPV6_SUPPORT == "y" ]]; then + PUBLIC_IP=$(curl https://ifconfig.co) + else + PUBLIC_IP=$(curl -4 https://ifconfig.co) + fi + ENDPOINT=${ENDPOINT:-$PUBLIC_IP} + fi + + # Run setup questions first, and set other variales if auto-install installQuestions # Get the "public" interface from the default route NIC=$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1) + if [[ -z $NIC ]] && [[ $IPV6_SUPPORT == 'y' ]]; then + NIC=$(ip -6 route show default | sed -ne 's/^default .* dev \([^ ]*\) .*$/\1/p') + fi - if [[ "$OS" =~ (debian|ubuntu) ]]; then - apt-get update - apt-get -y install ca-certificates gnupg - # We add the OpenVPN repo to get the latest version. - if [[ "$VERSION_ID" = "8" ]]; then - echo "deb http://build.openvpn.net/debian/openvpn/stable jessie main" > /etc/apt/sources.list.d/openvpn.list - wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add - - apt-get update - fi - if [[ "$VERSION_ID" = "16.04" ]]; then - echo "deb http://build.openvpn.net/debian/openvpn/stable trusty main" > /etc/apt/sources.list.d/openvpn.list - wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add - - apt-get update - fi - # Ubuntu > 16.04 and Debian > 8 have OpenVPN >= 2.4 without the need of a third party repository. - apt-get install -y openvpn iptables openssl wget ca-certificates curl - elif [[ "$OS" = 'centos' ]]; then - yum install -y epel-release - yum install -y openvpn iptables openssl wget ca-certificates curl - elif [[ "$OS" = 'fedora' ]]; then - dnf install -y openvpn iptables openssl wget ca-certificates curl - elif [[ "$OS" = 'arch' ]]; then - echo "" - echo "WARNING: As you're using ArchLinux, I need to update the packages on your system to install those I need." - echo "Not doing that could cause problems between dependencies, or missing files in repositories (Arch Linux does not support partial upgrades)." - echo "" - echo "Continuing will update your installed packages and install needed ones." - echo "" - unset CONTINUE + # $NIC can not be empty for script rm-openvpn-rules.sh + if [[ -z $NIC ]]; then + echo + echo "Can not detect public interface." + echo "This needs for setup MASQUERADE." until [[ $CONTINUE =~ (y|n) ]]; do - read -rp "Continue? [y/n]: " -e -i y CONTINUE + read -rp "Continue? [y/n]: " -e CONTINUE done - if [[ "$CONTINUE" = "n" ]]; then - echo "Exiting because user did not permit updating the system." - exit 4 + if [[ $CONTINUE == "n" ]]; then + exit 1 fi + fi - # Install required dependencies and upgrade the system - pacman --needed --noconfirm -Syu openvpn iptables openssl wget ca-certificates curl + # If OpenVPN isn't installed yet, install it. This script is more-or-less + # idempotent on multiple runs, but will only install OpenVPN from upstream + # the first time. + if [[ ! -e /etc/openvpn/server.conf ]]; then + if [[ $OS =~ (debian|ubuntu) ]]; then + apt-get update + apt-get -y install ca-certificates gnupg + # We add the OpenVPN repo to get the latest version. + if [[ $VERSION_ID == "16.04" ]]; then + echo "deb http://build.openvpn.net/debian/openvpn/stable xenial main" >/etc/apt/sources.list.d/openvpn.list + wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add - + apt-get update + fi + # Ubuntu > 16.04 and Debian > 8 have OpenVPN >= 2.4 without the need of a third party repository. + apt-get install -y openvpn iptables openssl wget ca-certificates curl + elif [[ $OS == 'centos' ]]; then + yum install -y epel-release + yum install -y openvpn iptables openssl wget ca-certificates curl tar 'policycoreutils-python*' + elif [[ $OS == 'amzn' ]]; then + amazon-linux-extras install -y epel + yum install -y openvpn iptables openssl wget ca-certificates curl + elif [[ $OS == 'fedora' ]]; then + dnf install -y openvpn iptables openssl wget ca-certificates curl policycoreutils-python-utils + elif [[ $OS == 'arch' ]]; then + # Install required dependencies and upgrade the system + pacman --needed --noconfirm -Syu openvpn iptables openssl wget ca-certificates curl + fi + # An old version of easy-rsa was available by default in some openvpn packages + if [[ -d /etc/openvpn/easy-rsa/ ]]; then + rm -rf /etc/openvpn/easy-rsa/ + fi fi # Find out if the machine uses nogroup or nobody for the permissionless group @@ -604,73 +687,77 @@ function installOpenVPN () { NOGROUP=nobody fi - # An old version of easy-rsa was available by default in some openvpn packages - if [[ -d /etc/openvpn/easy-rsa/ ]]; then - rm -rf /etc/openvpn/easy-rsa/ - fi + # Install the latest version of easy-rsa from source, if not already installed. + if [[ ! -d /etc/openvpn/easy-rsa/ ]]; then + local version="3.0.7" + wget -O ~/easy-rsa.tgz https://github.com/OpenVPN/easy-rsa/releases/download/v${version}/EasyRSA-${version}.tgz + mkdir -p /etc/openvpn/easy-rsa + tar xzf ~/easy-rsa.tgz --strip-components=1 --directory /etc/openvpn/easy-rsa + rm -f ~/easy-rsa.tgz - # Install the latest version of easy-rsa from source - local version="3.0.5" - wget -O ~/EasyRSA-nix-${version}.tgz https://github.com/OpenVPN/easy-rsa/releases/download/v${version}/EasyRSA-nix-${version}.tgz - tar xzf ~/EasyRSA-nix-${version}.tgz -C ~/ - mv ~/EasyRSA-${version}/ /etc/openvpn/ - mv /etc/openvpn/EasyRSA-${version}/ /etc/openvpn/easy-rsa/ - chown -R root:root /etc/openvpn/easy-rsa/ - rm -f ~/EasyRSA-nix-${version}.tgz - - cd /etc/openvpn/easy-rsa/ - case $CERT_TYPE in + cd /etc/openvpn/easy-rsa/ || return + case $CERT_TYPE in 1) - echo "set_var EASYRSA_ALGO ec" > vars - echo "set_var EASYRSA_CURVE $CERT_CURVE" >> vars - ;; + echo "set_var EASYRSA_ALGO ec" >vars + echo "set_var EASYRSA_CURVE $CERT_CURVE" >>vars + ;; 2) - echo "set_var EASYRSA_KEY_SIZE $RSA_KEY_SIZE" > vars - ;; - esac + echo "set_var EASYRSA_KEY_SIZE $RSA_KEY_SIZE" >vars + ;; + esac - # Generate a random, alphanumeric identifier of 16 characters for CN and one for server name - SERVER_CN="cn_$(head /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)" - SERVER_NAME="server_$(head /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)" - echo "set_var EASYRSA_REQ_CN $SERVER_CN" >> vars - # Create the PKI, set up the CA, the DH params and the server certificate - ./easyrsa init-pki - ./easyrsa --batch build-ca nopass + # Generate a random, alphanumeric identifier of 16 characters for CN and one for server name + SERVER_CN="cn_$(head /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)" + echo "$SERVER_CN" >SERVER_CN_GENERATED + SERVER_NAME="server_$(head /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)" + echo "$SERVER_NAME" >SERVER_NAME_GENERATED - if [[ $DH_TYPE == "2" ]]; then - # ECDH keys are generated on-the-fly so we don't need to generate them beforehand - openssl dhparam -out dh.pem $DH_KEY_SIZE - fi - - ./easyrsa build-server-full "$SERVER_NAME" nopass - EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl - - case $TLS_SIG in + echo "set_var EASYRSA_REQ_CN $SERVER_CN" >>vars + + # Create the PKI, set up the CA, the DH params and the server certificate + ./easyrsa init-pki + ./easyrsa --batch build-ca nopass + + if [[ $DH_TYPE == "2" ]]; then + # ECDH keys are generated on-the-fly so we don't need to generate them beforehand + openssl dhparam -out dh.pem $DH_KEY_SIZE + fi + + ./easyrsa build-server-full "$SERVER_NAME" nopass + EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl + + case $TLS_SIG in 1) # Generate tls-crypt key openvpn --genkey --secret /etc/openvpn/tls-crypt.key - ;; + ;; 2) # Generate tls-auth key openvpn --genkey --secret /etc/openvpn/tls-auth.key - ;; - esac - + ;; + esac + else + # If easy-rsa is already installed, grab the generated SERVER_NAME + # for client configs + cd /etc/openvpn/easy-rsa/ || return + SERVER_NAME=$(cat SERVER_NAME_GENERATED) + fi + # Move all the generated files cp pki/ca.crt pki/private/ca.key "pki/issued/$SERVER_NAME.crt" "pki/private/$SERVER_NAME.key" /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn if [[ $DH_TYPE == "2" ]]; then cp dh.pem /etc/openvpn fi - + # Make cert revocation list readable for non-root chmod 644 /etc/openvpn/crl.pem # Generate server.conf - echo "port $PORT" > /etc/openvpn/server.conf - if [[ "$IPV6_SUPPORT" = 'n' ]]; then - echo "proto $PROTOCOL" >> /etc/openvpn/server.conf - elif [[ "$IPV6_SUPPORT" = 'y' ]]; then - echo "proto ${PROTOCOL}6" >> /etc/openvpn/server.conf + echo "port $PORT" >/etc/openvpn/server.conf + if [[ $IPV6_SUPPORT == 'n' ]]; then + echo "proto $PROTOCOL" >>/etc/openvpn/server.conf + elif [[ $IPV6_SUPPORT == 'y' ]]; then + echo "proto ${PROTOCOL}6" >>/etc/openvpn/server.conf fi echo "dev tun @@ -681,145 +768,164 @@ persist-tun keepalive 10 120 topology subnet server 10.8.0.0 255.255.255.0 -ifconfig-pool-persist ipp.txt" >> /etc/openvpn/server.conf +ifconfig-pool-persist ipp.txt" >>/etc/openvpn/server.conf # DNS resolvers case $DNS in - 1) - # Locate the proper resolv.conf - # Needed for systems running systemd-resolved - if grep -q "127.0.0.53" "/etc/resolv.conf"; then - RESOLVCONF='/run/systemd/resolve/resolv.conf' - else - RESOLVCONF='/etc/resolv.conf' + 1) # Current system resolvers + # Locate the proper resolv.conf + # Needed for systems running systemd-resolved + if grep -q "127.0.0.53" "/etc/resolv.conf"; then + RESOLVCONF='/run/systemd/resolve/resolv.conf' + else + RESOLVCONF='/etc/resolv.conf' + fi + # Obtain the resolvers from resolv.conf and use them for OpenVPN + sed -ne 's/^nameserver[[:space:]]\+\([^[:space:]]\+\).*$/\1/p' $RESOLVCONF | while read -r line; do + # Copy, if it's a IPv4 |or| if IPv6 is enabled, IPv4/IPv6 does not matter + if [[ $line =~ ^[0-9.]*$ ]] || [[ $IPV6_SUPPORT == 'y' ]]; then + echo "push \"dhcp-option DNS $line\"" >>/etc/openvpn/server.conf fi - # Obtain the resolvers from resolv.conf and use them for OpenVPN - grep -v '#' $RESOLVCONF | grep 'nameserver' | grep -E -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | while read -r line; do - echo "push \"dhcp-option DNS $line\"" >> /etc/openvpn/server.conf - done + done ;; - 2) - echo 'push "dhcp-option DNS 10.8.0.1"' >> /etc/openvpn/server.conf + 2) # Self-hosted DNS resolver (Unbound) + echo 'push "dhcp-option DNS 10.8.0.1"' >>/etc/openvpn/server.conf + if [[ $IPV6_SUPPORT == 'y' ]]; then + echo 'push "dhcp-option DNS fd42:42:42:42::1"' >>/etc/openvpn/server.conf + fi ;; - 3) # Cloudflare - echo 'push "dhcp-option DNS 1.0.0.1"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 1.1.1.1"' >> /etc/openvpn/server.conf + 3) # Cloudflare + echo 'push "dhcp-option DNS 1.0.0.1"' >>/etc/openvpn/server.conf + echo 'push "dhcp-option DNS 1.1.1.1"' >>/etc/openvpn/server.conf ;; - 4) # Quad9 - echo 'push "dhcp-option DNS 9.9.9.9"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 149.112.112.112"' >> /etc/openvpn/server.conf + 4) # Quad9 + echo 'push "dhcp-option DNS 9.9.9.9"' >>/etc/openvpn/server.conf + echo 'push "dhcp-option DNS 149.112.112.112"' >>/etc/openvpn/server.conf ;; - 5) # Quad9 uncensored - echo 'push "dhcp-option DNS 9.9.9.10"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 149.112.112.10"' >> /etc/openvpn/server.conf + 5) # Quad9 uncensored + echo 'push "dhcp-option DNS 9.9.9.10"' >>/etc/openvpn/server.conf + echo 'push "dhcp-option DNS 149.112.112.10"' >>/etc/openvpn/server.conf ;; - 6) # FDN - echo 'push "dhcp-option DNS 80.67.169.40"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 80.67.169.12"' >> /etc/openvpn/server.conf + 6) # FDN + echo 'push "dhcp-option DNS 80.67.169.40"' >>/etc/openvpn/server.conf + echo 'push "dhcp-option DNS 80.67.169.12"' >>/etc/openvpn/server.conf ;; - 7) # DNS.WATCH - echo 'push "dhcp-option DNS 84.200.69.80"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 84.200.70.40"' >> /etc/openvpn/server.conf + 7) # DNS.WATCH + echo 'push "dhcp-option DNS 84.200.69.80"' >>/etc/openvpn/server.conf + echo 'push "dhcp-option DNS 84.200.70.40"' >>/etc/openvpn/server.conf ;; - 8) # OpenDNS - echo 'push "dhcp-option DNS 208.67.222.222"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 208.67.220.220"' >> /etc/openvpn/server.conf + 8) # OpenDNS + echo 'push "dhcp-option DNS 208.67.222.222"' >>/etc/openvpn/server.conf + echo 'push "dhcp-option DNS 208.67.220.220"' >>/etc/openvpn/server.conf ;; - 9) # Google - echo 'push "dhcp-option DNS 8.8.8.8"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 8.8.4.4"' >> /etc/openvpn/server.conf + 9) # Google + echo 'push "dhcp-option DNS 8.8.8.8"' >>/etc/openvpn/server.conf + echo 'push "dhcp-option DNS 8.8.4.4"' >>/etc/openvpn/server.conf ;; - 10) # Yandex Basic - echo 'push "dhcp-option DNS 77.88.8.8"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 77.88.8.1"' >> /etc/openvpn/server.conf + 10) # Yandex Basic + echo 'push "dhcp-option DNS 77.88.8.8"' >>/etc/openvpn/server.conf + echo 'push "dhcp-option DNS 77.88.8.1"' >>/etc/openvpn/server.conf ;; - 11) # AdGuard DNS - echo 'push "dhcp-option DNS 176.103.130.130"' >> /etc/openvpn/server.conf - echo 'push "dhcp-option DNS 176.103.130.131"' >> /etc/openvpn/server.conf + 11) # AdGuard DNS + echo 'push "dhcp-option DNS 176.103.130.130"' >>/etc/openvpn/server.conf + echo 'push "dhcp-option DNS 176.103.130.131"' >>/etc/openvpn/server.conf + ;; + 12) # NextDNS + echo 'push "dhcp-option DNS 45.90.28.167"' >>/etc/openvpn/server.conf + echo 'push "dhcp-option DNS 45.90.30.167"' >>/etc/openvpn/server.conf + ;; + 13) # Custom DNS + echo "push \"dhcp-option DNS $DNS1\"" >>/etc/openvpn/server.conf + if [[ $DNS2 != "" ]]; then + echo "push \"dhcp-option DNS $DNS2\"" >>/etc/openvpn/server.conf + fi ;; esac - echo 'push "redirect-gateway def1 bypass-dhcp"' >> /etc/openvpn/server.conf + echo 'push "redirect-gateway def1 bypass-dhcp"' >>/etc/openvpn/server.conf # IPv6 network settings if needed - if [[ "$IPV6_SUPPORT" = 'y' ]]; then + if [[ $IPV6_SUPPORT == 'y' ]]; then echo 'server-ipv6 fd42:42:42:42::/112 tun-ipv6 push tun-ipv6 push "route-ipv6 2000::/3" -push "redirect-gateway ipv6"' >> /etc/openvpn/server.conf +push "redirect-gateway ipv6"' >>/etc/openvpn/server.conf fi - if [[ $COMPRESSION_ENABLED == "y" ]]; then - echo "compress $COMPRESSION_ALG" >> /etc/openvpn/server.conf + if [[ $COMPRESSION_ENABLED == "y" ]]; then + echo "compress $COMPRESSION_ALG" >>/etc/openvpn/server.conf fi if [[ $DH_TYPE == "1" ]]; then - echo "dh none" >> /etc/openvpn/server.conf - echo "ecdh-curve $DH_CURVE" >> /etc/openvpn/server.conf + echo "dh none" >>/etc/openvpn/server.conf + echo "ecdh-curve $DH_CURVE" >>/etc/openvpn/server.conf elif [[ $DH_TYPE == "2" ]]; then - echo "dh dh.pem" >> /etc/openvpn/server.conf + echo "dh dh.pem" >>/etc/openvpn/server.conf fi case $TLS_SIG in - 1) - echo "tls-crypt tls-crypt.key 0" >> /etc/openvpn/server.conf + 1) + echo "tls-crypt tls-crypt.key" >>/etc/openvpn/server.conf ;; - 2) - echo "tls-auth tls-auth.key 0" >> /etc/openvpn/server.conf + 2) + echo "tls-auth tls-auth.key 0" >>/etc/openvpn/server.conf ;; esac echo "crl-verify crl.pem ca ca.crt cert $SERVER_NAME.crt -key $SERVER_NAME.key +key $SERVER_NAME.key auth $HMAC_ALG cipher $CIPHER ncp-ciphers $CIPHER tls-server tls-version-min 1.2 tls-cipher $CC_CIPHER +client-config-dir /etc/openvpn/ccd status /var/log/openvpn/status.log -verb 3" >> /etc/openvpn/server.conf +verb 3" >>/etc/openvpn/server.conf + # Create client-config-dir dir + mkdir -p /etc/openvpn/ccd # Create log dir mkdir -p /var/log/openvpn # Enable routing - echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.d/20-openvpn.conf - if [[ "$IPV6_SUPPORT" = 'y' ]]; then - echo 'net.ipv6.conf.all.forwarding=1' >> /etc/sysctl.d/20-openvpn.conf + echo 'net.ipv4.ip_forward=1' >/etc/sysctl.d/99-openvpn.conf + if [[ $IPV6_SUPPORT == 'y' ]]; then + echo 'net.ipv6.conf.all.forwarding=1' >>/etc/sysctl.d/99-openvpn.conf fi - # Avoid an unneeded reboot + # Apply sysctl rules sysctl --system # If SELinux is enabled and a custom port was selected, we need this if hash sestatus 2>/dev/null; then if sestatus | grep "Current mode" | grep -qs "enforcing"; then - if [[ "$PORT" != '1194' ]]; then + if [[ $PORT != '1194' ]]; then semanage port -a -t openvpn_port_t -p "$PROTOCOL" "$PORT" fi fi fi # Finally, restart and enable OpenVPN - if [[ "$OS" = 'arch' || "$OS" = 'fedora' ]]; then + if [[ $OS == 'arch' || $OS == 'fedora' || $OS == 'centos' ]]; then # Don't modify package-provided service cp /usr/lib/systemd/system/openvpn-server@.service /etc/systemd/system/openvpn-server@.service - + # Workaround to fix OpenVPN service on OpenVZ sed -i 's|LimitNPROC|#LimitNPROC|' /etc/systemd/system/openvpn-server@.service # Another workaround to keep using /etc/openvpn/ sed -i 's|/etc/openvpn/server|/etc/openvpn|' /etc/systemd/system/openvpn-server@.service # On fedora, the service hardcodes the ciphers. We want to manage the cipher ourselves, so we remove it from the service - if [[ "$OS" == "fedora" ]];then + if [[ $OS == "fedora" ]]; then sed -i 's|--cipher AES-256-GCM --ncp-ciphers AES-256-GCM:AES-128-GCM:AES-256-CBC:AES-128-CBC:BF-CBC||' /etc/systemd/system/openvpn-server@.service fi systemctl daemon-reload - systemctl restart openvpn-server@server systemctl enable openvpn-server@server - elif [[ "$OS" == "ubuntu" ]] && [[ "$VERSION_ID" == "16.04" ]]; then + systemctl restart openvpn-server@server + elif [[ $OS == "ubuntu" ]] && [[ $VERSION_ID == "16.04" ]]; then # On Ubuntu 16.04, we use the package from the OpenVPN repo # This package uses a sysvinit service systemctl enable openvpn @@ -827,37 +933,38 @@ verb 3" >> /etc/openvpn/server.conf else # Don't modify package-provided service cp /lib/systemd/system/openvpn\@.service /etc/systemd/system/openvpn\@.service - + # Workaround to fix OpenVPN service on OpenVZ sed -i 's|LimitNPROC|#LimitNPROC|' /etc/systemd/system/openvpn\@.service # Another workaround to keep using /etc/openvpn/ sed -i 's|/etc/openvpn/server|/etc/openvpn|' /etc/systemd/system/openvpn\@.service - + systemctl daemon-reload - systemctl restart openvpn@server systemctl enable openvpn@server + systemctl restart openvpn@server fi - if [[ $DNS == 2 ]];then + if [[ $DNS == 2 ]]; then installUnbound fi # Add iptables rules in two scripts - mkdir /etc/iptables + mkdir -p /etc/iptables # Script to add rules echo "#!/bin/sh -iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o $NIC -j MASQUERADE -iptables -A INPUT -i tun0 -j ACCEPT -iptables -A FORWARD -i $NIC -o tun0 -j ACCEPT -iptables -A FORWARD -i tun0 -o $NIC -j ACCEPT -iptables -A INPUT -i $NIC -p $PROTOCOL --dport $PORT -j ACCEPT" > /etc/iptables/add-openvpn-rules.sh +iptables -t nat -I POSTROUTING 1 -s 10.8.0.0/24 -o $NIC -j MASQUERADE +iptables -I INPUT 1 -i tun0 -j ACCEPT +iptables -I FORWARD 1 -i $NIC -o tun0 -j ACCEPT +iptables -I FORWARD 1 -i tun0 -o $NIC -j ACCEPT +iptables -I INPUT 1 -i $NIC -p $PROTOCOL --dport $PORT -j ACCEPT" >/etc/iptables/add-openvpn-rules.sh - if [[ "$IPV6_SUPPORT" = 'y' ]]; then - echo "ip6tables -t nat -A POSTROUTING -s fd42:42:42:42::/112 -o $NIC -j MASQUERADE -ip6tables -A INPUT -i tun0 -j ACCEPT -ip6tables -A FORWARD -i $NIC -o tun0 -j ACCEPT -ip6tables -A FORWARD -i tun0 -o $NIC -j ACCEPT" >> /etc/iptables/add-openvpn-rules.sh + if [[ $IPV6_SUPPORT == 'y' ]]; then + echo "ip6tables -t nat -I POSTROUTING 1 -s fd42:42:42:42::/112 -o $NIC -j MASQUERADE +ip6tables -I INPUT 1 -i tun0 -j ACCEPT +ip6tables -I FORWARD 1 -i $NIC -o tun0 -j ACCEPT +ip6tables -I FORWARD 1 -i tun0 -o $NIC -j ACCEPT +ip6tables -I INPUT 1 -i $NIC -p $PROTOCOL --dport $PORT -j ACCEPT" >>/etc/iptables/add-openvpn-rules.sh fi # Script to remove rules @@ -866,13 +973,14 @@ iptables -t nat -D POSTROUTING -s 10.8.0.0/24 -o $NIC -j MASQUERADE iptables -D INPUT -i tun0 -j ACCEPT iptables -D FORWARD -i $NIC -o tun0 -j ACCEPT iptables -D FORWARD -i tun0 -o $NIC -j ACCEPT -iptables -D INPUT -i $NIC -p $PROTOCOL --dport $PORT -j ACCEPT" > /etc/iptables/rm-openvpn-rules.sh +iptables -D INPUT -i $NIC -p $PROTOCOL --dport $PORT -j ACCEPT" >/etc/iptables/rm-openvpn-rules.sh - if [[ "$IPV6_SUPPORT" = 'y' ]]; then + if [[ $IPV6_SUPPORT == 'y' ]]; then echo "ip6tables -t nat -D POSTROUTING -s fd42:42:42:42::/112 -o $NIC -j MASQUERADE ip6tables -D INPUT -i tun0 -j ACCEPT ip6tables -D FORWARD -i $NIC -o tun0 -j ACCEPT -ip6tables -D FORWARD -i tun0 -o $NIC -j ACCEPT" >> /etc/iptables/rm-openvpn-rules.sh +ip6tables -D FORWARD -i tun0 -o $NIC -j ACCEPT +ip6tables -D INPUT -i $NIC -p $PROTOCOL --dport $PORT -j ACCEPT" >>/etc/iptables/rm-openvpn-rules.sh fi chmod +x /etc/iptables/add-openvpn-rules.sh @@ -891,7 +999,7 @@ ExecStop=/etc/iptables/rm-openvpn-rules.sh RemainAfterExit=yes [Install] -WantedBy=multi-user.target" > /etc/systemd/system/iptables-openvpn.service +WantedBy=multi-user.target" >/etc/systemd/system/iptables-openvpn.service # Enable service and apply rules systemctl daemon-reload @@ -899,16 +1007,17 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables-openvpn.service systemctl start iptables-openvpn # If the server is behind a NAT, use the correct IP address for the clients to connect to - if [[ "$PUBLICIP" != "" ]]; then - IP=$PUBLICIP + if [[ $ENDPOINT != "" ]]; then + IP=$ENDPOINT fi # client-template.txt is created so we have a template to add further users later - echo "client" > /etc/openvpn/client-template.txt - if [[ "$PROTOCOL" = 'udp' ]]; then - echo "proto udp" >> /etc/openvpn/client-template.txt - elif [[ "$PROTOCOL" = 'tcp' ]]; then - echo "proto tcp-client" >> /etc/openvpn/client-template.txt + echo "client" >/etc/openvpn/client-template.txt + if [[ $PROTOCOL == 'udp' ]]; then + echo "proto udp" >>/etc/openvpn/client-template.txt + echo "explicit-exit-notify" >>/etc/openvpn/client-template.txt + elif [[ $PROTOCOL == 'tcp' ]]; then + echo "proto tcp-client" >>/etc/openvpn/client-template.txt fi echo "remote $IP $PORT dev tun @@ -924,24 +1033,25 @@ cipher $CIPHER tls-client tls-version-min 1.2 tls-cipher $CC_CIPHER +ignore-unknown-option block-outside-dns setenv opt block-outside-dns # Prevent Windows 10 DNS leak -verb 3" >> /etc/openvpn/client-template.txt +verb 3" >>/etc/openvpn/client-template.txt -if [[ $COMPRESSION_ENABLED == "y" ]]; then - echo "compress $COMPRESSION_ALG" >> /etc/openvpn/client-template.txt -fi + if [[ $COMPRESSION_ENABLED == "y" ]]; then + echo "compress $COMPRESSION_ALG" >>/etc/openvpn/client-template.txt + fi # Generate the custom client.ovpn newClient echo "If you want to add more clients, you simply need to run this script another time!" } -function newClient () { +function newClient() { echo "" echo "Tell me a name for the client." - echo "Use one word only, no special characters." + echo "The name must consist of alphanumeric character. It may also include an underscore or a dash." - until [[ "$CLIENT" =~ ^[a-zA-Z0-9_]+$ ]]; do + until [[ $CLIENT =~ ^[a-zA-Z0-9_-]+$ ]]; do read -rp "Client name: " -e CLIENT done @@ -951,27 +1061,35 @@ function newClient () { echo " 1) Add a passwordless client" echo " 2) Use a password for the client" - until [[ "$PASS" =~ ^[1-2]$ ]]; do + until [[ $PASS =~ ^[1-2]$ ]]; do read -rp "Select an option [1-2]: " -e -i 1 PASS done - cd /etc/openvpn/easy-rsa/ || return - case $PASS in + CLIENTEXISTS=$(tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep -c -E "/CN=$CLIENT\$") + if [[ $CLIENTEXISTS == '1' ]]; then + echo "" + echo "The specified client CN was already found in easy-rsa, please choose another name." + exit + else + cd /etc/openvpn/easy-rsa/ || return + case $PASS in 1) ./easyrsa build-client-full "$CLIENT" nopass - ;; + ;; 2) - echo "⚠️ You will be asked for the client password below ⚠️" + echo "⚠️ You will be asked for the client password below ⚠️" ./easyrsa build-client-full "$CLIENT" - ;; - esac + ;; + esac + echo "Client $CLIENT added." + fi # Home directory of the user, where the client configuration (.ovpn) will be written - if [ -e "/home/$CLIENT" ]; then # if $1 is a user name + if [ -e "/home/$CLIENT" ]; then # if $1 is a user name homeDir="/home/$CLIENT" - elif [ "${SUDO_USER}" ]; then # if not, use SUDO_USER + elif [ "${SUDO_USER}" ]; then # if not, use SUDO_USER homeDir="/home/${SUDO_USER}" - else # if not SUDO_USER, use /root + else # if not SUDO_USER, use /root homeDir="/root" fi @@ -998,28 +1116,30 @@ function newClient () { echo "" case $TLS_SIG in - 1) - echo "" - cat /etc/openvpn/tls-crypt.key - echo "" + 1) + echo "" + cat /etc/openvpn/tls-crypt.key + echo "" ;; - 2) - echo "key-direction 1" - echo "" - cat /etc/openvpn/tls-auth.key - echo "" + 2) + echo "key-direction 1" + echo "" + cat /etc/openvpn/tls-auth.key + echo "" ;; esac - } >> "$homeDir/$CLIENT.ovpn" + } >>"$homeDir/$CLIENT.ovpn" echo "" - echo "Client $CLIENT added, the configuration file is available at $homeDir/$CLIENT.ovpn." + echo "The configuration file has been written to $homeDir/$CLIENT.ovpn." echo "Download the .ovpn file and import it in your OpenVPN client." + + exit 0 } -function revokeClient () { +function revokeClient() { NUMBEROFCLIENTS=$(tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep -c "^V") - if [[ "$NUMBEROFCLIENTS" = '0' ]]; then + if [[ $NUMBEROFCLIENTS == '0' ]]; then echo "" echo "You have no existing clients!" exit 1 @@ -1028,36 +1148,32 @@ function revokeClient () { echo "" echo "Select the existing client certificate you want to revoke" tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') ' - if [[ "$NUMBEROFCLIENTS" = '1' ]]; then - read -rp "Select one client [1]: " CLIENTNUMBER - else - read -rp "Select one client [1-$NUMBEROFCLIENTS]: " CLIENTNUMBER - fi - + until [[ $CLIENTNUMBER -ge 1 && $CLIENTNUMBER -le $NUMBEROFCLIENTS ]]; do + if [[ $CLIENTNUMBER == '1' ]]; then + read -rp "Select one client [1]: " CLIENTNUMBER + else + read -rp "Select one client [1-$NUMBEROFCLIENTS]: " CLIENTNUMBER + fi + done CLIENT=$(tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$CLIENTNUMBER"p) - cd /etc/openvpn/easy-rsa/ + cd /etc/openvpn/easy-rsa/ || return ./easyrsa --batch revoke "$CLIENT" EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl - # Cleanup - rm -f "pki/reqs/$CLIENT.req" - rm -f "pki/private/$CLIENT.key" - rm -f "pki/issued/$CLIENT.crt" rm -f /etc/openvpn/crl.pem cp /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn/crl.pem chmod 644 /etc/openvpn/crl.pem find /home/ -maxdepth 2 -name "$CLIENT.ovpn" -delete rm -f "/root/$CLIENT.ovpn" - sed -i "s|^$CLIENT,.*||" /etc/openvpn/ipp.txt + sed -i "/^$CLIENT,.*/d" /etc/openvpn/ipp.txt echo "" echo "Certificate for client $CLIENT revoked." } -function removeUnbound () { +function removeUnbound() { # Remove OpenVPN-related config - sed -i 's|include: \/etc\/unbound\/openvpn.conf||' /etc/unbound/unbound.conf + sed -i '/include: \/etc\/unbound\/openvpn.conf/d' /etc/unbound/unbound.conf rm /etc/unbound/openvpn.conf - systemctl restart unbound until [[ $REMOVE_UNBOUND =~ (y|n) ]]; do echo "" @@ -1065,17 +1181,17 @@ function removeUnbound () { read -rp "Do you want to completely remove Unbound? [y/n]: " -e REMOVE_UNBOUND done - if [[ "$REMOVE_UNBOUND" = 'y' ]]; then + if [[ $REMOVE_UNBOUND == 'y' ]]; then # Stop Unbound systemctl stop unbound - if [[ "$OS" =~ (debian|ubuntu) ]]; then + if [[ $OS =~ (debian|ubuntu) ]]; then apt-get autoremove --purge -y unbound - elif [[ "$OS" = 'arch' ]]; then + elif [[ $OS == 'arch' ]]; then pacman --noconfirm -R unbound - elif [[ "$OS" = 'centos' ]]; then + elif [[ $OS =~ (centos|amzn) ]]; then yum remove -y unbound - elif [[ "$OS" = 'fedora' ]]; then + elif [[ $OS == 'fedora' ]]; then dnf remove -y unbound fi @@ -1084,25 +1200,27 @@ function removeUnbound () { echo "" echo "Unbound removed!" else + systemctl restart unbound echo "" echo "Unbound wasn't removed." fi } -function removeOpenVPN () { +function removeOpenVPN() { echo "" read -rp "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE - if [[ "$REMOVE" = 'y' ]]; then + if [[ $REMOVE == 'y' ]]; then # Get OpenVPN port from the configuration PORT=$(grep '^port ' /etc/openvpn/server.conf | cut -d " " -f 2) + PROTOCOL=$(grep '^proto ' /etc/openvpn/server.conf | cut -d " " -f 2) # Stop OpenVPN - if [[ "$OS" =~ (fedora|arch) ]]; then + if [[ $OS =~ (fedora|arch|centos) ]]; then systemctl disable openvpn-server@server systemctl stop openvpn-server@server # Remove customised service rm /etc/systemd/system/openvpn-server@.service - elif [[ "$OS" == "ubuntu" ]] && [[ "$VERSION_ID" == "16.04" ]]; then + elif [[ $OS == "ubuntu" ]] && [[ $VERSION_ID == "16.04" ]]; then systemctl disable openvpn systemctl stop openvpn else @@ -1124,23 +1242,23 @@ function removeOpenVPN () { # SELinux if hash sestatus 2>/dev/null; then if sestatus | grep "Current mode" | grep -qs "enforcing"; then - if [[ "$PORT" != '1194' ]]; then - semanage port -d -t openvpn_port_t -p udp "$PORT" + if [[ $PORT != '1194' ]]; then + semanage port -d -t openvpn_port_t -p "$PROTOCOL" "$PORT" fi fi fi - if [[ "$OS" =~ (debian|ubuntu) ]]; then + if [[ $OS =~ (debian|ubuntu) ]]; then apt-get autoremove --purge -y openvpn - if [[ -e /etc/apt/sources.list.d/openvpn.list ]];then + if [[ -e /etc/apt/sources.list.d/openvpn.list ]]; then rm /etc/apt/sources.list.d/openvpn.list apt-get update fi - elif [[ "$OS" = 'arch' ]]; then + elif [[ $OS == 'arch' ]]; then pacman --noconfirm -R openvpn - elif [[ "$OS" = 'centos' ]]; then + elif [[ $OS =~ (centos|amzn) ]]; then yum remove -y openvpn - elif [[ "$OS" = 'fedora' ]]; then + elif [[ $OS == 'fedora' ]]; then dnf remove -y openvpn fi @@ -1149,7 +1267,7 @@ function removeOpenVPN () { find /root/ -maxdepth 1 -name "*.ovpn" -delete rm -rf /etc/openvpn rm -rf /usr/share/doc/openvpn* - rm -f /etc/sysctl.d/20-openvpn.conf + rm -f /etc/sysctl.d/99-openvpn.conf rm -rf /var/log/openvpn # Unbound @@ -1164,8 +1282,7 @@ function removeOpenVPN () { fi } -function manageMenu () { - clear +function manageMenu() { echo "Welcome to OpenVPN-install!" echo "The git repository is available at: https://github.com/angristan/openvpn-install" echo "" @@ -1176,22 +1293,22 @@ function manageMenu () { echo " 2) Revoke existing user" echo " 3) Remove OpenVPN" echo " 4) Exit" - until [[ "$MENU_OPTION" =~ ^[1-4]$ ]]; do + until [[ $MENU_OPTION =~ ^[1-4]$ ]]; do read -rp "Select an option [1-4]: " MENU_OPTION done case $MENU_OPTION in - 1) - newClient + 1) + newClient ;; - 2) - revokeClient + 2) + revokeClient ;; - 3) - removeOpenVPN + 3) + removeOpenVPN ;; - 4) - exit 0 + 4) + exit 0 ;; esac } @@ -1200,7 +1317,7 @@ function manageMenu () { initialCheck # Check if OpenVPN is already installed -if [[ -e /etc/openvpn/server.conf ]]; then +if [[ -e /etc/openvpn/server.conf && $AUTO_INSTALL != "y" ]]; then manageMenu else installOpenVPN