Merge branch 'master' into patch-1
This commit is contained in:
cezar97
GitHub
commit
8ae059727f
3 changed files with 138 additions and 87 deletions
5
LICENSE
5
LICENSE
|
|
@ -1,6 +1,7 @@
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|||
The MIT License (MIT)
|
||||
MIT License
|
||||
|
||||
Copyright (c) 2016 Nyr, Angristan
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Copyright (c) 2013 Nyr
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Copyright (c) 2016 Angristan (Stanislas Lange)
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||||
|
||||
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
|
||||
|
|
|
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15
README.md
15
README.md
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@ -40,11 +40,11 @@ When OpenVPN is installed, you can run the script again, and you will get the ch
|
|||
|
||||
This script is based on the great work of [Nyr and its contributors](https://github.com/Nyr/openvpn-install).
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|
||||
I made it because I wanted to have a more secured OpenVPN out-of-the-box. It works like the original script, but is more focused on privacy and espicially better encryption. Nyr's original script uses mainly default parameters regarding encryption, and some of them are unsecure. See [#encryption](#encryption).
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||||
I made it because I wanted to have a more secured OpenVPN out-of-the-box. It works like the original script, but is more focused on privacy and especially better encryption. Nyr's original script uses mainly default parameters regarding encryption, and some of them are insecure. See [#encryption](#encryption).
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|
||||
Also, Nyr and myself clearly have not the same point of view regarding this script, that's why it's a fork.
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|
||||
The only drawback is that you need to use a recent version of OpenVPN, because some parameters that requires TLS 1.2 are only availble since OpenVPN 2.3.3. Therefore I restrain the compatibility of this script to a few but widely used GNU/Linux distributions, to get a recent version of OpenVPN from trusted third-party repositories, if needed. That is not a complete drawback tough, because it means that you can have the latest version with all the new features and security fixes. See [compatibilty](#compatibility).
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The only drawback is that you need to use a recent version of OpenVPN, because some parameters that requires TLS 1.2 are only available since OpenVPN 2.3.3. Therefore I restrain the compatibility of this script to a few but widely used GNU/Linux distributions, to get a recent version of OpenVPN from trusted third-party repositories, if needed. That is not a complete drawback tough, because it means that you can have the latest version with all the new features and security fixes. See [compatibility](#compatibility).
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|
||||
On the client-side, it's less problematic, but if you want to use an OpenVPN server installed with this script with an old client (\<2.3.3), it won't work. However I don't see why you would use an outdated client.
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|
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|
|
@ -62,6 +62,7 @@ The script is made to work on these OS and architectures :
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- **Ubuntu 14.04 LTS** (i386, amd64)
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- **Ubuntu 16.04 LTS** (i386, amd64, armhf)
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- **Ubuntu 17.10** (i386, amd64, armhf, arm64)
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||||
- **Ubuntu 18.04 LTS** (i386, amd64, armhf, arm64)
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||||
- **Fedora 25** (amd64)
|
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- **Fedora 26** (amd64)
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||||
- **Fedora 27** (amd64)
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|
|
@ -185,7 +186,7 @@ The [SWEET32 vulnerability page](https://community.openvpn.net/openvpn/wiki/SWEE
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|
||||
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.
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|
||||
As they have not any proven vulnerabilities, I decided to give the user the choice to use them, though I don't see any particular reason to this day to use it. Maybe someday if AES happens to be broken. Here is an exemple about [why Camellia is good, but AES is better and should be used](http://crypto.stackexchange.com/questions/476/why-does-nobody-use-or-break-the-camellia-cipher/477#477).
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As they have not any proven vulnerabilities, I decided to give the user the choice to use them, though I don't see any particular reason to this day to use it. Maybe someday if AES happens to be broken. Here is an example about [why Camellia is good, but AES is better and should be used](http://crypto.stackexchange.com/questions/476/why-does-nobody-use-or-break-the-camellia-cipher/477#477).
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Currently AES is only available in its CBC mode, which is weaker than GCM.
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|
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@ -213,7 +214,7 @@ Thus, the best data channel cipher currently available in OpenVPN is `AES-128-CB
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### Control channel's cipher
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According to the [Hardening](https://community.openvpn.net/openvpn/wiki/Hardening#Useof--tls-cipher) page of the OpenVPN wiki, TLS 1.2 is not supported by OpenVPN <2.3.3, so it uses a TLS 1.0 cipher by default, which is unsecure.
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According to the [Hardening](https://community.openvpn.net/openvpn/wiki/Hardening#Useof--tls-cipher) page of the OpenVPN wiki, TLS 1.2 is not supported by OpenVPN <2.3.3, so it uses a TLS 1.0 cipher by default, which is insecure.
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|
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> The following are TLSv1.2 DHE + RSA choices, requiring a compatible peer running at least OpenVPN 2.3.3:
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- TLS-DHE-RSA-WITH-AES-256-GCM-SHA384
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|
|
@ -229,7 +230,7 @@ Thus, I have chosen `TLS-DHE-RSA-WITH-AES-128-GCM-SHA256` as the control channel
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|||
|
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OpenVPN uses a 2048 bits DH key [by default](https://github.com/OpenVPN/easy-rsa/blob/master/easyrsa3/vars.example#L97).
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|
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2048 bits is OK, but both [NSA](https://cryptome.org/2016/01/CNSA-Suite-and-Quantum-Computing-FAQ.pdf) and [ANSSI](https://www.ssi.gouv.fr/uploads/2015/01/RGS_v-2-0_B1.pdf) recommend at least a 3072 bits for a future-proof key. Like RSA, the size of the key will have an impact on speed, I leave the choice to use a 2048, 3072 or 4096 bits key. 4096 bits is what's most used and recommened today, but 3072 bits is still good.
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2048 bits is OK, but both [NSA](https://cryptome.org/2016/01/CNSA-Suite-and-Quantum-Computing-FAQ.pdf) and [ANSSI](https://www.ssi.gouv.fr/uploads/2015/01/RGS_v-2-0_B1.pdf) recommend at least a 3072 bits for a future-proof key. Like RSA, the size of the key will have an impact on speed, I leave the choice to use a 2048, 3072 or 4096 bits key. 4096 bits is what's most used and recommended today, but 3072 bits is still good.
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In OpenVPN 2.4, we will be able to use ECDH key. It uses elliptic curves instead of prime numbers' factorization for a reduced key size and calculation time, thus it's faster and more secure.
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|
@ -254,6 +255,10 @@ SHA-1 is not safe anymore, so I use SHA-256 which is safe and widely used.
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|
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TLS-Auth is not enabled by default by OpenVPN, but it is in this script.
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|
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## Check for DNS leaks
|
||||
|
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Go to [dnsleaktest.com](https://dnsleaktest.com/) or [ipleak.net](https://ipleak.net/) with your browser. Only your server's IP should show up.
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|
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## Say thanks
|
||||
|
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You can [say thanks](https://saythanks.io/to/Angristan) if you want!
|
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|
|
|
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|
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@ -4,16 +4,19 @@
|
|||
# https://github.com/Angristan/OpenVPN-install
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|
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# Verify root
|
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if [[ "$EUID" -ne 0 ]]; then
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echo "Sorry, you need to run this as root"
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exit 1
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fi
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|
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# Verify tun
|
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if [[ ! -e /dev/net/tun ]]; then
|
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echo "TUN is not available"
|
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exit 2
|
||||
fi
|
||||
|
||||
# Check if CentOS 5
|
||||
if grep -qs "CentOS release 5" "/etc/redhat-release"; then
|
||||
echo "CentOS 5 is too old and not supported"
|
||||
exit 3
|
||||
|
|
@ -22,10 +25,10 @@ fi
|
|||
if [[ -e /etc/debian_version ]]; then
|
||||
OS="debian"
|
||||
# Getting the version number, to verify that a recent version of OpenVPN is available
|
||||
VERSION_ID=$(cat /etc/os-release | grep "VERSION_ID")
|
||||
VERSION_ID=$(grep "VERSION_ID" /etc/os-release)
|
||||
IPTABLES='/etc/iptables/iptables.rules'
|
||||
SYSCTL='/etc/sysctl.conf'
|
||||
if [[ "$VERSION_ID" != 'VERSION_ID="7"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="8"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="9"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="14.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="17.10"' ]]; then
|
||||
if [[ "$VERSION_ID" != 'VERSION_ID="7"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="8"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="9"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="14.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="17.10"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="18.04"' ]]; then
|
||||
echo "Your version of Debian/Ubuntu is not supported."
|
||||
echo "I can't install a recent version of OpenVPN on your system."
|
||||
echo ""
|
||||
|
|
@ -33,7 +36,7 @@ if [[ -e /etc/debian_version ]]; then
|
|||
echo "then you can continue, a recent version of OpenVPN is available on these."
|
||||
echo "Keep in mind they are not supported, though."
|
||||
while [[ $CONTINUE != "y" && $CONTINUE != "n" ]]; do
|
||||
read -p "Continue ? [y/n]: " -e CONTINUE
|
||||
read -rp "Continue ? [y/n]: " -e CONTINUE
|
||||
done
|
||||
if [[ "$CONTINUE" = "n" ]]; then
|
||||
echo "Ok, bye !"
|
||||
|
|
@ -59,37 +62,35 @@ fi
|
|||
|
||||
newclient () {
|
||||
# Where to write the custom client.ovpn?
|
||||
if [ -e /home/$1 ]; then # if $1 is a user name
|
||||
if [ -e "/home/$1" ]; then # if $1 is a user name
|
||||
homeDir="/home/$1"
|
||||
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
|
||||
homeDir="/root"
|
||||
fi
|
||||
# Generates the custom client.ovpn
|
||||
cp /etc/openvpn/client-template.txt $homeDir/$1.ovpn
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||||
echo "<ca>" >> $homeDir/$1.ovpn
|
||||
cat /etc/openvpn/easy-rsa/pki/ca.crt >> $homeDir/$1.ovpn
|
||||
echo "</ca>" >> $homeDir/$1.ovpn
|
||||
echo "<cert>" >> $homeDir/$1.ovpn
|
||||
cat /etc/openvpn/easy-rsa/pki/issued/$1.crt | awk '/BEGIN/,/END/' >> $homeDir/$1.ovpn
|
||||
echo "</cert>" >> $homeDir/$1.ovpn
|
||||
echo "<key>" >> $homeDir/$1.ovpn
|
||||
cat /etc/openvpn/easy-rsa/pki/private/$1.key >> $homeDir/$1.ovpn
|
||||
echo "</key>" >> $homeDir/$1.ovpn
|
||||
echo "key-direction 1" >> $homeDir/$1.ovpn
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||||
echo "<tls-auth>" >> $homeDir/$1.ovpn
|
||||
cat /etc/openvpn/tls-auth.key >> $homeDir/$1.ovpn
|
||||
echo "</tls-auth>" >> $homeDir/$1.ovpn
|
||||
cp /etc/openvpn/client-template.txt "$homeDir/$1.ovpn"
|
||||
{
|
||||
echo "<ca>"
|
||||
cat "/etc/openvpn/easy-rsa/pki/ca.crt"
|
||||
echo "</ca>"
|
||||
|
||||
echo "<cert>"
|
||||
cat "/etc/openvpn/easy-rsa/pki/issued/$1.crt" | awk '/BEGIN/,/END/'
|
||||
echo "</cert>"
|
||||
|
||||
echo "<key>"
|
||||
cat "/etc/openvpn/easy-rsa/pki/private/$1.key"
|
||||
echo "</key>"
|
||||
echo "key-direction 1"
|
||||
|
||||
echo "<tls-auth>"
|
||||
cat "/etc/openvpn/tls-auth.key"
|
||||
echo "</tls-auth>"
|
||||
} >> "$homeDir/$1.ovpn"
|
||||
}
|
||||
|
||||
# Try to get our IP from the system and fallback to the Internet.
|
||||
# I do this to make the script compatible with NATed servers (LowEndSpirit/Scaleway)
|
||||
# and to avoid getting an IPv6.
|
||||
IP=$(ip addr | grep 'inet' | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | grep -o -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | head -1)
|
||||
if [[ "$IP" = "" ]]; then
|
||||
IP=$(wget -qO- ipv4.icanhazip.com)
|
||||
fi
|
||||
# Get Internet network interface with default route
|
||||
NIC=$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1)
|
||||
|
||||
|
|
@ -101,22 +102,27 @@ if [[ -e /etc/openvpn/server.conf ]]; then
|
|||
echo ""
|
||||
echo "Looks like OpenVPN is already installed"
|
||||
echo ""
|
||||
|
||||
echo "What do you want to do?"
|
||||
echo " 1) Add a cert for a new user"
|
||||
echo " 2) Revoke existing user cert"
|
||||
echo " 3) Remove OpenVPN"
|
||||
echo " 4) Exit"
|
||||
read -p "Select an option [1-4]: " option
|
||||
read -rp "Select an option [1-4]: " option
|
||||
|
||||
case $option in
|
||||
1)
|
||||
echo ""
|
||||
echo "Tell me a name for the client cert"
|
||||
echo "Please, use one word only, no special characters"
|
||||
read -p "Client name: " -e -i newclient CLIENT
|
||||
cd /etc/openvpn/easy-rsa/
|
||||
read -rp "Client name: " -e -i newclient CLIENT
|
||||
|
||||
cd /etc/openvpn/easy-rsa/ || return
|
||||
./easyrsa build-client-full $CLIENT nopass
|
||||
|
||||
# Generates the custom client.ovpn
|
||||
newclient "$CLIENT"
|
||||
|
||||
echo ""
|
||||
echo "Client $CLIENT added, certs available at $homeDir/$CLIENT.ovpn"
|
||||
exit
|
||||
|
|
@ -128,26 +134,29 @@ if [[ -e /etc/openvpn/server.conf ]]; then
|
|||
echo "You have no existing clients!"
|
||||
exit 5
|
||||
fi
|
||||
|
||||
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 [[ "$NUMBEROFCLIENTS" = '1' ]]; then
|
||||
read -p "Select one client [1]: " CLIENTNUMBER
|
||||
read -rp "Select one client [1]: " CLIENTNUMBER
|
||||
else
|
||||
read -p "Select one client [1-$NUMBEROFCLIENTS]: " CLIENTNUMBER
|
||||
read -rp "Select one client [1-$NUMBEROFCLIENTS]: " CLIENTNUMBER
|
||||
fi
|
||||
|
||||
CLIENT=$(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 $CLIENT
|
||||
EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
|
||||
rm -rf pki/reqs/$CLIENT.req
|
||||
rm -rf pki/private/$CLIENT.key
|
||||
rm -rf pki/issued/$CLIENT.crt
|
||||
rm -rf /etc/openvpn/crl.pem
|
||||
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
|
||||
rm -rf $(find /home -maxdepth 2 | grep $CLIENT.ovpn) 2>/dev/null
|
||||
rm -rf /root/$CLIENT.ovpn 2>/dev/null
|
||||
rm -f $(find /home -maxdepth 2 | grep $CLIENT.ovpn) 2>/dev/null
|
||||
rm -f /root/$CLIENT.ovpn 2>/dev/null
|
||||
|
||||
echo ""
|
||||
echo "Certificate for client $CLIENT revoked"
|
||||
echo "Exiting..."
|
||||
|
|
@ -155,7 +164,7 @@ if [[ -e /etc/openvpn/server.conf ]]; then
|
|||
;;
|
||||
3)
|
||||
echo ""
|
||||
read -p "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE
|
||||
read -rp "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE
|
||||
if [[ "$REMOVE" = 'y' ]]; then
|
||||
PORT=$(grep '^port ' /etc/openvpn/server.conf | cut -d " " -f 2)
|
||||
if pgrep firewalld; then
|
||||
|
|
@ -213,6 +222,7 @@ else
|
|||
clear
|
||||
echo "Welcome to the secure OpenVPN installer (github.com/Angristan/OpenVPN-install)"
|
||||
echo ""
|
||||
|
||||
# OpenVPN setup and first user creation
|
||||
echo "I need to ask you a few questions before starting the setup"
|
||||
echo "You can leave the default options and just press enter if you are ok with them"
|
||||
|
|
@ -220,15 +230,45 @@ else
|
|||
echo "I need to know the IPv4 address of the network interface you want OpenVPN listening to."
|
||||
echo "If your server is running behind a NAT, (e.g. LowEndSpirit, Scaleway) leave the IP address as it is. (local/private IP)"
|
||||
echo "Otherwise, it should be your public IPv4 address."
|
||||
read -p "IP address: " -e -i $IP IP
|
||||
|
||||
# Autodetect IP address and pre-fill for the user
|
||||
IP=$(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 $IP IP
|
||||
echo ""
|
||||
echo "What port do you want for OpenVPN?"
|
||||
read -p "Port: " -e -i 1194 PORT
|
||||
echo " 1) Default: 1194"
|
||||
echo " 2) Custom"
|
||||
echo " 3) Random [49152-65535]"
|
||||
until [[ "$PORT_CHOICE" =~ ^[1-3]$ ]]; do
|
||||
read -p "Port choice [1-3]: " -e -i 1 PORT_CHOICE
|
||||
done
|
||||
case $PORT_CHOICE in
|
||||
1)
|
||||
PORT="1194"
|
||||
;;
|
||||
2)
|
||||
until [[ "$PORT" =~ ^[0-9]+$ ]] && [ "$PORT" -ge 1 -a "$PORT" -le 65535 ]; do
|
||||
read -p "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"
|
||||
;;
|
||||
esac
|
||||
|
||||
# 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 "This server is behind NAT. What is the public IPv4 address or hostname?"
|
||||
read -rp "Public IP address / hostname: " -e PUBLICIP
|
||||
fi
|
||||
echo ""
|
||||
echo "What protocol do you want for OpenVPN?"
|
||||
echo "Unless UDP is blocked, you should not use TCP (unnecessarily slower)"
|
||||
while [[ $PROTOCOL != "UDP" && $PROTOCOL != "TCP" ]]; do
|
||||
read -p "Protocol [UDP/TCP]: " -e -i UDP PROTOCOL
|
||||
until [[ "$PROTOCOL" == "UDP" || "$PROTOCOL" == "TCP" ]]; do
|
||||
read -rp "Protocol [UDP/TCP]: " -e -i UDP PROTOCOL
|
||||
done
|
||||
echo ""
|
||||
echo "What DNS do you want to use with the VPN?"
|
||||
|
|
@ -241,8 +281,8 @@ else
|
|||
echo " 7) Google (Anycast: worldwide)"
|
||||
echo " 8) Yandex Basic (Russia)"
|
||||
echo " 9) AdGuard DNS (Russia)"
|
||||
while [[ $DNS != "1" && $DNS != "2" && $DNS != "3" && $DNS != "4" && $DNS != "5" && $DNS != "6" && $DNS != "7" && $DNS != "8" ]]; do
|
||||
read -p "DNS [1-8]: " -e -i 1 DNS
|
||||
until [[ "$DNS" =~ ^[0-9]+$ ]] && [ "$DNS" -ge 1 -a "$DNS" -le 9 ]; do
|
||||
read -rp "DNS [1-9]: " -e -i 1 DNS
|
||||
done
|
||||
echo ""
|
||||
echo "See https://github.com/Angristan/OpenVPN-install#encryption to learn more about "
|
||||
|
|
@ -260,8 +300,8 @@ else
|
|||
echo " 5) CAMELLIA-192-CBC"
|
||||
echo " 6) CAMELLIA-256-CBC"
|
||||
echo " 7) SEED-CBC"
|
||||
while [[ $CIPHER != "1" && $CIPHER != "2" && $CIPHER != "3" && $CIPHER != "4" && $CIPHER != "5" && $CIPHER != "6" && $CIPHER != "7" ]]; do
|
||||
read -p "Cipher [1-7]: " -e -i 1 CIPHER
|
||||
until [[ "$CIPHER" =~ ^[0-9]+$ ]] && [ "$CIPHER" -ge 1 -a "$CIPHER" -le 7 ]; do
|
||||
read -rp "Cipher [1-7]: " -e -i 1 CIPHER
|
||||
done
|
||||
case $CIPHER in
|
||||
1)
|
||||
|
|
@ -291,8 +331,8 @@ else
|
|||
echo " 1) 2048 bits (fastest)"
|
||||
echo " 2) 3072 bits (recommended, best compromise)"
|
||||
echo " 3) 4096 bits (most secure)"
|
||||
while [[ $DH_KEY_SIZE != "1" && $DH_KEY_SIZE != "2" && $DH_KEY_SIZE != "3" ]]; do
|
||||
read -p "DH key size [1-3]: " -e -i 2 DH_KEY_SIZE
|
||||
until [[ "$DH_KEY_SIZE" =~ ^[0-9]+$ ]] && [ "$DH_KEY_SIZE" -ge 1 -a "$DH_KEY_SIZE" -le 3 ]; do
|
||||
read -rp "DH key size [1-3]: " -e -i 2 DH_KEY_SIZE
|
||||
done
|
||||
case $DH_KEY_SIZE in
|
||||
1)
|
||||
|
|
@ -310,8 +350,8 @@ else
|
|||
echo " 1) 2048 bits (fastest)"
|
||||
echo " 2) 3072 bits (recommended, best compromise)"
|
||||
echo " 3) 4096 bits (most secure)"
|
||||
while [[ $RSA_KEY_SIZE != "1" && $RSA_KEY_SIZE != "2" && $RSA_KEY_SIZE != "3" ]]; do
|
||||
read -p "RSA key size [1-3]: " -e -i 2 RSA_KEY_SIZE
|
||||
until [[ "$RSA_KEY_SIZE" =~ ^[0-9]+$ ]] && [ "$RSA_KEY_SIZE" -ge 1 -a "$RSA_KEY_SIZE" -le 3 ]; do
|
||||
read -rp "RSA key size [1-3]: " -e -i 2 RSA_KEY_SIZE
|
||||
done
|
||||
case $RSA_KEY_SIZE in
|
||||
1)
|
||||
|
|
@ -328,14 +368,16 @@ else
|
|||
echo "Finally, tell me a name for the client certificate and configuration"
|
||||
while [[ $CLIENT = "" ]]; do
|
||||
echo "Please, use one word only, no special characters"
|
||||
read -p "Client name: " -e -i client CLIENT
|
||||
read -rp "Client name: " -e -i client CLIENT
|
||||
# Remove special characters
|
||||
CLIENT=$(echo $CLIENT | tr -dc '[:alnum:]\n\r')
|
||||
done
|
||||
echo ""
|
||||
echo "Okay, that was all I needed. We are ready to setup your OpenVPN server now"
|
||||
read -n1 -r -p "Press any key to continue..."
|
||||
|
||||
if [[ "$OS" = 'debian' ]]; then
|
||||
apt-get install ca-certificates gpg -y
|
||||
apt-get install ca-certificates gnupg -y
|
||||
# We add the OpenVPN repo to get the latest version.
|
||||
# Debian 7
|
||||
if [[ "$VERSION_ID" = 'VERSION_ID="7"' ]]; then
|
||||
|
|
@ -436,8 +478,8 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
|
|||
echo "Not doing that could cause problems between dependencies, or missing files in repositories."
|
||||
echo ""
|
||||
echo "Continuing will update your installed packages and install needed ones."
|
||||
while [[ $CONTINUE != "y" && $CONTINUE != "n" ]]; do
|
||||
read -p "Continue ? [y/n]: " -e -i y CONTINUE
|
||||
until [[ $CONTINUE == "y" || $CONTINUE == "n" ]]; do
|
||||
read -rp "Continue ? [y/n]: " -e -i y CONTINUE
|
||||
done
|
||||
if [[ "$CONTINUE" = "n" ]]; then
|
||||
echo "Ok, bye !"
|
||||
|
|
@ -470,11 +512,11 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
|
|||
mv ~/EasyRSA-3.0.4/ /etc/openvpn/
|
||||
mv /etc/openvpn/EasyRSA-3.0.4/ /etc/openvpn/easy-rsa/
|
||||
chown -R root:root /etc/openvpn/easy-rsa/
|
||||
rm -rf ~/EasyRSA-3.0.4.tgz
|
||||
cd /etc/openvpn/easy-rsa/
|
||||
rm -f ~/EasyRSA-3.0.4.tgz
|
||||
cd /etc/openvpn/easy-rsa/ || return
|
||||
# Generate a random, alphanumeric identifier of 16 characters for CN and one for server name
|
||||
SERVER_CN="cn_$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)"
|
||||
SERVER_NAME="server_$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)"
|
||||
SERVER_CN="cn_$(tr -dc 'a-zA-Z0-9' < /dev/urandom | fold -w 16 | head -n 1)"
|
||||
SERVER_NAME="server_$(tr -dc 'a-zA-Z0-9' < /dev/urandom | fold -w 16 | head -n 1)"
|
||||
echo "set_var EASYRSA_KEY_SIZE $RSA_KEY_SIZE" > vars
|
||||
echo "set_var EASYRSA_REQ_CN $SERVER_CN" >> vars
|
||||
# Create the PKI, set up the CA, the DH params and the server + client certificates
|
||||
|
|
@ -493,11 +535,7 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
|
|||
|
||||
# Generate server.conf
|
||||
echo "port $PORT" > /etc/openvpn/server.conf
|
||||
if [[ "$PROTOCOL" = 'UDP' ]]; then
|
||||
echo "proto udp" >> /etc/openvpn/server.conf
|
||||
elif [[ "$PROTOCOL" = 'TCP' ]]; then
|
||||
echo "proto tcp" >> /etc/openvpn/server.conf
|
||||
fi
|
||||
echo "proto $(echo $PROTOCOL | tr '[:upper:]' '[:lower:]')" >> /etc/openvpn/server.conf
|
||||
echo "dev tun
|
||||
user nobody
|
||||
group $NOGROUP
|
||||
|
|
@ -510,8 +548,15 @@ 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'
|
||||
fi
|
||||
# Obtain the resolvers from resolv.conf and use them for OpenVPN
|
||||
grep -v '#' /etc/resolv.conf | grep 'nameserver' | grep -E -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | while read line; do
|
||||
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
|
||||
;;
|
||||
|
|
@ -521,6 +566,7 @@ ifconfig-pool-persist ipp.txt" >> /etc/openvpn/server.conf
|
|||
;;
|
||||
3) # 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) # FDN
|
||||
echo 'push "dhcp-option DNS 80.67.169.40"' >> /etc/openvpn/server.conf
|
||||
|
|
@ -547,7 +593,7 @@ ifconfig-pool-persist ipp.txt" >> /etc/openvpn/server.conf
|
|||
echo 'push "dhcp-option DNS 176.103.130.131"' >> /etc/openvpn/server.conf
|
||||
;;
|
||||
esac
|
||||
echo 'push "redirect-gateway def1 bypass-dhcp" '>> /etc/openvpn/server.conf
|
||||
echo 'push "redirect-gateway def1 bypass-dhcp" ' >> /etc/openvpn/server.conf
|
||||
echo "crl-verify crl.pem
|
||||
ca ca.crt
|
||||
cert $SERVER_NAME.crt
|
||||
|
|
@ -572,12 +618,16 @@ verb 3" >> /etc/openvpn/server.conf
|
|||
if ! grep -q "\<net.ipv4.ip_forward\>" $SYSCTL; then
|
||||
echo 'net.ipv4.ip_forward=1' >> $SYSCTL
|
||||
fi
|
||||
|
||||
# Avoid an unneeded reboot
|
||||
echo 1 > /proc/sys/net/ipv4/ip_forward
|
||||
|
||||
# Set NAT for the VPN subnet
|
||||
iptables -t nat -A POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
|
||||
|
||||
# Save persitent iptables rules
|
||||
iptables-save > $IPTABLES
|
||||
|
||||
if pgrep firewalld; then
|
||||
# We don't use --add-service=openvpn because that would only work with
|
||||
# the default port. Using both permanent and not permanent rules to
|
||||
|
|
@ -592,6 +642,7 @@ verb 3" >> /etc/openvpn/server.conf
|
|||
firewall-cmd --zone=trusted --add-source=10.8.0.0/24
|
||||
firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24
|
||||
fi
|
||||
|
||||
if iptables -L -n | grep -qE 'REJECT|DROP'; then
|
||||
# If iptables has at least one REJECT rule, we asume this is needed.
|
||||
# Not the best approach but I can't think of other and this shouldn't
|
||||
|
|
@ -604,8 +655,9 @@ verb 3" >> /etc/openvpn/server.conf
|
|||
iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
|
||||
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
|
||||
# Save persitent OpenVPN rules
|
||||
iptables-save > $IPTABLES
|
||||
iptables-save > $IPTABLES
|
||||
fi
|
||||
|
||||
# If SELinux is enabled and a custom port was selected, we need this
|
||||
if hash sestatus 2>/dev/null; then
|
||||
if sestatus | grep "Current mode" | grep -qs "enforcing"; then
|
||||
|
|
@ -622,6 +674,7 @@ verb 3" >> /etc/openvpn/server.conf
|
|||
fi
|
||||
fi
|
||||
fi
|
||||
|
||||
# And finally, restart OpenVPN
|
||||
if [[ "$OS" = 'debian' ]]; then
|
||||
# Little hack to check for systemd
|
||||
|
|
@ -654,20 +707,12 @@ verb 3" >> /etc/openvpn/server.conf
|
|||
chkconfig openvpn on
|
||||
fi
|
||||
fi
|
||||
# Try to detect a NATed connection and ask about it to potential LowEndSpirit/Scaleway users
|
||||
EXTERNALIP=$(wget -qO- ipv4.icanhazip.com)
|
||||
if [[ "$IP" != "$EXTERNALIP" ]]; then
|
||||
echo ""
|
||||
echo "Looks like your server is behind a NAT!"
|
||||
echo ""
|
||||
echo "If your server is NATed (e.g. LowEndSpirit, Scaleway, or behind a router),"
|
||||
echo "then I need to know the address that can be used to access it from outside."
|
||||
echo "If that's not the case, just ignore this and leave the next field blank"
|
||||
read -p "External IP or domain name: " -e USEREXTERNALIP
|
||||
if [[ "$USEREXTERNALIP" != "" ]]; then
|
||||
IP=$USEREXTERNALIP
|
||||
fi
|
||||
|
||||
# If the server is behind a NAT, use the correct IP address
|
||||
if [[ "$PUBLICIP" != "" ]]; then
|
||||
IP=$PUBLICIP
|
||||
fi
|
||||
|
||||
# client-template.txt is created so we have a template to add further users later
|
||||
echo "client" > /etc/openvpn/client-template.txt
|
||||
if [[ "$PROTOCOL" = 'UDP' ]]; then
|
||||
|
|
|
|||
Loading…
Reference in a new issue