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xiagw 2018-01-08 22:23:11 +08:00
commit 49c09d8f3b
1 changed files with 75 additions and 57 deletions
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132
openvpn-install.sh
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@ -23,10 +23,12 @@ fi
dir_openvpn='/etc/openvpn' dir_openvpn='/etc/openvpn'
dir_easy="${dir_openvpn}/easy-rsa" dir_easy="${dir_openvpn}/easy-rsa"
dir_pki="${dir_easy}/pki" dir_pki="${dir_easy}/pki"
file_index="${dir_pki}/index.txt"
bin_easy="${dir_easy}/easyrsa" bin_easy="${dir_easy}/easyrsa"
file_client_tpl="${dir_openvpn}/client-template.txt" conf_client_tpl="${dir_openvpn}/client-template.txt"
file_openvpn_conf="${dir_openvpn}/server.conf" conf_openvpn="${dir_openvpn}/server.conf"
file_iptables='/etc/sysconfig/iptables.rules' conf_iptables='/etc/sysconfig/iptables.rules'
## function: config the firewall ## function: config the firewall
set_firewall(){ set_firewall(){
@ -46,7 +48,7 @@ echo 1 > /proc/sys/net/ipv4/ip_forward
# Set NAT for the VPN subnet # Set NAT for the VPN subnet
iptables -t nat -A POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE iptables -t nat -A POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
# Save persitent iptables rules # Save persitent iptables rules
iptables-save > $file_iptables iptables-save > $conf_iptables
if pgrep firewalld; then if pgrep firewalld; then
# We don't use --add-service=openvpn because that would only work with # We don't use --add-service=openvpn because that would only work with
# the default port. Using both permanent and not permanent rules to # the default port. Using both permanent and not permanent rules to
@ -64,7 +66,7 @@ if iptables -L -n | grep -qE 'REJECT|DROP'; then
iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
# Save persitent OpenVPN rules # Save persitent OpenVPN rules
iptables-save > $file_iptables iptables-save > $conf_iptables
fi fi
# If SELinux is enabled and a custom port was selected, we need this # If SELinux is enabled and a custom port was selected, we need this
if hash sestatus 2>/dev/null; then if hash sestatus 2>/dev/null; then
@ -83,6 +85,7 @@ fi
## function: generate the new client??.ovpn ## function: generate the new client??.ovpn
generate_newclient() { generate_newclient() {
# Generates the custom client.ovpn
# Where to write the custom client.ovpn? # 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" homeDir="/home/$1"
@ -93,7 +96,7 @@ else # if not SUDO_USER, use /root
fi fi
# Generates the custom client.ovpn # Generates the custom client.ovpn
file_client="$homeDir/$1.ovpn" file_client="$homeDir/$1.ovpn"
cp ${file_client_tpl} ${file_client} cp ${conf_client_tpl} ${file_client}
echo "<ca>" >> ${file_client} echo "<ca>" >> ${file_client}
cat ${dir_pki}/ca.crt >> ${file_client} cat ${dir_pki}/ca.crt >> ${file_client}
echo "</ca>" >> ${file_client} echo "</ca>" >> ${file_client}
@ -107,6 +110,40 @@ echo "key-direction 1" >> ${file_client}
echo "<tls-auth>" >> ${file_client} echo "<tls-auth>" >> ${file_client}
cat ${dir_openvpn}/tls-auth.key >> ${file_client} cat ${dir_openvpn}/tls-auth.key >> ${file_client}
echo "</tls-auth>" >> ${file_client} echo "</tls-auth>" >> ${file_client}
echo ""
echo "Client $1 added, certs available at $homeDir/$1.ovpn"
}
## function: revoke a exist client??.ovpn
revoke_openvpn_client(){
NUMBEROFCLIENTS=$(tail -n +2 ${file_index} | grep -c "^V")
if [[ "$NUMBEROFCLIENTS" = '0' ]]; then
echo ""
echo "You have no existing clients!"
exit 5
fi
echo ""
echo "Select the existing client certificate you want to revoke"
tail -n +2 ${file_index} | grep "^V" | cut -d '=' -f 2 | nl -s ') '
if [[ "$NUMBEROFCLIENTS" = '1' ]]; then
read -p "Select one client [1]: " CLIENTNUMBER
else
read -p "Select one client [1-$NUMBEROFCLIENTS]: " CLIENTNUMBER
fi
CLIENT=$(tail -n +2 ${file_index} | grep "^V" | cut -d '=' -f 2 | sed -n "${CLIENTNUMBER:?empty-var}"p)
cd ${dir_easy}
${bin_easy} --batch revoke $CLIENT
EASYRSA_CRL_DAYS=3650 ${bin_easy} gen-crl
rm -f ${dir_pki}/reqs/$CLIENT.req ${dir_pki}/private/$CLIENT.key ${dir_pki}/issued/$CLIENT.crt
#rm -f ${dir_openvpn}/crl.pem
/bin/cp -f ${dir_pki}/crl.pem ${dir_openvpn}/crl.pem
chmod 644 ${dir_openvpn}/crl.pem
echo ""
echo "Certificate for client $CLIENT revoked"
echo "Exiting..."
} }
## function: install easyrsa 3.0.3 ## function: install easyrsa 3.0.3
@ -130,7 +167,7 @@ rm -rf ~/${file_easy}
} }
## function: install iptables for debian ## function: install iptables for debian
install_ipt_service(){ systemd_ipt_service(){
dir_ipt='/etc/iptables' dir_ipt='/etc/iptables'
file_ipt_svc='/etc/systemd/system/iptables.service' file_ipt_svc='/etc/systemd/system/iptables.service'
@ -138,7 +175,7 @@ file_ipt_sh="${dir_ipt}/flush-iptables.sh"
# Install iptables service # Install iptables service
if [[ ! -e ${file_ipt_svc} ]]; then if [[ ! -e ${file_ipt_svc} ]]; then
mkdir ${dir_ipt} mkdir ${dir_ipt}
iptables-save > ${file_iptables} iptables-save > ${conf_iptables}
echo "#!/bin/sh echo "#!/bin/sh
iptables -F iptables -F
iptables -X iptables -X
@ -157,8 +194,8 @@ Before=network-pre.target
Wants=network-pre.target Wants=network-pre.target
[Service] [Service]
Type=oneshot Type=oneshot
ExecStart=/sbin/iptables-restore ${file_iptables} ExecStart=/sbin/iptables-restore ${conf_iptables}
ExecReload=/sbin/iptables-restore ${file_iptables} ExecReload=/sbin/iptables-restore ${conf_iptables}
ExecStop=/etc/iptables/flush-iptables.sh ExecStop=/etc/iptables/flush-iptables.sh
RemainAfterExit=yes RemainAfterExit=yes
[Install] [Install]
@ -337,18 +374,18 @@ if [[ "$OS" = 'debian' ]]; then
# Ubuntu >= 16.04 and Debian > 8 have OpenVPN > 2.3.3 without the need of a third party repository. # Ubuntu >= 16.04 and Debian > 8 have OpenVPN > 2.3.3 without the need of a third party repository.
## The we install OpenVPN ## The we install OpenVPN
apt-get install openvpn iptables openssl wget ca-certificates curl -y apt-get install openvpn iptables openssl wget ca-certificates curl -y
install_ipt_service ## call function systemd_ipt_service ## call function
elif [[ "$OS" = 'centos7' || "$OS" = 'fedora' ]]; then elif [[ "$OS" = 'centos7' || "$OS" = 'fedora' ]]; then
if [[ "$OS" = 'centos7' ]]; then if [[ "$OS" = 'centos7' ]]; then
yum install epel-release -y yum install epel-release -y
fi fi
yum --enablerepo=epel install openvpn iptables openssl wget ca-certificates curl -y yum --enablerepo=epel install openvpn iptables openssl wget ca-certificates curl -y
# install_ipt_service ## call function # systemd_ipt_service ## call function
read -p "Please manually set the firewall,press anykey continue" read -p "Please manually set the firewall,press anykey continue"
elif [[ "$OS" = 'centos6' ]]; then elif [[ "$OS" = 'centos6' ]]; then
yum install epel-release -y yum install epel-release -y
yum --enablerepo=epel install openvpn iptables openssl wget ca-certificates curl -y yum --enablerepo=epel install openvpn iptables openssl wget ca-certificates curl -y
# install_ipt_service ## call function # systemd_ipt_service ## call function
read -p "Please manually set the firewall,press anykey continue" read -p "Please manually set the firewall,press anykey continue"
else else
# Else, the distro is ArchLinux # Else, the distro is ArchLinux
@ -369,7 +406,7 @@ else
if [[ "$OS" = 'arch' ]]; then if [[ "$OS" = 'arch' ]]; then
# Install dependencies # Install dependencies
pacman -Syu openvpn iptables openssl wget ca-certificates curl --needed --noconfirm pacman -Syu openvpn iptables openssl wget ca-certificates curl --needed --noconfirm
iptables-save > ${file_iptables} # iptables won't start if this file does not exist iptables-save > ${conf_iptables} # iptables won't start if this file does not exist
systemctl daemon-reload systemctl daemon-reload
systemctl enable iptables systemctl enable iptables
systemctl start iptables systemctl start iptables
@ -414,12 +451,13 @@ topology subnet
server 10.8.0.0 255.255.255.0 server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt ifconfig-pool-persist ipp.txt
#client-config-dir ccd #client-config-dir ccd
#route 10.8.0.0 255.255.255.252" >> ${file_openvpn_conf} #route 10.8.0.0 255.255.255.252" >> ${conf_openvpn}
# DNS resolvers # DNS resolvers
case $DNS in case $DNS in
1) 1)
# Obtain the resolvers from resolv.conf and use them for OpenVPN # 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 '#' /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
echo "push \"dhcp-option DNS $line\"" echo "push \"dhcp-option DNS $line\""
done done
;; ;;
@ -450,8 +488,8 @@ case $DNS in
echo 'push "dhcp-option DNS 176.103.130.130"' echo 'push "dhcp-option DNS 176.103.130.130"'
echo 'push "dhcp-option DNS 176.103.130.131"' echo 'push "dhcp-option DNS 176.103.130.131"'
;; ;;
esac >> ${file_openvpn_conf} esac >> ${conf_openvpn}
echo 'push "redirect-gateway def1 bypass-dhcp" '>> ${file_openvpn_conf} echo 'push "redirect-gateway def1 bypass-dhcp" '>> ${conf_openvpn}
echo "client-to-client echo "client-to-client
crl-verify crl.pem crl-verify crl.pem
ca ca.crt ca ca.crt
@ -467,7 +505,7 @@ tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
status openvpn-status.log status openvpn-status.log
log openvpn.log log openvpn.log
log-append openvpn.log log-append openvpn.log
verb 3" >> ${file_openvpn_conf} verb 3" >> ${conf_openvpn}
set_firewall ## call function set_firewall ## call function
@ -520,11 +558,11 @@ if [[ "$IP" != "$EXTERNALIP" ]]; then
fi fi
# client-template.txt is created so we have a template to add further users later # client-template.txt is created so we have a template to add further users later
echo "client" > ${file_client_tpl} echo "client" > ${conf_client_tpl}
if [[ "$PROTOCOL" = 'udp' ]]; then if [[ "$PROTOCOL" = 'udp' ]]; then
echo "proto ${PROTOCOL}" >> ${file_client_tpl} echo "proto ${PROTOCOL}" >> ${conf_client_tpl}
elif [[ "$PROTOCOL" = 'tcp' ]]; then elif [[ "$PROTOCOL" = 'tcp' ]]; then
echo "proto ${PROTOCOL}-client" >> ${file_client_tpl} echo "proto ${PROTOCOL}-client" >> ${conf_client_tpl}
fi fi
echo "remote $IP $PORT echo "remote $IP $PORT
dev tun dev tun
@ -540,7 +578,7 @@ tls-client
tls-version-min 1.2 tls-version-min 1.2
tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256 tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
setenv opt block-outside-dns setenv opt block-outside-dns
verb 3" >> ${file_client_tpl} verb 3" >> ${conf_client_tpl}
# call function Generate the custom client.ovpn # call function Generate the custom client.ovpn
generate_newclient "$CLIENT" generate_newclient "$CLIENT"
@ -557,8 +595,8 @@ remove_openvpn(){
echo "" echo ""
read -p "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE read -p "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE
if [[ 'y' = "$REMOVE" ]]; then if [[ 'y' = "$REMOVE" ]]; then
PORT=$(grep '^port ' ${file_openvpn_conf} | cut -d " " -f 2) PORT=$(grep '^port ' ${conf_openvpn} | cut -d " " -f 2)
PROTOCOL=$(grep '^proto ' ${file_openvpn_conf} | cut -d " " -f 2) PROTOCOL=$(grep '^proto ' ${conf_openvpn} | cut -d " " -f 2)
if pgrep firewalld; then if pgrep firewalld; then
# Using both permanent and not permanent rules to avoid a firewalld reload. # Using both permanent and not permanent rules to avoid a firewalld reload.
firewall-cmd --zone=public --remove-port=$PORT/${PROTOCOL} firewall-cmd --zone=public --remove-port=$PORT/${PROTOCOL}
@ -569,10 +607,10 @@ if [[ 'y' = "$REMOVE" ]]; then
if iptables -L -n | grep -qE 'REJECT|DROP'; then if iptables -L -n | grep -qE 'REJECT|DROP'; then
iptables -D INPUT -p ${PROTOCOL} --dport $PORT -j ACCEPT iptables -D INPUT -p ${PROTOCOL} --dport $PORT -j ACCEPT
iptables -D FORWARD -s 10.8.0.0/24 -j ACCEPT iptables -D FORWARD -s 10.8.0.0/24 -j ACCEPT
iptables-save > $file_iptables iptables-save > $conf_iptables
fi fi
iptables -t nat -D POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE iptables -t nat -D POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
iptables-save > $file_iptables iptables-save > $conf_iptables
if hash sestatus 2>/dev/null; then if hash sestatus 2>/dev/null; then
if sestatus | grep "Current mode" | grep -qs "enforcing"; then if sestatus | grep "Current mode" | grep -qs "enforcing"; then
if [[ "$PORT" != '1194' ]]; then if [[ "$PORT" != '1194' ]]; then
@ -581,9 +619,16 @@ if [[ 'y' = "$REMOVE" ]]; then
fi fi
fi fi
if [[ "$OS" = 'debian' ]]; then if [[ "$OS" = 'debian' ]]; then
systemctl stop openvpn@server
apt-get autoremove --purge -y openvpn apt-get autoremove --purge -y openvpn
elif [[ "$OS" = 'arch' ]]; then elif [[ "$OS" = 'arch' ]]; then
pacman -R openvpn --noconfirm pacman -R openvpn --noconfirm
elif [[ "$OS" = 'centos7' ]]; then
systemctl stop openvpn@server
yum remove openvpn -y
elif [[ "$OS" = 'centos6' ]]; then
/etc/init.d/openvpn stop
yum remove openvpn -y
else else
yum remove openvpn -y yum remove openvpn -y
fi fi
@ -613,7 +658,7 @@ What do you want to do?
3) Remove OpenVPN 3) Remove OpenVPN
4) Exit 4) Exit
EOF EOF
file_index="${dir_pki}/index.txt"
read -p 'Select an option [1-4]: ' option read -p 'Select an option [1-4]: ' option
case $option in case $option in
1) 1)
@ -625,38 +670,11 @@ EOF
read -p "Client name: " -e -i client CLIENT read -p "Client name: " -e -i client CLIENT
cd ${dir_easy} cd ${dir_easy}
${bin_easy} build-client-full $CLIENT nopass ${bin_easy} build-client-full $CLIENT nopass
# Generates the custom client.ovpn
generate_newclient "$CLIENT" generate_newclient "$CLIENT"
echo ""
echo "Client $CLIENT added, certs available at $homeDir/$CLIENT.ovpn"
exit exit
;; ;;
2) 2)
NUMBEROFCLIENTS=$(tail -n +2 ${file_index} | grep -c "^V") revoke_openvpn_client ## call function
if [[ "$NUMBEROFCLIENTS" = '0' ]]; then
echo ""
echo "You have no existing clients!"
exit 5
fi
echo ""
echo "Select the existing client certificate you want to revoke"
tail -n +2 ${file_index} | grep "^V" | cut -d '=' -f 2 | nl -s ') '
if [[ "$NUMBEROFCLIENTS" = '1' ]]; then
read -p "Select one client [1]: " CLIENTNUMBER
else
read -p "Select one client [1-$NUMBEROFCLIENTS]: " CLIENTNUMBER
fi
CLIENT=$(tail -n +2 ${file_index} | grep "^V" | cut -d '=' -f 2 | sed -n "${CLIENTNUMBER:?empty-var}"p)
cd ${dir_easy}
${bin_easy} --batch revoke $CLIENT
EASYRSA_CRL_DAYS=3650 ${bin_easy} gen-crl
rm -f ${dir_pki}/reqs/$CLIENT.req ${dir_pki}/private/$CLIENT.key ${dir_pki}/issued/$CLIENT.crt
#rm -f ${dir_openvpn}/crl.pem
/bin/cp -f ${dir_pki}/crl.pem ${dir_openvpn}/crl.pem
chmod 644 ${dir_openvpn}/crl.pem
echo ""
echo "Certificate for client $CLIENT revoked"
echo "Exiting..."
exit exit
;; ;;
3) 3)
@ -737,7 +755,7 @@ detect_os_ver ## call function
detect_IP_NIC ## call function detect_IP_NIC ## call function
## OpenVPN setup and first user creation ## OpenVPN setup and first user creation
if [[ -e ${file_openvpn_conf} ]]; then if [[ -e ${conf_openvpn} ]]; then
config_openvpn ## call function config_openvpn ## call function
else else
install_openvpn ## call function install_openvpn ## call function