mirror of
https://github.com/angristan/openvpn-install.git
synced 2025-12-06 12:42:41 +01:00
CentOS support and other improvements
This commit is contained in:
Nyr
@@ -1,9 +1,11 @@
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#!/bin/bash
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# OpenVPN road warrior installer for Debian-based distros
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# OpenVPN road warrior installer for Debian, Ubuntu and CentOS
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# This script will only work on Debian-based systems. It isn't bulletproof but
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# it will probably work if you simply want to setup a VPN on your Debian/Ubuntu
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# VPS. It has been designed to be as unobtrusive and universal as possible.
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# This script will work on Debian, Ubuntu, CentOS and probably other distros
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# of the same families, although no support is offered for them. It isn't
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# bulletproof but it will probably work if you simply want to setup a VPN on
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# your Debian/Ubuntu/CentOS box. It has been designed to be as unobtrusive and
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# universal as possible.
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if [[ "$USER" != 'root' ]]; then
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@@ -18,14 +20,27 @@ if [[ ! -e /dev/net/tun ]]; then
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fi
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if [[ ! -e /etc/debian_version ]]; then
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echo "Looks like you aren't running this installer on a Debian-based system"
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if grep -q "CentOS release 5" "/etc/redhat-release"; then
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echo "CentOS 5 is too old and not supported"
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exit
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fi
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if [[ -e /etc/debian_version ]]; then
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OS=debian
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RCLOCAL='/etc/rc.local'
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elif [[ -e /etc/centos-release || -e /etc/redhat-release ]]; then
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OS=centos
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RCLOCAL='/etc/rc.d/rc.local'
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# Needed for CentOS 7
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chmod +x /etc/rc.d/rc.local
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else
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echo "Looks like you aren't running this installer on a Debian, Ubuntu or CentOS system"
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exit
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fi
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newclient () {
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# Generates the client.ovpn
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cp /usr/share/doc/openvpn/examples/sample-config-files/client.conf ~/$1.ovpn
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cp /usr/share/doc/openvpn*/*ample*/sample-config-files/client.conf ~/$1.ovpn
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sed -i "/ca ca.crt/d" ~/$1.ovpn
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sed -i "/cert client.crt/d" ~/$1.ovpn
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sed -i "/key client.key/d" ~/$1.ovpn
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@@ -40,11 +55,20 @@ newclient () {
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echo "</key>" >> ~/$1.ovpn
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}
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geteasyrsa () {
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wget --no-check-certificate -O ~/easy-rsa.tar.gz https://github.com/OpenVPN/easy-rsa/archive/2.2.2.tar.gz
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tar xzf ~/easy-rsa.tar.gz -C ~/
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mkdir -p /etc/openvpn/easy-rsa/2.0/
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cp ~/easy-rsa-2.2.2/easy-rsa/2.0/* /etc/openvpn/easy-rsa/2.0/
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rm -rf ~/easy-rsa-2.2.2
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rm -rf ~/easy-rsa.tar.gz
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}
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# Try to get our IP from the system and fallback to the Internet.
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# I do this to make the script compatible with NATed servers (lowendspirit.com)
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# and to avoid getting an IPv6.
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IP=$(ifconfig | grep 'inet addr:' | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d: -f2 | awk '{ print $1}' | head -1)
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IP=$(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)
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if [[ "$IP" = "" ]]; then
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IP=$(wget -qO- ipv4.icanhazip.com)
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fi
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@@ -89,26 +113,27 @@ if [[ -e /etc/openvpn/server.conf ]]; then
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. /etc/openvpn/easy-rsa/2.0/vars
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. /etc/openvpn/easy-rsa/2.0/revoke-full $CLIENT
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# If it's the first time revoking a cert, we need to add the crl-verify line
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if grep -q "crl-verify" "/etc/openvpn/server.conf"; then
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echo ""
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echo "Certificate for client $CLIENT revoked"
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else
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if ! grep -q "crl-verify" "/etc/openvpn/server.conf"; then
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echo "crl-verify /etc/openvpn/easy-rsa/2.0/keys/crl.pem" >> "/etc/openvpn/server.conf"
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/etc/init.d/openvpn restart
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echo ""
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echo "Certificate for client $CLIENT revoked"
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fi
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echo ""
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echo "Certificate for client $CLIENT revoked"
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exit
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;;
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3)
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echo ""
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read -p "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE
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if [[ "$REMOVE" = 'y' ]]; then
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apt-get remove --purge -y openvpn openvpn-blacklist
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if [[ "$OS" = 'debian' ]]; then
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apt-get remove --purge -y openvpn openvpn-blacklist
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else
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yum remove openvpn -y
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fi
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rm -rf /etc/openvpn
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rm -rf /usr/share/doc/openvpn
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sed -i '/--dport 53 -j REDIRECT --to-port/d' /etc/rc.local
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sed -i '/iptables -t nat -A POSTROUTING -s 10.8.0.0/d' /etc/rc.local
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rm -rf /usr/share/doc/openvpn*
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sed -i '/--dport 53 -j REDIRECT --to-port/d' $RCLOCAL
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sed -i '/iptables -t nat -A POSTROUTING -s 10.8.0.0/d' $RCLOCAL
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echo ""
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echo "OpenVPN removed!"
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else
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@@ -158,17 +183,19 @@ else
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echo ""
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echo "Okay, that was all I needed. We are ready to setup your OpenVPN server now"
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read -n1 -r -p "Press any key to continue..."
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apt-get update
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apt-get install openvpn iptables openssl -y
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cp -R /usr/share/doc/openvpn/examples/easy-rsa/ /etc/openvpn
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# easy-rsa isn't available by default for Debian Jessie and newer
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if [[ ! -d /etc/openvpn/easy-rsa/2.0/ ]]; then
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wget --no-check-certificate -O ~/easy-rsa.tar.gz https://github.com/OpenVPN/easy-rsa/archive/2.2.2.tar.gz
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tar xzf ~/easy-rsa.tar.gz -C ~/
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mkdir -p /etc/openvpn/easy-rsa/2.0/
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cp ~/easy-rsa-2.2.2/easy-rsa/2.0/* /etc/openvpn/easy-rsa/2.0/
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rm -rf ~/easy-rsa-2.2.2
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rm -rf ~/easy-rsa.tar.gz
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if [[ "$OS" = 'debian' ]]; then
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apt-get update
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apt-get install openvpn iptables openssl -y
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cp -R /usr/share/doc/openvpn/examples/easy-rsa/ /etc/openvpn
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# easy-rsa isn't available by default for Debian Jessie and newer
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if [[ ! -d /etc/openvpn/easy-rsa/2.0/ ]]; then
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geteasyrsa
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fi
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else
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# Else, the distro is CentOS
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yum install epel-release -y
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yum install openvpn iptables openssl wget -y
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geteasyrsa
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fi
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cd /etc/openvpn/easy-rsa/2.0/
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# Let's fix one thing first...
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@@ -193,8 +220,10 @@ else
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# DH params
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. /etc/openvpn/easy-rsa/2.0/build-dh
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# Let's configure the server
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cd /usr/share/doc/openvpn/examples/sample-config-files
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gunzip -d server.conf.gz
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cd /usr/share/doc/openvpn*/*ample*/sample-config-files
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if [[ "$OS" = 'debian' ]]; then
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gunzip -d server.conf.gz
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fi
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cp server.conf /etc/openvpn/
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cd /etc/openvpn/easy-rsa/2.0/keys
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cp ca.crt ca.key dh2048.pem server.crt server.key /etc/openvpn
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@@ -234,22 +263,42 @@ else
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# Listen at port 53 too if user wants that
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if [[ "$ALTPORT" = 'y' ]]; then
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iptables -t nat -A PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-port $PORT
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sed -i "1 a\iptables -t nat -A PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-port $PORT" /etc/rc.local
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sed -i "1 a\iptables -t nat -A PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-port $PORT" $RCLOCAL
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fi
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# Enable net.ipv4.ip_forward for the system
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sed -i 's|#net.ipv4.ip_forward=1|net.ipv4.ip_forward=1|' /etc/sysctl.conf
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if [[ "$OS" = 'debian' ]]; then
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sed -i 's|#net.ipv4.ip_forward=1|net.ipv4.ip_forward=1|' /etc/sysctl.conf
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else
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# CentOS 5 and 6
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sed -i 's|net.ipv4.ip_forward = 0|net.ipv4.ip_forward = 1|' /etc/sysctl.conf
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# CentOS 7
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if ! grep -q "net.ipv4.ip_forward=1" "/etc/sysctl.conf"; then
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echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf
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fi
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fi
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# Avoid an unneeded reboot
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echo 1 > /proc/sys/net/ipv4/ip_forward
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# Set iptables
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if [[ "$INTERNALNETWORK" = 'y' ]]; then
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iptables -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
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sed -i "1 a\iptables -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP" /etc/rc.local
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sed -i "1 a\iptables -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP" $RCLOCAL
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else
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iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -j SNAT --to $IP
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sed -i "1 a\iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -j SNAT --to $IP" /etc/rc.local
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sed -i "1 a\iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -j SNAT --to $IP" $RCLOCAL
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fi
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# And finally, restart OpenVPN
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/etc/init.d/openvpn restart
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if [[ "$OS" = 'debian' ]]; then
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/etc/init.d/openvpn restart
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else
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# Little hack to check for systemd
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if pidof systemd; then
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systemctl restart openvpn@server.service
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systemctl enable openvpn@server.service
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else
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service openvpn restart
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chkconfig openvpn on
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fi
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fi
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# Try to detect a NATed connection and ask about it to potential LowEndSpirit
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# users
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EXTERNALIP=$(wget -qO- ipv4.icanhazip.com)
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@@ -266,7 +315,7 @@ else
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fi
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# IP/port set on the default client.conf so we can add further users
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# without asking for them
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sed -i "s|remote my-server-1 1194|remote $IP $PORT|" /usr/share/doc/openvpn/examples/sample-config-files/client.conf
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sed -i "s|remote my-server-1 1194|remote $IP $PORT|" /usr/share/doc/openvpn*/*ample*/sample-config-files/client.conf
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# Generate the client.ovpn
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newclient "$CLIENT"
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echo ""
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