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CentOS support and other improvements
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Nyr
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@ -1,7 +1,7 @@
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##openvpn-install
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OpenVPN [road warrior](http://en.wikipedia.org/wiki/Road_warrior_%28computing%29) installer for Debian-based distros.
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OpenVPN [road warrior](http://en.wikipedia.org/wiki/Road_warrior_%28computing%29) installer for Debian, Ubuntu and CentOS.
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This script will let you setup your own VPN server in no more than one minute, even if you haven't used OpenVPN before. It isn't bulletproof but it has been designed to be as unobtrusive and universal as possible.
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This script will let you setup your own VPN server in no more than a minute, even if you haven't used OpenVPN before. It isn't bulletproof but has been designed to be as unobtrusive and universal as possible.
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###Installation
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Run the script and follow the assistant:
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@ -17,4 +17,4 @@ If you don't care about sharing an IP address with more people, check out the aw
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###Donations
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If you want to show your appreciation for the time saved, you can donate via [PayPal](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=VBAYDL34Z7J6L) or [Bitcoin](https://www.coinbase.com/Nyr). Thanks!
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If you want to show your appreciation, you can donate via [PayPal](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=VBAYDL34Z7J6L) or [Bitcoin](https://www.coinbase.com/Nyr). Thanks!
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@ -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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fi
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echo ""
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echo "Certificate for client $CLIENT revoked"
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fi
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exit
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;;
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3)
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echo ""
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read -p "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE
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if [[ "$REMOVE" = 'y' ]]; then
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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' $RCLOCAL
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echo ""
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echo "OpenVPN removed!"
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else
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@ -158,17 +183,19 @@ else
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echo ""
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echo "Okay, that was all I needed. We are ready to setup your OpenVPN server now"
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read -n1 -r -p "Press any key to continue..."
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if [[ "$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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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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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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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" $RCLOCAL
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fi
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# Enable net.ipv4.ip_forward for the system
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if [[ "$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" $RCLOCAL
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fi
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# And finally, restart OpenVPN
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if [[ "$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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