mirror of
https://github.com/Nyr/openvpn-install.git
synced 2025-04-05 05:33:30 +03:00
multi os support
This commit is contained in:
Gizem Gur
parent
582a062f2f
commit
11fc8bbf89
1 changed files with 395 additions and 247 deletions
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@ -1,161 +1,203 @@
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#!/bin/bash
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# OpenVPN road warrior installer for Debian and Ubuntu
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if grep -qs "14.04" /etc/os-release; then
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echo "Ubuntu 14.04 is too old and not supported"
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exit
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fi
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if grep -qs "jessie" /etc/os-release; then
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echo "Debian 8 is too old and not supported"
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exit
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fi
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if grep -qs "CentOS release 6" /etc/redhat-release; then
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echo "CentOS 6 is too old and not supported"
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exit
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fi
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if grep -qs "Ubuntu 16.04" /etc/os-release; then
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echo 'Ubuntu 16.04 is no longer supported in the current version of openvpn-install
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Use an older version if Ubuntu 16.04 support is needed: https://git.io/vpn1604'
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exit
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fi
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# Detect Debian users running the script with "sh" instead of bash
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if readlink /proc/$$/exe | grep -qs "dash"; then
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if readlink /proc/$$/exe | grep -q "dash"; then
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echo "This script needs to be run with bash, not sh"
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exit 1
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exit
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fi
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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 2
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exit
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fi
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if [[ ! -e /dev/net/tun ]]; then
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echo "The TUN device is not available
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You need to enable TUN before running this script"
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exit 3
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exit
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fi
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if ! iptables -t nat -nL &>/dev/null; then
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echo "Unable to initialize the iptables/netfilter NAT table, setup can't continue.
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Make sure that your system has iptables/netfilter available.
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If using OpenVZ, ask your provider to enable full netfilter support."
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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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GROUPNAME=nogroup
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RCLOCAL='/etc/rc.local'
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os="debian"
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group_name="nogroup"
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elif [[ -e /etc/centos-release || -e /etc/redhat-release ]]; then
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os="centos"
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group_name="nobody"
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elif grep -qs "Amazon Linux" /etc/system-release; then
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os="amazon-linux"
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group_name="nobody"
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else
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echo "Looks like you aren't running this installer on Debian or Ubuntu"
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exit 5
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echo "Looks like you aren't running this installer on Debian, Ubuntu, CentOS or Amazon Linux"
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exit
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fi
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newclient () {
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new_client () {
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# Generates the custom client.ovpn
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cp /etc/openvpn/client-common.txt ~/$1.ovpn
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echo "<ca>" >> ~/$1.ovpn
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cat /etc/openvpn/easy-rsa/pki/ca.crt >> ~/$1.ovpn
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echo "</ca>" >> ~/$1.ovpn
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echo "<cert>" >> ~/$1.ovpn
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cat /etc/openvpn/easy-rsa/pki/issued/$1.crt >> ~/$1.ovpn
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echo "</cert>" >> ~/$1.ovpn
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echo "<key>" >> ~/$1.ovpn
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cat /etc/openvpn/easy-rsa/pki/private/$1.key >> ~/$1.ovpn
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echo "</key>" >> ~/$1.ovpn
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echo "<tls-auth>" >> ~/$1.ovpn
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cat /etc/openvpn/ta.key >> ~/$1.ovpn
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echo "</tls-auth>" >> ~/$1.ovpn
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useradd $1
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google-authenticator -t -d -r3 -R30 -f -l $1-vpn -s /etc/openvpn/google-authenticator/$1
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chown gauth. /etc/openvpn/google-authenticator/$1
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{
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cat /etc/openvpn/server/client-common.txt
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echo "<ca>"
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cat /etc/openvpn/server/easy-rsa/pki/ca.crt
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echo "</ca>"
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echo "<cert>"
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sed -ne '/BEGIN CERTIFICATE/,$ p' /etc/openvpn/server/easy-rsa/pki/issued/"$1".crt
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echo "</cert>"
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echo "<key>"
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cat /etc/openvpn/server/easy-rsa/pki/private/"$1".key
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echo "</key>"
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echo "<tls-crypt>"
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sed -ne '/BEGIN OpenVPN Static key/,$ p' /etc/openvpn/server/tc.key
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echo "</tls-crypt>"
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} > ~/"$1".ovpn
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useradd $1
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google-authenticator -t -d -r3 -R30 -f -l $1-vpn -s /etc/openvpn/google-authenticator/$1
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chown gauth. /etc/openvpn/google-authenticator/$1
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}
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# Try to get our IP from the system and fallback to the Internet.
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# I do this to make the script compatible with NATed servers (lowendspirit.com)
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# and to avoid getting an IPv6.
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IP=$(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 -4qO- "http://whatismyip.akamai.com/")
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fi
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if [[ -e /etc/openvpn/server.conf ]]; then
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if [[ -e /etc/openvpn/server/server.conf ]]; then
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while :
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do
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clear
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echo "Looks like OpenVPN is already installed"
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echo ""
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echo "Looks like OpenVPN is already installed."
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echo
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echo "What do you want to do?"
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echo " 1) Add a new user"
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echo " 2) Revoke an existing user"
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echo " 3) Remove OpenVPN"
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echo " 4) Exit"
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read -p "Select an option [1-4]: " option
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case $option in
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read -p "Select an option: " option
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until [[ "$option" =~ ^[1-4]$ ]]; do
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echo "$option: invalid selection."
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read -p "Select an option: " option
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done
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case "$option" in
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1)
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echo ""
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echo "Tell me a name for the client certificate"
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echo "Please, use one word only, no special characters"
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read -p "Client name: " -e -i client CLIENT
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cd /etc/openvpn/easy-rsa/
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./easyrsa build-client-full $CLIENT nopass
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echo
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echo "Tell me a name for the client certificate."
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read -p "Client name: " unsanitized_client
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client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
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while [[ -z "$client" || -e /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt ]]; do
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echo "$client: invalid client name."
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read -p "Client name: " unsanitized_client
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client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
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done
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cd /etc/openvpn/server/easy-rsa/
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EASYRSA_CERT_EXPIRE=3650 ./easyrsa build-client-full "$client" nopass
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# Generates the custom client.ovpn
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newclient "$CLIENT"
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echo ""
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echo "Client $CLIENT added, configuration is available at" ~/"$CLIENT.ovpn"
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new_client "$client"
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echo
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echo "Client $client added, configuration is available at:" ~/"$client.ovpn"
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exit
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;;
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2)
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# This option could be documented a bit better and maybe even be simplified
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# ...but what can I say, I want some sleep too
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NUMBEROFCLIENTS=$(tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep -c "^V")
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if [[ "$NUMBEROFCLIENTS" = '0' ]]; then
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echo ""
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number_of_clients=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep -c "^V")
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if [[ "$number_of_clients" = 0 ]]; then
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echo
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echo "You have no existing clients!"
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exit 6
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exit
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fi
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echo ""
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echo "Select the existing client certificate you want to revoke"
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tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') '
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if [[ "$NUMBEROFCLIENTS" = '1' ]]; then
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read -p "Select one client [1]: " CLIENTNUMBER
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echo
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echo "Select the existing client certificate you want to revoke:"
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tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') '
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read -p "Select one client: " client_number
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until [[ "$client_number" =~ ^[0-9]+$ && "$client_number" -le "$number_of_clients" ]]; do
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echo "$client_number: invalid selection."
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read -p "Select one client: " client_number
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done
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client=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$client_number"p)
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echo
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read -p "Do you really want to revoke access for client $client? [y/N]: " revoke
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until [[ "$revoke" =~ ^[yYnN]*$ ]]; do
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echo "$revoke: invalid selection."
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read -p "Do you really want to revoke access for client $client? [y/N]: " revoke
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done
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if [[ "$revoke" =~ ^[yY]$ ]]; then
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cd /etc/openvpn/server/easy-rsa/
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./easyrsa --batch revoke "$client"
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EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
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rm -f pki/reqs/"$client".req
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rm -f pki/private/"$client".key
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rm -f pki/issued/"$client".crt
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rm -f /etc/openvpn/server/crl.pem
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cp /etc/openvpn/server/easy-rsa/pki/crl.pem /etc/openvpn/server/crl.pem
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# CRL is read with each client connection, when OpenVPN is dropped to nobody
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chown nobody:"$group_name" /etc/openvpn/server/crl.pem
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echo
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echo "Certificate for client $client revoked!"
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else
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read -p "Select one client [1-$NUMBEROFCLIENTS]: " CLIENTNUMBER
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echo
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echo "Certificate revocation for client $client aborted!"
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fi
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CLIENT=$(tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$CLIENTNUMBER"p)
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cd /etc/openvpn/easy-rsa/
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./easyrsa --batch revoke $CLIENT
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EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
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rm -rf pki/reqs/$CLIENT.req
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rm -rf pki/private/$CLIENT.key
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rm -rf pki/issued/$CLIENT.crt
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rm -rf /etc/openvpn/crl.pem
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userdel $CLIENT
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rm -rf /etc/openvpn/google-authenticator/$CLIENT
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cp /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn/crl.pem
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# CRL is read with each client connection, when OpenVPN is dropped to nobody
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chown nobody:$GROUPNAME /etc/openvpn/crl.pem
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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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PORT=$(grep '^port ' /etc/openvpn/server.conf | cut -d " " -f 2)
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PROTOCOL=$(grep '^proto ' /etc/openvpn/server.conf | cut -d " " -f 2)
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echo
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read -p "Do you really want to remove OpenVPN? [y/N]: " remove
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until [[ "$remove" =~ ^[yYnN]*$ ]]; do
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echo "$remove: invalid selection."
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read -p "Do you really want to remove OpenVPN? [y/N]: " remove
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done
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if [[ "$remove" =~ ^[yY]$ ]]; then
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port=$(grep '^port ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
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protocol=$(grep '^proto ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
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if pgrep firewalld; then
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IP=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.8.0.0/24 '"'"'!'"'"' -d 10.8.0.0/24 -j SNAT --to ' | cut -d " " -f 10)
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ip=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.8.0.0/24 '"'"'!'"'"' -d 10.8.0.0/24 -j SNAT --to ' | cut -d " " -f 10)
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# Using both permanent and not permanent rules to avoid a firewalld reload.
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firewall-cmd --zone=public --remove-port=$PORT/$PROTOCOL
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firewall-cmd --remove-port="$port"/"$protocol"
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firewall-cmd --zone=trusted --remove-source=10.8.0.0/24
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firewall-cmd --permanent --zone=public --remove-port=$PORT/$PROTOCOL
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firewall-cmd --permanent --remove-port="$port"/"$protocol"
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firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24
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firewall-cmd --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
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firewall-cmd --permanent --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
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firewall-cmd --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip"
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firewall-cmd --permanent --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip"
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else
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IP=$(grep 'iptables -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to ' $RCLOCAL | cut -d " " -f 14)
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iptables -t nat -D POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
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sed -i '/iptables -t nat -A POSTROUTING -s 10.8.0.0\/24 ! -d 10.8.0.0\/24 -j SNAT --to /d' $RCLOCAL
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if iptables -L -n | grep -qE '^ACCEPT'; then
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iptables -D INPUT -p $PROTOCOL --dport $PORT -j ACCEPT
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iptables -D FORWARD -s 10.8.0.0/24 -j ACCEPT
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iptables -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
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sed -i "/iptables -I INPUT -p $PROTOCOL --dport $PORT -j ACCEPT/d" $RCLOCAL
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sed -i "/iptables -I FORWARD -s 10.8.0.0\/24 -j ACCEPT/d" $RCLOCAL
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sed -i "/iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT/d" $RCLOCAL
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fi
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systemctl disable --now openvpn-iptables.service
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rm -f /etc/systemd/system/openvpn-iptables.service
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fi
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if hash sestatus 2>/dev/null; then
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if sestatus | grep "Current mode" | grep -qs "enforcing"; then
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if [[ "$PORT" != '1194' || "$PROTOCOL" = 'tcp' ]]; then
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semanage port -d -t openvpn_port_t -p $PROTOCOL $PORT
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fi
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fi
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if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 1194 ]]; then
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semanage port -d -t openvpn_port_t -p "$protocol" "$port"
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fi
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apt-get remove --purge -y openvpn libpam-google-authenticator
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rm -rf /etc/openvpn
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echo ""
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systemctl disable --now openvpn-server@server.service
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rm -rf /etc/openvpn/server
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rm -f /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
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rm -f /etc/sysctl.d/30-openvpn-forward.conf
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if [[ "$os" = "debian" ]]; then
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apt-get remove --purge -y openvpn
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else
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yum remove openvpn -y
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fi
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echo
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echo "OpenVPN removed!"
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else
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echo ""
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echo
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echo "Removal aborted!"
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fi
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exit
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@ -165,210 +207,317 @@ if [[ -e /etc/openvpn/server.conf ]]; then
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done
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else
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clear
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echo 'Welcome to this quick OpenVPN "road warrior" installer'
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echo ""
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# OpenVPN setup and first user creation
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echo "I need to ask you a few questions before starting the setup"
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echo "You can leave the default options and just press enter if you are ok with them"
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echo ""
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echo "First I need to know the IPv4 address of the network interface you want OpenVPN"
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echo "listening to."
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read -p "IP address: " -e -i $IP IP
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echo ""
|
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echo "Welcome to this OpenVPN "road warrior" installer!"
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echo
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echo "I need to ask you a few questions before starting setup."
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echo "You can use the default options and just press enter if you are ok with them."
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# If system has a single IPv4, it is selected automatically. Else, ask the user
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if [[ $(ip addr | grep inet | grep -v inet6 | grep -vEc '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}') -eq 1 ]]; then
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ip=$(ip addr | grep inet | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')
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else
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number_of_ips=$(ip addr | grep inet | grep -v inet6 | grep -vEc '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')
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echo
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echo "What IPv4 address should the OpenVPN server bind to?"
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ip addr | grep inet | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | nl -s ') '
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read -p "IPv4 address [1]: " ip_number
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until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$number_of_ips" ]]; do
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echo "$ip_number: invalid selection."
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read -p "IPv4 address [1]: " ip_number
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done
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[[ -z "$ip_number" ]] && ip_number="1"
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ip=$(ip addr | grep inet | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | sed -n "$ip_number"p)
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fi
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# If $IP is a private IP address, the server must be behind NAT
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||||
if echo "$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?"
|
||||
get_public_ip=$(wget -4qO- "http://whatismyip.akamai.com/" || curl -4Ls "http://whatismyip.akamai.com/")
|
||||
read -p "Public IPv4 address / hostname [$get_public_ip]: " public_ip
|
||||
[ -z "$public_ip" ] && public_ip="$get_public_ip"
|
||||
fi
|
||||
echo
|
||||
echo "Which protocol do you want for OpenVPN connections?"
|
||||
echo " 1) UDP (recommended)"
|
||||
echo " 2) TCP"
|
||||
read -p "Protocol [1-2]: " -e -i 1 PROTOCOL
|
||||
case $PROTOCOL in
|
||||
1)
|
||||
PROTOCOL=udp
|
||||
read -p "Protocol [1]: " protocol
|
||||
until [[ -z "$protocol" || "$protocol" =~ ^[12]$ ]]; do
|
||||
echo "$protocol: invalid selection."
|
||||
read -p "Protocol [1]: " protocol
|
||||
done
|
||||
case "$protocol" in
|
||||
1|"")
|
||||
protocol=udp
|
||||
;;
|
||||
2)
|
||||
PROTOCOL=tcp
|
||||
protocol=tcp
|
||||
;;
|
||||
esac
|
||||
echo ""
|
||||
echo
|
||||
echo "What port do you want OpenVPN listening to?"
|
||||
read -p "Port: " -e -i 1194 PORT
|
||||
echo ""
|
||||
read -p "Port [1194]: " port
|
||||
until [[ -z "$port" || "$port" =~ ^[0-9]+$ && "$port" -le 65535 ]]; do
|
||||
echo "$port: invalid selection."
|
||||
read -p "Port [1194]: " port
|
||||
done
|
||||
[[ -z "$port" ]] && port="1194"
|
||||
echo
|
||||
echo "Which DNS do you want to use with the VPN?"
|
||||
echo " 1) Current system resolvers"
|
||||
echo " 2) 1.1.1.1"
|
||||
echo " 3) Google"
|
||||
echo " 4) OpenDNS"
|
||||
echo " 5) Verisign"
|
||||
read -p "DNS [1-5]: " -e -i 1 DNS
|
||||
echo ""
|
||||
echo "Finally, tell me your name for the client certificate"
|
||||
echo "Please, use one word only, no special characters"
|
||||
read -p "Client name: " -e -i client CLIENT
|
||||
echo ""
|
||||
echo "Okay, that was all I needed. We are ready to setup your OpenVPN server now"
|
||||
read -p "DNS [1]: " dns
|
||||
until [[ -z "$dns" || "$dns" =~ ^[1-5]$ ]]; do
|
||||
echo "$dns: invalid selection."
|
||||
read -p "DNS [1]: " dns
|
||||
done
|
||||
echo
|
||||
echo "Finally, tell me a name for the client certificate."
|
||||
read -p "Client name [client]: " unsanitized_client
|
||||
# Allow a limited set of characters to avoid conflicts
|
||||
client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
|
||||
[[ -z "$client" ]] && client="client"
|
||||
echo
|
||||
echo "Okay, that was all I needed. We are ready to set up your OpenVPN server now."
|
||||
read -n1 -r -p "Press any key to continue..."
|
||||
apt-get update
|
||||
apt-get install openvpn iptables openssl ca-certificates -y
|
||||
apt-get install libqrencode3 libpam-google-authenticator -y
|
||||
# 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/
|
||||
# If running inside a container, disable LimitNPROC to prevent conflicts
|
||||
if systemd-detect-virt -cq; then
|
||||
mkdir /etc/systemd/system/openvpn-server@server.service.d/ 2>/dev/null
|
||||
echo "[Service]
|
||||
LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
|
||||
fi
|
||||
if [[ "$os" = "debian" ]]; then
|
||||
apt-get update
|
||||
apt-get install openvpn iptables openssl ca-certificates -y
|
||||
apt-get install libqrencode3 libpam-google-authenticator -y
|
||||
# Google Authenticator configuration
|
||||
addgroup gauth
|
||||
useradd -g gauth gauth
|
||||
elif [[ "$os" == "amazon-linux" ]]; then
|
||||
amazon-linux-extras install epel -y
|
||||
yum install openvpn iptables openssl ca-certificates tar -y
|
||||
yum install google-authenticator -y
|
||||
groupadd gauth
|
||||
adduser -g gauth gauth
|
||||
else
|
||||
# Else, the distro is CentOS
|
||||
yum install epel-release -y
|
||||
yum install openvpn iptables openssl ca-certificates tar -y
|
||||
yum install google-authenticator -y
|
||||
groupadd gauth
|
||||
adduser -g gauth gauth
|
||||
fi
|
||||
mkdir /etc/openvpn/google-authenticator
|
||||
chown gauth:gauth /etc/openvpn/google-authenticator
|
||||
chmod 0700 /etc/openvpn/google-authenticator
|
||||
# Get easy-rsa
|
||||
wget -O ~/EasyRSA-3.0.4.tgz "https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.4/EasyRSA-3.0.4.tgz"
|
||||
tar xzf ~/EasyRSA-3.0.4.tgz -C ~/
|
||||
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/
|
||||
# Create the PKI, set up the CA, the DH params and the server + client certificates
|
||||
easy_rsa_url='https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.5/EasyRSA-nix-3.0.5.tgz'
|
||||
wget -O ~/easyrsa.tgz "$easy_rsa_url" 2>/dev/null || curl -Lo ~/easyrsa.tgz "$easy_rsa_url"
|
||||
tar xzf ~/easyrsa.tgz -C ~/
|
||||
mv ~/EasyRSA-3.0.5/ /etc/openvpn/server/
|
||||
mv /etc/openvpn/server/EasyRSA-3.0.5/ /etc/openvpn/server/easy-rsa/
|
||||
chown -R root:root /etc/openvpn/server/easy-rsa/
|
||||
rm -f ~/easyrsa.tgz
|
||||
cd /etc/openvpn/server/easy-rsa/
|
||||
# Create the PKI, set up the CA and the server and client certificates
|
||||
./easyrsa init-pki
|
||||
./easyrsa --batch build-ca nopass
|
||||
./easyrsa gen-dh
|
||||
./easyrsa build-server-full server nopass
|
||||
./easyrsa build-client-full $CLIENT nopass
|
||||
EASYRSA_CERT_EXPIRE=3650 ./easyrsa build-server-full server nopass
|
||||
EASYRSA_CERT_EXPIRE=3650 ./easyrsa build-client-full "$client" nopass
|
||||
EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
|
||||
# Move the stuff we need
|
||||
cp pki/ca.crt pki/private/ca.key pki/dh.pem pki/issued/server.crt pki/private/server.key pki/crl.pem /etc/openvpn
|
||||
cp pki/ca.crt pki/private/ca.key pki/issued/server.crt pki/private/server.key pki/crl.pem /etc/openvpn/server
|
||||
# CRL is read with each client connection, when OpenVPN is dropped to nobody
|
||||
chown nobody:$GROUPNAME /etc/openvpn/crl.pem
|
||||
# Generate key for tls-auth
|
||||
openvpn --genkey --secret /etc/openvpn/ta.key
|
||||
# Create Google Authenticator
|
||||
addgroup gauth
|
||||
useradd -g gauth gauth
|
||||
mkdir /etc/openvpn/google-authenticator
|
||||
chown gauth:gauth /etc/openvpn/google-authenticator
|
||||
chmod 0700 /etc/openvpn/google-authenticator
|
||||
chown nobody:"$group_name" /etc/openvpn/server/crl.pem
|
||||
# Generate key for tls-crypt
|
||||
openvpn --genkey --secret /etc/openvpn/server/tc.key
|
||||
# Create the DH parameters file using the predefined ffdhe2048 group
|
||||
echo '-----BEGIN DH PARAMETERS-----
|
||||
MIIBCAKCAQEA//////////+t+FRYortKmq/cViAnPTzx2LnFg84tNpWp4TZBFGQz
|
||||
+8yTnc4kmz75fS/jY2MMddj2gbICrsRhetPfHtXV/WVhJDP1H18GbtCFY2VVPe0a
|
||||
87VXE15/V8k1mE8McODmi3fipona8+/och3xWKE2rec1MKzKT0g6eXq8CrGCsyT7
|
||||
YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjcrsZCwenyO4KbXCeAvzhzffi
|
||||
7MA0BM0oNC9hkXL+nOmFg/+OTxIy7vKBg8P+OxtMb61zO7X8vC7CIAXFjvGDfRaD
|
||||
ssbzSibBsu/6iGtCOGEoXJf//////////wIBAg==
|
||||
-----END DH PARAMETERS-----' > /etc/openvpn/server/dh.pem
|
||||
# Generate server.conf
|
||||
echo "port $PORT
|
||||
proto $PROTOCOL
|
||||
echo "local $ip
|
||||
port $port
|
||||
proto $protocol
|
||||
dev tun
|
||||
sndbuf 0
|
||||
rcvbuf 0
|
||||
ca ca.crt
|
||||
cert server.crt
|
||||
key server.key
|
||||
dh dh.pem
|
||||
auth SHA512
|
||||
tls-auth ta.key 0
|
||||
tls-crypt tc.key
|
||||
topology subnet
|
||||
server 10.8.0.0 255.255.255.0
|
||||
ifconfig-pool-persist ipp.txt" > /etc/openvpn/server.conf
|
||||
echo 'push "redirect-gateway def1 bypass-dhcp"' >> /etc/openvpn/server.conf
|
||||
ifconfig-pool-persist ipp.txt" > /etc/openvpn/server/server.conf
|
||||
echo 'push "redirect-gateway def1 bypass-dhcp"' >> /etc/openvpn/server/server.conf
|
||||
# DNS
|
||||
case $DNS in
|
||||
1)
|
||||
case "$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'
|
||||
resolv_conf="/run/systemd/resolve/resolv.conf"
|
||||
else
|
||||
RESOLVCONF='/etc/resolv.conf'
|
||||
resolv_conf="/etc/resolv.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 line; do
|
||||
echo "push \"dhcp-option DNS $line\"" >> /etc/openvpn/server.conf
|
||||
grep -v '#' "$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\"" >> /etc/openvpn/server/server.conf
|
||||
done
|
||||
;;
|
||||
2)
|
||||
echo 'push "dhcp-option DNS 1.1.1.1"' >> /etc/openvpn/server.conf
|
||||
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/server.conf
|
||||
echo 'push "dhcp-option DNS 1.0.0.1"' >> /etc/openvpn/server/server.conf
|
||||
;;
|
||||
3)
|
||||
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
|
||||
echo 'push "dhcp-option DNS 8.8.8.8"' >> /etc/openvpn/server/server.conf
|
||||
echo 'push "dhcp-option DNS 8.8.4.4"' >> /etc/openvpn/server/server.conf
|
||||
;;
|
||||
4)
|
||||
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
|
||||
echo 'push "dhcp-option DNS 208.67.222.222"' >> /etc/openvpn/server/server.conf
|
||||
echo 'push "dhcp-option DNS 208.67.220.220"' >> /etc/openvpn/server/server.conf
|
||||
;;
|
||||
5)
|
||||
echo 'push "dhcp-option DNS 64.6.64.6"' >> /etc/openvpn/server.conf
|
||||
echo 'push "dhcp-option DNS 64.6.65.6"' >> /etc/openvpn/server.conf
|
||||
echo 'push "dhcp-option DNS 64.6.64.6"' >> /etc/openvpn/server/server.conf
|
||||
echo 'push "dhcp-option DNS 64.6.65.6"' >> /etc/openvpn/server/server.conf
|
||||
;;
|
||||
esac
|
||||
echo "keepalive 10 120
|
||||
cipher AES-256-CBC
|
||||
comp-lzo
|
||||
user nobody
|
||||
group $GROUPNAME
|
||||
user root
|
||||
group root
|
||||
persist-key
|
||||
persist-tun
|
||||
status openvpn-status.log
|
||||
verb 3
|
||||
crl-verify crl.pem
|
||||
plugin /usr/lib/openvpn/openvpn-plugin-auth-pam.so openvpn" >> /etc/openvpn/server.conf
|
||||
mkdir -p /usr/lib/openvpn/
|
||||
ln -s /usr/lib/x86_64-linux-gnu/openvpn/plugins/openvpn-plugin-auth-pam.so /usr/lib/openvpn/openvpn-plugin-auth-pam.so
|
||||
echo "auth required /lib/x86_64-linux-gnu/security/pam_google_authenticator.so secret=/etc/openvpn/google-authenticator/\${USER} user=gauth forward_pass" > /etc/pam.d/openvpn
|
||||
# Enable net.ipv4.ip_forward for the system
|
||||
sed -i '/\<net.ipv4.ip_forward\>/c\net.ipv4.ip_forward=1' /etc/sysctl.conf
|
||||
if ! grep -q "\<net.ipv4.ip_forward\>" /etc/sysctl.conf; then
|
||||
echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf
|
||||
crl-verify crl.pem" >> /etc/openvpn/server/server.conf
|
||||
if [[ "$protocol" = "udp" ]]; then
|
||||
echo "explicit-exit-notify" >> /etc/openvpn/server/server.conf
|
||||
fi
|
||||
# Avoid an unneeded reboot
|
||||
# Authenticator config
|
||||
mkdir -p /usr/lib/openvpn/
|
||||
if [[ "$os" = "debian" ]]; then
|
||||
echo "plugin /usr/lib/openvpn/openvpn-plugin-auth-pam.so openvpn" >> /etc/openvpn/server/server.conf
|
||||
ln -s /usr/lib/x86_64-linux-gnu/openvpn/plugins/openvpn-plugin-auth-pam.so /usr/lib/openvpn/openvpn-plugin-auth-pam.so
|
||||
echo "auth required /lib/x86_64-linux-gnu/security/pam_google_authenticator.so secret=/etc/openvpn/google-authenticator/\${USER} user=gauth forward_pass" > /etc/pam.d/openvpn
|
||||
else
|
||||
# Else, the distro is CentOS or Amazon Linux
|
||||
yum install perl-Authen-PAM -y
|
||||
echo "auth-user-pass-verify auth-pam.pl via-file
|
||||
script-security 2" >> /etc/openvpn/server/server.conf
|
||||
echo "#!/usr/bin/perl -t
|
||||
use Authen::PAM;
|
||||
use POSIX;
|
||||
sub my_conv_func {
|
||||
my @res;
|
||||
while ( @_ ) {
|
||||
my \$code = shift;
|
||||
my \$msg = shift;
|
||||
my \$ans = \"\";
|
||||
|
||||
\$ans = \$password if \$msg =~ /[Pp]assword/;
|
||||
|
||||
push @res, (PAM_SUCCESS(),\$ans);
|
||||
}
|
||||
push @res, PAM_SUCCESS();
|
||||
return @res;
|
||||
}
|
||||
\$service = \"openvpn\";
|
||||
if (\$ARG = shift @ARGV) {
|
||||
if (!open (UPFILE, \"<\$ARG\")) {
|
||||
print \"Could not open username/password file: \$ARG\n\";
|
||||
exit 1;
|
||||
}
|
||||
} else {
|
||||
print \"No username/password file specified on command line\n\";
|
||||
exit 1;
|
||||
}
|
||||
\$username = <UPFILE>;
|
||||
\$password = <UPFILE>;
|
||||
if (!\$username || !\$password) {
|
||||
print \"Username/password not found in file: \$ARG\n\";
|
||||
exit 1;
|
||||
}
|
||||
chomp \$username;
|
||||
chomp \$password;
|
||||
close (UPFILE);
|
||||
if (!ref(\$pamh = new Authen::PAM(\$service, \$username, \&my_conv_func))) {
|
||||
print \"Authen::PAM init failed\n\";
|
||||
exit 1;
|
||||
}
|
||||
\$res = \$pamh->pam_authenticate;
|
||||
if (\$res == PAM_SUCCESS()) {
|
||||
exit 0;
|
||||
} else {
|
||||
print \"Auth '\$username' failed, PAM said: \", \$pamh->pam_strerror($res), \"\n\";
|
||||
exit 1;
|
||||
}" > /etc/openvpn/server/auth-pam.pl
|
||||
chown nobody. /etc/openvpn/server/auth-pam.pl
|
||||
chmod 755 /etc/openvpn/server/auth-pam.pl
|
||||
echo "auth required /usr/lib64/security/pam_google_authenticator.so secret=/etc/openvpn/google-authenticator/\${USER} user=gauth forward_pass" > /etc/pam.d/openvpn
|
||||
fi
|
||||
# Enable net.ipv4.ip_forward for the system
|
||||
echo 'net.ipv4.ip_forward=1' > /etc/sysctl.d/30-openvpn-forward.conf
|
||||
# Enable without waiting for a reboot or service restart
|
||||
echo 1 > /proc/sys/net/ipv4/ip_forward
|
||||
if pgrep firewalld; then
|
||||
# Using both permanent and not permanent rules to avoid a firewalld
|
||||
# reload.
|
||||
# We don't use --add-service=openvpn because that would only work with
|
||||
# the default port and protocol.
|
||||
firewall-cmd --zone=public --add-port=$PORT/$PROTOCOL
|
||||
firewall-cmd --add-port="$port"/"$protocol"
|
||||
firewall-cmd --zone=trusted --add-source=10.8.0.0/24
|
||||
firewall-cmd --permanent --zone=public --add-port=$PORT/$PROTOCOL
|
||||
firewall-cmd --permanent --add-port="$port"/"$protocol"
|
||||
firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24
|
||||
# Set NAT for the VPN subnet
|
||||
firewall-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
|
||||
firewall-cmd --permanent --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
|
||||
firewall-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip"
|
||||
firewall-cmd --permanent --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip"
|
||||
else
|
||||
# Needed to use rc.local with some systemd distros
|
||||
if [[ ! -e $RCLOCAL ]]; then
|
||||
echo '#!/bin/sh -e
|
||||
exit 0' > $RCLOCAL
|
||||
fi
|
||||
chmod +x $RCLOCAL
|
||||
# Set NAT for the VPN subnet
|
||||
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
|
||||
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
|
||||
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
|
||||
# cause problems.
|
||||
iptables -I INPUT -p $PROTOCOL --dport $PORT -j ACCEPT
|
||||
iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
|
||||
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
|
||||
sed -i "1 a\iptables -I INPUT -p $PROTOCOL --dport $PORT -j ACCEPT" $RCLOCAL
|
||||
sed -i "1 a\iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT" $RCLOCAL
|
||||
sed -i "1 a\iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" $RCLOCAL
|
||||
fi
|
||||
# Create a service to set up persistent iptables rules
|
||||
echo "[Unit]
|
||||
Before=network.target
|
||||
[Service]
|
||||
Type=oneshot
|
||||
ExecStart=/sbin/iptables -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ip
|
||||
ExecStart=/sbin/iptables -I INPUT -p $protocol --dport $port -j ACCEPT
|
||||
ExecStart=/sbin/iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
|
||||
ExecStart=/sbin/iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
|
||||
ExecStop=/sbin/iptables -t nat -D POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ip
|
||||
ExecStop=/sbin/iptables -D INPUT -p $protocol --dport $port -j ACCEPT
|
||||
ExecStop=/sbin/iptables -D FORWARD -s 10.8.0.0/24 -j ACCEPT
|
||||
ExecStop=/sbin/iptables -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
|
||||
RemainAfterExit=yes
|
||||
[Install]
|
||||
WantedBy=multi-user.target" > /etc/systemd/system/openvpn-iptables.service
|
||||
systemctl enable --now openvpn-iptables.service
|
||||
fi
|
||||
# And finally, restart OpenVPN
|
||||
# Little hack to check for systemd
|
||||
if pgrep systemd-journal; then
|
||||
systemctl restart openvpn@server.service
|
||||
else
|
||||
/etc/init.d/openvpn restart
|
||||
fi
|
||||
# Try to detect a NATed connection and ask about it to potential LowEndSpirit users
|
||||
EXTERNALIP=$(wget -4qO- "http://whatismyip.akamai.com/")
|
||||
if [[ "$IP" != "$EXTERNALIP" ]]; then
|
||||
echo ""
|
||||
echo "Looks like your server could be behind a NAT!"
|
||||
echo ""
|
||||
echo "If your server is behind a NAT, I need to know the public IP or hostname"
|
||||
echo "If that's not the case, just ignore this and leave the next field blank"
|
||||
read -p "Public IP: " -e PUBLICIP
|
||||
if [[ "$PUBLICIP" != "" ]]; then
|
||||
IP=$PUBLICIP
|
||||
# If SELinux is enabled and a custom port was selected, we need this
|
||||
if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 1194 ]]; then
|
||||
# Install semanage if not already present
|
||||
if ! hash semanage 2>/dev/null; then
|
||||
if grep -qs "CentOS Linux release 7" "/etc/centos-release"; then
|
||||
yum install policycoreutils-python -y
|
||||
else
|
||||
yum install policycoreutils-python-utils -y
|
||||
fi
|
||||
fi
|
||||
semanage port -a -t openvpn_port_t -p "$protocol" "$port"
|
||||
fi
|
||||
# If the server is behind a NAT, use the correct IP address
|
||||
if [[ "$public_ip" != "" ]]; then
|
||||
ip="$public_ip"
|
||||
fi
|
||||
# client-common.txt is created so we have a template to add further users later
|
||||
echo "client
|
||||
dev tun
|
||||
proto $PROTOCOL
|
||||
sndbuf 0
|
||||
rcvbuf 0
|
||||
remote $IP $PORT
|
||||
proto $protocol
|
||||
remote $ip $port
|
||||
resolv-retry infinite
|
||||
nobind
|
||||
persist-key
|
||||
|
|
@ -376,16 +525,15 @@ persist-tun
|
|||
remote-cert-tls server
|
||||
auth SHA512
|
||||
cipher AES-256-CBC
|
||||
comp-lzo
|
||||
key-direction 1
|
||||
verb 3
|
||||
ns-cert-type server
|
||||
auth-user-pass" > /etc/openvpn/client-common.txt
|
||||
auth-user-pass" > /etc/openvpn/server/client-common.txt
|
||||
# Enable and start the OpenVPN service
|
||||
systemctl enable --now openvpn-server@server.service
|
||||
# Generates the custom client.ovpn
|
||||
newclient "$CLIENT"
|
||||
echo ""
|
||||
new_client "$client"
|
||||
echo
|
||||
echo "Finished!"
|
||||
echo ""
|
||||
echo "Your client configuration is available at" ~/"$CLIENT.ovpn"
|
||||
echo "If you want to add more clients, you simply need to run this script again!"
|
||||
fi
|
||||
echo
|
||||
echo "Your client configuration is available at:" ~/"$client.ovpn"
|
||||
echo "If you want to add more clients, just run this script again!"
|
||||
fi
|
||||
Loading…
Add table
Reference in a new issue