fix
This commit is contained in:
simono41
parent
c65aa9afa5
commit
018d6db37f
2 changed files with 695 additions and 1 deletions
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@ -493,7 +493,7 @@ persist-tun
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keepalive 10 120
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keepalive 10 120
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topology subnet
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topology subnet
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server 10.8.0.0 255.255.255.0
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server 10.8.0.0 255.255.255.0
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ifconfig-pool-persist ipp.txt" >> /etc/openvpn/server.conf
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push \"route 10.8.0.0 255.255.255.0\"" >> /etc/openvpn/server.conf
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# DNS resolvers
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# DNS resolvers
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case $DNS in
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case $DNS in
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1)
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1)
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@ -536,6 +536,7 @@ tls-auth tls-auth.key 0
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dh dh.pem
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dh dh.pem
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auth SHA256
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auth SHA256
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$CIPHER
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$CIPHER
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comp-lzo
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tls-server
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tls-server
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tls-version-min 1.2
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tls-version-min 1.2
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tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
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tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
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@ -672,6 +673,7 @@ remote-cert-tls server
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auth SHA256
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auth SHA256
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auth-nocache
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auth-nocache
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$CIPHER
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$CIPHER
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comp-lzo
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tls-client
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tls-client
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tls-version-min 1.2
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tls-version-min 1.2
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tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
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tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
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692
openvpn-install.sh.save
Executable file
692
openvpn-install.sh.save
Executable file
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@ -0,0 +1,692 @@
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#!/bin/bash
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set -ex
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# Secure OpenVPN server installer for Debian, Ubuntu, CentOS and Arch Linux
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# https://github.com/Angristan/OpenVPN-install
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if [[ "$EUID" -ne 0 ]]; then
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echo "Sorry, you need to run this as root"
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exit 1
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fi
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if [[ ! -e /dev/net/tun ]]; then
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echo "TUN is not available"
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exit 2
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fi
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if grep -qs "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 3
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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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# Getting the version number, to verify that a recent version of OpenVPN is available
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VERSION_ID=$(cat /etc/os-release | grep "VERSION_ID")
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IPTABLES='/etc/iptables/iptables.rules'
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SYSCTL='/etc/sysctl.conf'
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if [[ "$VERSION_ID" != 'VERSION_ID="7"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="8"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="9"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="12.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="14.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.10"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="17.04"' ]]; then
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echo "Your version of Debian/Ubuntu is not supported."
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echo "I can't install a recent version of OpenVPN on your system."
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echo ""
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echo "However, if you're using Debian unstable/testing, or Ubuntu beta,"
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echo "then you can continue, a recent version of OpenVPN is available on these."
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echo "Keep in mind they are not supported, though."
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while [[ $CONTINUE != "y" && $CONTINUE != "n" ]]; do
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read -p "Continue ? [y/n]: " -e CONTINUE
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done
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if [[ "$CONTINUE" = "n" ]]; then
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echo "Ok, bye !"
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exit 4
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fi
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fi
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elif [[ -e /etc/centos-release || -e /etc/redhat-release ]]; then
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OS=centos
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IPTABLES='/etc/iptables/iptables.rules'
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SYSCTL='/etc/sysctl.conf'
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elif [[ -e /etc/arch-release ]]; then
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OS=arch
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IPTABLES='/etc/iptables/iptables.rules'
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SYSCTL='/etc/sysctl.d/openvpn.conf'
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else
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echo "Looks like you aren't running this installer on a Debian, Ubuntu, CentOS or ArchLinux system"
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exit 4
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fi
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newclient () {
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# Where to write the custom client.ovpn?
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if [ -e /home/$1 ]; then # if $1 is a user name
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homeDir="/home/$1"
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elif [ ${SUDO_USER} ]; then # if not, use SUDO_USER
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homeDir="/home/${SUDO_USER}"
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else # if not SUDO_USER, use /root
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homeDir="/root"
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fi
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# Generates the custom client.ovpn
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cp /etc/openvpn/client-template.txt $homeDir/$1.ovpn
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echo "<ca>" >> $homeDir/$1.ovpn
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cat /etc/openvpn/easy-rsa/pki/ca.crt >> $homeDir/$1.ovpn
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echo "</ca>" >> $homeDir/$1.ovpn
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echo "<cert>" >> $homeDir/$1.ovpn
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cat /etc/openvpn/easy-rsa/pki/issued/$1.crt >> $homeDir/$1.ovpn
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echo "</cert>" >> $homeDir/$1.ovpn
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echo "<key>" >> $homeDir/$1.ovpn
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cat /etc/openvpn/easy-rsa/pki/private/$1.key >> $homeDir/$1.ovpn
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echo "</key>" >> $homeDir/$1.ovpn
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echo "key-direction 1" >> $homeDir/$1.ovpn
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echo "<tls-auth>" >> $homeDir/$1.ovpn
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cat /etc/openvpn/tls-auth.key >> $homeDir/$1.ovpn
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echo "</tls-auth>" >> $homeDir/$1.ovpn
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}
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# Try to get our IP from the system and fallback to the Internet.
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# I do this to make the script compatible with NATed servers (LowEndSpirit/Scaleway)
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# and to avoid getting an IPv6.
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IP=$(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 -qO- ipv4.icanhazip.com)
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fi
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# Get Internet network interface with default route
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NIC=$(ip -4 route ls | grep default -m 1 | grep -Po '(?<=dev )(\S+)' | head -1)
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if [[ -e /etc/openvpn/server.conf ]]; then
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while :
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do
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clear
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echo "OpenVPN-install (github.com/Angristan/OpenVPN-install)"
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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 cert for a new user"
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echo " 2) Revoke existing user cert"
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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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1)
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echo ""
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echo "Tell me a name for the client cert"
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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 $CLIENT nopass
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# Generates the custom client.ovpn
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newclient "$CLIENT"
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echo ""
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echo "Client $CLIENT added, certs available at $homeDir/$CLIENT.ovpn"
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exit
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;;
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2)
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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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echo "You have no existing clients!"
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exit 5
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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 [[ "$NUMBEROFCLIENTS" = '1' ]]; then
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read -p "Select one client [1]: " CLIENTNUMBER
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else
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read -p "Select one client [1-$NUMBEROFCLIENTS]: " CLIENTNUMBER
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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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cp /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn/crl.pem
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chmod 644 /etc/openvpn/crl.pem
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echo ""
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echo "Certificate for client $CLIENT revoked"
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echo "Exiting..."
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exit
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;;
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3)
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echo ""
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read -p "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE
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if [[ "$REMOVE" = 'y' ]]; then
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PORT=$(grep '^port ' /etc/openvpn/server.conf | cut -d " " -f 2)
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if pgrep firewalld; then
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# Using both permanent and not permanent rules to avoid a firewalld reload.
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firewall-cmd --zone=public --remove-port=$PORT/udp
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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=$PORT/udp
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firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24
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fi
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if iptables -L -n | grep -qE 'REJECT|DROP'; then
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if [[ "$PROTOCOL" = 'udp' ]]; then
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iptables -D INPUT -p udp --dport $PORT -j ACCEPT
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else
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iptables -D INPUT -p tcp --dport $PORT -j ACCEPT
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fi
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iptables -D FORWARD -s 10.8.0.0/24 -j ACCEPT
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iptables-save > $IPTABLES
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fi
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iptables -t nat -D POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
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iptables-save > $IPTABLES
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if hash sestatus 2>/dev/null; then
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if sestatus | grep "Current mode" | grep -qs "enforcing"; then
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if [[ "$PORT" != '1194' ]]; then
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semanage port -d -t openvpn_port_t -p udp $PORT
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fi
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fi
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fi
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if [[ "$OS" = 'debian' ]]; then
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apt-get autoremove --purge -y openvpn
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elif [[ "$OS" = 'arch' ]]; then
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pacman -R openvpn --noconfirm
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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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echo ""
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echo "OpenVPN removed!"
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else
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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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;;
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4) exit;;
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esac
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done
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else
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clear
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echo "Welcome to the secure OpenVPN installer (github.com/Angristan/OpenVPN-install)"
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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 "I need to know the IPv4 address of the network interface you want OpenVPN listening to."
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echo "If your server is running behind a NAT, (e.g. LowEndSpirit, Scaleway) leave the IP address as it is. (local/private IP)"
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echo "Otherwise, it should be your public IPv4 address."
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read -p "IP address: " -e -i $IP IP
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echo ""
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echo "What port do you want for OpenVPN?"
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read -p "Port: " -e -i 1194 PORT
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echo ""
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echo "What protocol do you want for OpenVPN?"
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echo "Unless UDP is blocked, you should not use TCP (unnecessarily slower)"
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while [[ $PROTOCOL != "UDP" && $PROTOCOL != "TCP" ]]; do
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read -p "Protocol [UDP/TCP]: " -e -i UDP PROTOCOL
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done
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echo ""
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echo "What DNS do you want to use with the VPN?"
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echo " 1) Current system resolvers (in /etc/resolv.conf)"
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echo " 2) FDN (France)"
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echo " 3) DNS.WATCH (Germany)"
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echo " 4) OpenDNS (Anycast: worldwide)"
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echo " 5) Google (Anycast: worldwide)"
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echo " 6) Yandex Basic (Russia)"
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echo " 7) AdGuard DNS (Russia)"
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while [[ $DNS != "1" && $DNS != "2" && $DNS != "3" && $DNS != "4" && $DNS != "5" && $DNS != "6" && $DNS != "7" ]]; do
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read -p "DNS [1-7]: " -e -i 1 DNS
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done
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echo ""
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echo "See https://github.com/Angristan/OpenVPN-install#encryption to learn more about "
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echo "the encryption in OpenVPN and the choices I made in this script."
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echo "Please note that all the choices proposed are secure (to a different degree)"
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echo "and are still viable to date, unlike some default OpenVPN options"
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echo ''
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echo "Choose which cipher you want to use for the data channel:"
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echo " 1) AES-128-CBC (fastest and sufficiently secure for everyone, recommended)"
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echo " 2) AES-192-CBC"
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echo " 3) AES-256-CBC"
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echo "Alternatives to AES, use them only if you know what you're doing."
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echo "They are relatively slower but as secure as AES."
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echo " 4) CAMELLIA-128-CBC"
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echo " 5) CAMELLIA-192-CBC"
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echo " 6) CAMELLIA-256-CBC"
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echo " 7) SEED-CBC"
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while [[ $CIPHER != "1" && $CIPHER != "2" && $CIPHER != "3" && $CIPHER != "4" && $CIPHER != "5" && $CIPHER != "6" && $CIPHER != "7" ]]; do
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read -p "Cipher [1-7]: " -e -i 1 CIPHER
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done
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case $CIPHER in
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1)
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CIPHER="cipher AES-128-CBC"
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;;
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2)
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CIPHER="cipher AES-192-CBC"
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;;
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3)
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CIPHER="cipher AES-256-CBC"
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;;
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4)
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CIPHER="cipher CAMELLIA-128-CBC"
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;;
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5)
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CIPHER="cipher CAMELLIA-192-CBC"
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;;
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6)
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CIPHER="cipher CAMELLIA-256-CBC"
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;;
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7)
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CIPHER="cipher SEED-CBC"
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;;
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esac
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echo ""
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echo "Choose what size of Diffie-Hellman key you want to use:"
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echo " 1) 2048 bits (fastest)"
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echo " 2) 3072 bits (recommended, best compromise)"
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echo " 3) 4096 bits (most secure)"
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while [[ $DH_KEY_SIZE != "1" && $DH_KEY_SIZE != "2" && $DH_KEY_SIZE != "3" ]]; do
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read -p "DH key size [1-3]: " -e -i 2 DH_KEY_SIZE
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done
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case $DH_KEY_SIZE in
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1)
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DH_KEY_SIZE="2048"
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;;
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2)
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DH_KEY_SIZE="3072"
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;;
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3)
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DH_KEY_SIZE="4096"
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;;
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esac
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echo ""
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echo "Choose what size of RSA key you want to use:"
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echo " 1) 2048 bits (fastest)"
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echo " 2) 3072 bits (recommended, best compromise)"
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echo " 3) 4096 bits (most secure)"
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while [[ $RSA_KEY_SIZE != "1" && $RSA_KEY_SIZE != "2" && $RSA_KEY_SIZE != "3" ]]; do
|
||||||
|
read -p "RSA key size [1-3]: " -e -i 2 RSA_KEY_SIZE
|
||||||
|
done
|
||||||
|
case $RSA_KEY_SIZE in
|
||||||
|
1)
|
||||||
|
RSA_KEY_SIZE="2048"
|
||||||
|
;;
|
||||||
|
2)
|
||||||
|
RSA_KEY_SIZE="3072"
|
||||||
|
;;
|
||||||
|
3)
|
||||||
|
RSA_KEY_SIZE="4096"
|
||||||
|
;;
|
||||||
|
esac
|
||||||
|
echo ""
|
||||||
|
echo "Finally, tell me a name for the client certificate and configuration"
|
||||||
|
while [[ $CLIENT = "" ]]; do
|
||||||
|
echo "Please, use one word only, no special characters"
|
||||||
|
read -p "Client name: " -e -i client CLIENT
|
||||||
|
done
|
||||||
|
echo ""
|
||||||
|
echo "Okay, that was all I needed. We are ready to setup your OpenVPN server now"
|
||||||
|
read -n1 -r -p "Press any key to continue..."
|
||||||
|
|
||||||
|
if [[ "$OS" = 'debian' ]]; then
|
||||||
|
apt-get install ca-certificates -y
|
||||||
|
# We add the OpenVPN repo to get the latest version.
|
||||||
|
# Debian 7
|
||||||
|
if [[ "$VERSION_ID" = 'VERSION_ID="7"' ]]; then
|
||||||
|
echo "deb http://build.openvpn.net/debian/openvpn/stable wheezy main" > /etc/apt/sources.list.d/openvpn.list
|
||||||
|
wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
|
||||||
|
apt-get update
|
||||||
|
fi
|
||||||
|
# Debian 8
|
||||||
|
if [[ "$VERSION_ID" = 'VERSION_ID="8"' ]]; then
|
||||||
|
echo "deb http://build.openvpn.net/debian/openvpn/stable jessie main" > /etc/apt/sources.list.d/openvpn.list
|
||||||
|
wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
|
||||||
|
apt update
|
||||||
|
fi
|
||||||
|
# Ubuntu 12.04
|
||||||
|
if [[ "$VERSION_ID" = 'VERSION_ID="12.04"' ]]; then
|
||||||
|
echo "deb http://build.openvpn.net/debian/openvpn/stable precise main" > /etc/apt/sources.list.d/openvpn.list
|
||||||
|
wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
|
||||||
|
apt-get update
|
||||||
|
fi
|
||||||
|
# Ubuntu 14.04
|
||||||
|
if [[ "$VERSION_ID" = 'VERSION_ID="14.04"' ]]; then
|
||||||
|
echo "deb http://build.openvpn.net/debian/openvpn/stable trusty main" > /etc/apt/sources.list.d/openvpn.list
|
||||||
|
wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
|
||||||
|
apt-get update
|
||||||
|
fi
|
||||||
|
# Ubuntu >= 16.04 and Debian > 8 have OpenVPN > 2.3.3 without the need of a third party repository.
|
||||||
|
# The we install OpenVPN
|
||||||
|
apt-get install openvpn iptables openssl wget ca-certificates curl -y
|
||||||
|
# Install iptables service
|
||||||
|
if [[ ! -e /etc/systemd/system/iptables.service ]]; then
|
||||||
|
mkdir /etc/iptables
|
||||||
|
iptables-save > /etc/iptables/iptables.rules
|
||||||
|
echo "#!/bin/sh
|
||||||
|
iptables -F
|
||||||
|
iptables -X
|
||||||
|
iptables -t nat -F
|
||||||
|
iptables -t nat -X
|
||||||
|
iptables -t mangle -F
|
||||||
|
iptables -t mangle -X
|
||||||
|
iptables -P INPUT ACCEPT
|
||||||
|
iptables -P FORWARD ACCEPT
|
||||||
|
iptables -P OUTPUT ACCEPT" > /etc/iptables/flush-iptables.sh
|
||||||
|
chmod +x /etc/iptables/flush-iptables.sh
|
||||||
|
echo "[Unit]
|
||||||
|
Description=Packet Filtering Framework
|
||||||
|
DefaultDependencies=no
|
||||||
|
Before=network-pre.target
|
||||||
|
Wants=network-pre.target
|
||||||
|
[Service]
|
||||||
|
Type=oneshot
|
||||||
|
ExecStart=/sbin/iptables-restore /etc/iptables/iptables.rules
|
||||||
|
ExecReload=/sbin/iptables-restore /etc/iptables/iptables.rules
|
||||||
|
ExecStop=/etc/iptables/flush-iptables.sh
|
||||||
|
RemainAfterExit=yes
|
||||||
|
[Install]
|
||||||
|
WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
|
||||||
|
systemctl daemon-reload
|
||||||
|
systemctl enable iptables.service
|
||||||
|
fi
|
||||||
|
elif [[ "$OS" = 'centos' ]]; then
|
||||||
|
yum install epel-release -y
|
||||||
|
yum install openvpn iptables openssl wget ca-certificates curl -y
|
||||||
|
# Install iptables service
|
||||||
|
if [[ ! -e /etc/systemd/system/iptables.service ]]; then
|
||||||
|
mkdir /etc/iptables
|
||||||
|
iptables-save > /etc/iptables/iptables.rules
|
||||||
|
echo "#!/bin/sh
|
||||||
|
iptables -F
|
||||||
|
iptables -X
|
||||||
|
iptables -t nat -F
|
||||||
|
iptables -t nat -X
|
||||||
|
iptables -t mangle -F
|
||||||
|
iptables -t mangle -X
|
||||||
|
iptables -P INPUT ACCEPT
|
||||||
|
iptables -P FORWARD ACCEPT
|
||||||
|
iptables -P OUTPUT ACCEPT" > /etc/iptables/flush-iptables.sh
|
||||||
|
chmod +x /etc/iptables/flush-iptables.sh
|
||||||
|
echo "[Unit]
|
||||||
|
Description=Packet Filtering Framework
|
||||||
|
DefaultDependencies=no
|
||||||
|
Before=network-pre.target
|
||||||
|
Wants=network-pre.target
|
||||||
|
[Service]
|
||||||
|
Type=oneshot
|
||||||
|
ExecStart=/sbin/iptables-restore /etc/iptables/iptables.rules
|
||||||
|
ExecReload=/sbin/iptables-restore /etc/iptables/iptables.rules
|
||||||
|
ExecStop=/etc/iptables/flush-iptables.sh
|
||||||
|
RemainAfterExit=yes
|
||||||
|
[Install]
|
||||||
|
WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
|
||||||
|
systemctl daemon-reload
|
||||||
|
systemctl enable iptables.service
|
||||||
|
# Disable firewalld to allow iptables to start upon reboot
|
||||||
|
systemctl disable firewalld
|
||||||
|
fi
|
||||||
|
else
|
||||||
|
# Else, the distro is ArchLinux
|
||||||
|
echo ""
|
||||||
|
echo ""
|
||||||
|
echo "As you're using ArchLinux, I need to update the packages on your system to install those I need."
|
||||||
|
echo "Not doing that could cause problems between dependencies, or missing files in repositories."
|
||||||
|
echo ""
|
||||||
|
echo "Continuing will update your installed packages and install needed ones."
|
||||||
|
while [[ $CONTINUE != "y" && $CONTINUE != "n" ]]; do
|
||||||
|
read -p "Continue ? [y/n]: " -e -i y CONTINUE
|
||||||
|
done
|
||||||
|
if [[ "$CONTINUE" = "n" ]]; then
|
||||||
|
echo "Ok, bye !"
|
||||||
|
exit 4
|
||||||
|
fi
|
||||||
|
|
||||||
|
if [[ "$OS" = 'arch' ]]; then
|
||||||
|
# Install dependencies
|
||||||
|
pacman -Syu openvpn iptables openssl wget ca-certificates curl --needed --noconfirm
|
||||||
|
iptables-save > /etc/iptables/iptables.rules # iptables won't start if this file does not exist
|
||||||
|
systemctl daemon-reload
|
||||||
|
systemctl enable iptables
|
||||||
|
systemctl start iptables
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
# Find out if the machine uses nogroup or nobody for the permissionless group
|
||||||
|
if grep -qs "^nogroup:" /etc/group; then
|
||||||
|
NOGROUP=nogroup
|
||||||
|
else
|
||||||
|
NOGROUP=nobody
|
||||||
|
fi
|
||||||
|
|
||||||
|
# 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/
|
||||||
|
fi
|
||||||
|
# Get easy-rsa
|
||||||
|
wget -O ~/EasyRSA-3.0.3.tgz https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.3/EasyRSA-3.0.3.tgz
|
||||||
|
tar xzf ~/EasyRSA-3.0.3.tgz -C ~/
|
||||||
|
mv ~/EasyRSA-3.0.3/ /etc/openvpn/
|
||||||
|
mv /etc/openvpn/EasyRSA-3.0.3/ /etc/openvpn/easy-rsa/
|
||||||
|
chown -R root:root /etc/openvpn/easy-rsa/
|
||||||
|
rm -rf ~/EasyRSA-3.0.3.tgz
|
||||||
|
cd /etc/openvpn/easy-rsa/
|
||||||
|
echo "set_var EASYRSA_KEY_SIZE $RSA_KEY_SIZE" > vars
|
||||||
|
# Create the PKI, set up the CA, the DH params and the server + client certificates
|
||||||
|
./easyrsa init-pki
|
||||||
|
./easyrsa --batch build-ca nopass
|
||||||
|
openssl dhparam -out dh.pem $DH_KEY_SIZE
|
||||||
|
./easyrsa build-server-full server nopass
|
||||||
|
./easyrsa build-client-full $CLIENT nopass
|
||||||
|
EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
|
||||||
|
# generate tls-auth key
|
||||||
|
openvpn --genkey --secret /etc/openvpn/tls-auth.key
|
||||||
|
# Move all the generated files
|
||||||
|
cp pki/ca.crt pki/private/ca.key dh.pem pki/issued/server.crt pki/private/server.key /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn
|
||||||
|
# Make cert revocation list readable for non-root
|
||||||
|
chmod 644 /etc/openvpn/crl.pem
|
||||||
|
|
||||||
|
# Generate server.conf
|
||||||
|
echo "port $PORT" > /etc/openvpn/server.conf
|
||||||
|
if [[ "$PROTOCOL" = 'UDP' ]]; then
|
||||||
|
echo "proto udp" >> /etc/openvpn/server.conf
|
||||||
|
elif [[ "$PROTOCOL" = 'TCP' ]]; then
|
||||||
|
echo "proto tcp" >> /etc/openvpn/server.conf
|
||||||
|
fi
|
||||||
|
echo "dev tun
|
||||||
|
user nobody
|
||||||
|
group $NOGROUP
|
||||||
|
persist-key
|
||||||
|
persist-tun
|
||||||
|
keepalive 10 120
|
||||||
|
topology subnet
|
||||||
|
server 10.8.0.0 255.255.255.0
|
||||||
|
ifconfig-pool-persist ipp.txt" >> /etc/openvpn/server.conf
|
||||||
|
# DNS resolvers
|
||||||
|
case $DNS in
|
||||||
|
1)
|
||||||
|
# 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
|
||||||
|
echo "push \"dhcp-option DNS $line\"" >> /etc/openvpn/server.conf
|
||||||
|
done
|
||||||
|
;;
|
||||||
|
2) #FDN
|
||||||
|
echo 'push "dhcp-option DNS 80.67.169.12"' >> /etc/openvpn/server.conf
|
||||||
|
echo 'push "dhcp-option DNS 80.67.169.40"' >> /etc/openvpn/server.conf
|
||||||
|
;;
|
||||||
|
3) #DNS.WATCH
|
||||||
|
echo 'push "dhcp-option DNS 84.200.69.80"' >> /etc/openvpn/server.conf
|
||||||
|
echo 'push "dhcp-option DNS 84.200.70.40"' >> /etc/openvpn/server.conf
|
||||||
|
;;
|
||||||
|
4) #OpenDNS
|
||||||
|
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
|
||||||
|
;;
|
||||||
|
5) #Google
|
||||||
|
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
|
||||||
|
;;
|
||||||
|
6) #Yandex Basic
|
||||||
|
echo 'push "dhcp-option DNS 77.88.8.8"' >> /etc/openvpn/server.conf
|
||||||
|
echo 'push "dhcp-option DNS 77.88.8.1"' >> /etc/openvpn/server.conf
|
||||||
|
;;
|
||||||
|
7) #AdGuard DNS
|
||||||
|
echo 'push "dhcp-option DNS 176.103.130.130"' >> /etc/openvpn/server.conf
|
||||||
|
echo 'push "dhcp-option DNS 176.103.130.131"' >> /etc/openvpn/server.conf
|
||||||
|
;;
|
||||||
|
esac
|
||||||
|
echo 'push "redirect-gateway def1 bypass-dhcp" '>> /etc/openvpn/server.conf
|
||||||
|
echo "crl-verify crl.pem
|
||||||
|
ca ca.crt
|
||||||
|
cert server.crt
|
||||||
|
key server.key
|
||||||
|
tls-auth tls-auth.key 0
|
||||||
|
dh dh.pem
|
||||||
|
auth SHA256
|
||||||
|
$CIPHER
|
||||||
|
tls-server
|
||||||
|
tls-version-min 1.2
|
||||||
|
tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
|
||||||
|
status openvpn.log
|
||||||
|
verb 3" >> /etc/openvpn/server.conf
|
||||||
|
|
||||||
|
# Create the sysctl configuration file if needed (mainly for Arch Linux)
|
||||||
|
if [[ ! -e $SYSCTL ]]; then
|
||||||
|
touch $SYSCTL
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Enable net.ipv4.ip_forward for the system
|
||||||
|
sed -i '/\<net.ipv4.ip_forward\>/c\net.ipv4.ip_forward=1' $SYSCTL
|
||||||
|
if ! grep -q "\<net.ipv4.ip_forward\>" $SYSCTL; then
|
||||||
|
echo 'net.ipv4.ip_forward=1' >> $SYSCTL
|
||||||
|
fi
|
||||||
|
# Avoid an unneeded reboot
|
||||||
|
echo 1 > /proc/sys/net/ipv4/ip_forward
|
||||||
|
# Set NAT for the VPN subnet
|
||||||
|
iptables -t nat -A POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
|
||||||
|
# Save persitent iptables rules
|
||||||
|
iptables-save > $IPTABLES
|
||||||
|
if pgrep firewalld; then
|
||||||
|
# We don't use --add-service=openvpn because that would only work with
|
||||||
|
# the default port. Using both permanent and not permanent rules to
|
||||||
|
# avoid a firewalld reload.
|
||||||
|
if [[ "$PROTOCOL" = 'UDP' ]]; then
|
||||||
|
firewall-cmd --zone=public --add-port=$PORT/udp
|
||||||
|
firewall-cmd --permanent --zone=public --add-port=$PORT/udp
|
||||||
|
elif [[ "$PROTOCOL" = 'TCP' ]]; then
|
||||||
|
firewall-cmd --zone=public --add-port=$PORT/tcp
|
||||||
|
firewall-cmd --permanent --zone=public --add-port=$PORT/tcp
|
||||||
|
fi
|
||||||
|
firewall-cmd --zone=trusted --add-source=10.8.0.0/24
|
||||||
|
firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24
|
||||||
|
fi
|
||||||
|
if iptables -L -n | grep -qE 'REJECT|DROP'; then
|
||||||
|
# If iptables has at least one REJECT rule, we asume this is needed.
|
||||||
|
# Not the best approach but I can't think of other and this shouldn't
|
||||||
|
# cause problems.
|
||||||
|
if [[ "$PROTOCOL" = 'UDP' ]]; then
|
||||||
|
iptables -I INPUT -p udp --dport $PORT -j ACCEPT
|
||||||
|
elif [[ "$PROTOCOL" = 'TCP' ]]; then
|
||||||
|
iptables -I INPUT -p tcp --dport $PORT -j ACCEPT
|
||||||
|
fi
|
||||||
|
iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
|
||||||
|
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
|
||||||
|
# Save persitent OpenVPN rules
|
||||||
|
iptables-save > $IPTABLES
|
||||||
|
fi
|
||||||
|
# If SELinux is enabled and a custom port was selected, we need this
|
||||||
|
if hash sestatus 2>/dev/null; then
|
||||||
|
if sestatus | grep "Current mode" | grep -qs "enforcing"; then
|
||||||
|
if [[ "$PORT" != '1194' ]]; then
|
||||||
|
# semanage isn't available in CentOS 6 by default
|
||||||
|
if ! hash semanage 2>/dev/null; then
|
||||||
|
yum install policycoreutils-python -y
|
||||||
|
fi
|
||||||
|
if [[ "$PROTOCOL" = 'UDP' ]]; then
|
||||||
|
semanage port -a -t openvpn_port_t -p udp $PORT
|
||||||
|
elif [[ "$PROTOCOL" = 'TCP' ]]; then
|
||||||
|
semanage port -a -t openvpn_port_t -p tcp $PORT
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
# And finally, restart OpenVPN
|
||||||
|
if [[ "$OS" = 'debian' ]]; then
|
||||||
|
# Little hack to check for systemd
|
||||||
|
if pgrep systemd-journal; then
|
||||||
|
if [[ "$VERSION_ID" = 'VERSION_ID="9"' ]]; then
|
||||||
|
#Workaround to fix OpenVPN service on Debian 9 OpenVZ
|
||||||
|
sed -i 's|/etc/openvpn/server|/etc/openvpn|' /lib/systemd/system/openvpn-server\@.service
|
||||||
|
sed -i 's|%i.conf|server.conf|' /lib/systemd/system/openvpn-server\@.service
|
||||||
|
systemctl daemon-reload
|
||||||
|
systemctl restart openvpn-server@openvpn.service
|
||||||
|
systemctl enable openvpn-server@openvpn.service
|
||||||
|
elif [[ "$VERSION_ID" = 'VERSION_ID="16.04"' ]]; then
|
||||||
|
#Workaround to fix OpenVPN service on Debian 9 OpenVZ
|
||||||
|
sed -i 's|/etc/openvpn/server|/etc/openvpn|' /lib/systemd/system/openvpn-server\@.service
|
||||||
|
sed -i 's|%i.conf|server.conf|' /lib/systemd/system/openvpn-server\@.service
|
||||||
|
systemctl daemon-reload
|
||||||
|
systemctl restart openvpn-server@openvpn.service
|
||||||
|
systemctl enable openvpn-server@openvpn.service
|
||||||
|
else
|
||||||
|
systemctl restart openvpn-server@openvpn.service
|
||||||
|
fi
|
||||||
|
else
|
||||||
|
/etc/init.d/openvpn restart
|
||||||
|
fi
|
||||||
|
else
|
||||||
|
if pgrep systemd-journal; then
|
||||||
|
if [[ "$OS" = 'arch' ]] || [[ "$VERSION_ID" = 'VERSION_ID="16.04"' ]]; then
|
||||||
|
#Workaround to avoid rewriting the entire script for Arch
|
||||||
|
sed -i 's|/etc/openvpn/server|/etc/openvpn|' /usr/lib/systemd/system/openvpn-server@.service
|
||||||
|
sed -i 's|%i.conf|server.conf|' /usr/lib/systemd/system/openvpn-server@.service
|
||||||
|
systemctl daemon-reload
|
||||||
|
systemctl restart openvpn-server@openvpn.service
|
||||||
|
systemctl enable openvpn-server@openvpn.service
|
||||||
|
else
|
||||||
|
systemctl restart openvpn@server.service
|
||||||
|
systemctl enable openvpn@server.service
|
||||||
|
fi
|
||||||
|
else
|
||||||
|
service openvpn restart
|
||||||
|
chkconfig openvpn on
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
# Try to detect a NATed connection and ask about it to potential LowEndSpirit/Scaleway users
|
||||||
|
EXTERNALIP=$(wget -qO- ipv4.icanhazip.com)
|
||||||
|
if [[ "$IP" != "$EXTERNALIP" ]]; then
|
||||||
|
echo ""
|
||||||
|
echo "Looks like your server is behind a NAT!"
|
||||||
|
echo ""
|
||||||
|
echo "If your server is NATed (e.g. LowEndSpirit, Scaleway, or behind a router),"
|
||||||
|
echo "then I need to know the address that can be used to access it from outside."
|
||||||
|
echo "If that's not the case, just ignore this and leave the next field blank"
|
||||||
|
read -p "External IP or domain name: " -e USEREXTERNALIP
|
||||||
|
if [[ "$USEREXTERNALIP" != "" ]]; then
|
||||||
|
IP=$USEREXTERNALIP
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
# client-template.txt is created so we have a template to add further users later
|
||||||
|
echo "client" > /etc/openvpn/client-template.txt
|
||||||
|
if [[ "$PROTOCOL" = 'UDP' ]]; then
|
||||||
|
echo "proto udp" >> /etc/openvpn/client-template.txt
|
||||||
|
elif [[ "$PROTOCOL" = 'TCP' ]]; then
|
||||||
|
echo "proto tcp-client" >> /etc/openvpn/client-template.txt
|
||||||
|
fi
|
||||||
|
echo "remote $IP $PORT
|
||||||
|
dev tun
|
||||||
|
resolv-retry infinite
|
||||||
|
nobind
|
||||||
|
persist-key
|
||||||
|
persist-tun
|
||||||
|
remote-cert-tls server
|
||||||
|
auth SHA256
|
||||||
|
auth-nocache
|
||||||
|
$CIPHER
|
||||||
|
tls-client
|
||||||
|
tls-version-min 1.2
|
||||||
|
tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
|
||||||
|
setenv opt block-outside-dns
|
||||||
|
verb 3" >> /etc/openvpn/client-template.txt
|
||||||
|
|
||||||
|
# Generate the custom client.ovpn
|
||||||
|
newclient "$CLIENT"
|
||||||
|
echo ""
|
||||||
|
echo "Finished!"
|
||||||
|
echo ""
|
||||||
|
echo "Your client config is available at $homeDir/$CLIENT.ovpn"
|
||||||
|
echo "If you want to add more clients, you simply need to run this script another time!"
|
||||||
|
fi
|
||||||
|
exit 0;
|
||||||
Loading…
Reference in a new issue