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https://github.com/namibia/openvpn-install.git
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Some cleanup
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Angristan
GitHub
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commit
3f58eb781c
@ -1,11 +1,7 @@
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#!/bin/bash
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# OpenVPN road warrior installer for Debian, Ubuntu and CentOS
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# This script will work on Debian, Ubuntu, CentOS and probably other distros
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# of the same families, although no support is offered for them. It isn't
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# bulletproof but it will probably work if you simply want to setup a VPN on
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# your Debian/Ubuntu/CentOS box. It has been designed to be as unobtrusive and
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# universal as possible.
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# Secure OpenVPN server installer for Debian, Ubuntu and CentOS.
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# https://github.com/Angristan/OpenVPN-install
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if [[ "$EUID" -ne 0 ]]; then
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@ -13,13 +9,11 @@ if [[ "$EUID" -ne 0 ]]; then
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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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@ -27,11 +21,12 @@ fi
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if [[ -e /etc/debian_version ]]; then
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OS="debian"
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#We get the version number, to verify we can get a recent version of OpenVPN
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# Getting the version number, to verify that a recent version of OpenVPN is available
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VERSION_ID=$(cat /etc/*-release | grep "VERSION_ID")
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RCLOCAL='/etc/rc.local'
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if [[ "$VERSION_ID" != 'VERSION_ID="7"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="8"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="12.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="14.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.10"' ]]; then
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echo "Your version of Debian/Ubuntu is not supported. Please look at the documentation."
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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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exit 4
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fi
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elif [[ -e /etc/centos-release || -e /etc/redhat-release ]]; then
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@ -62,7 +57,6 @@ newclient () {
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echo "</tls-auth>" >> ~/$1.ovpn
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}
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# Try to get our IP from the system and fallback to the Internet.
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# I do this to make the script compatible with NATed servers (LowEndSpirit/Scaleway)
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# and to avoid getting an IPv6.
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@ -71,7 +65,6 @@ if [[ "$IP" = "" ]]; then
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IP=$(wget -qO- ipv4.icanhazip.com)
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fi
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if [[ -e /etc/openvpn/server.conf ]]; then
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while :
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do
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@ -99,8 +92,6 @@ if [[ -e /etc/openvpn/server.conf ]]; then
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exit
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;;
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2)
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# This option could be documented a bit better and maybe even be simplimplified
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# ...but what can I say, I want some sleep too
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NUMBEROFCLIENTS=$(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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@ -180,23 +171,23 @@ 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 'Welcome to the secure OpenVPN 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, choose which variant of the script you want to use."
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echo '"Fast" is secure, but "slow" is the best encryption you can get, at the cost of speed (not that slow though)'
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echo '"Fast" is secure, but "slow" provides you the best encryption you can get,'
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echo "at the cost of some speed (not that slow though)"
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echo " 1) Fast (2048 bits RSA and DH, 128 bits AES)"
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echo " 2) Slow (4096 bits RSA and DH, 256 bits AES)"
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while [[ $VARIANT != "1" && $VARIANT != "2" ]]; do
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read -p "Variant [1-2]: " -e -i 1 VARIANT
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done
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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 you server is running behind a NAT, (e.g. LowEndSpirit, Scaleway) leave the IP adress as it is. (local/private IP"
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echo "If you server is running behind a NAT, (e.g. LowEndSpirit, Scaleway) leave the IP adress as it is. (local/private IP)"
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echo "Otherwise, it sould 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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@ -205,7 +196,7 @@ else
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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"
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echo " 2) FDN (recommended)"
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echo " 2) FDN"
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echo " 3) OpenNIC"
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echo " 4) DNS.WATCH"
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echo " 5) OpenDNS"
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@ -220,7 +211,7 @@ else
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read -p "Forwarding type: " -e -i 1 FORWARD_TYPE
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done
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echo ""
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echo "Finally, tell me your name for the client cert"
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echo "Finally, tell me a name for the client certificate and configuration"
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while [[ $CLIENT = "" ]]; do
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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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@ -255,15 +246,15 @@ else
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wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg | apt-key add -
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apt-get update
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fi
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# The repo, is not available for Ubuntu 15.10 and 16.04, but it has OpenVPN > 2.3.3, so we do nothing.
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# The we install OpnVPN
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# Ubuntu >= 16.04 have OpenVPN > 2.3.3 without the need of a third party repository.
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# The we install OpenVPN
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apt-get install openvpn iptables openssl wget ca-certificates curl -y
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else
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# Else, the distro is CentOS
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yum install epel-release -y
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yum install openvpn iptables openssl wget ca-certificates curl -y
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fi
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# find out if the machine uses nogroup or nobody for the permissionless group
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# Find out if the machine uses nogroup or nobody for the permissionless group
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if grep -qs "^nogroup:" /etc/group; then
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NOGROUP=nogroup
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else
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@ -301,7 +292,7 @@ set_var EASYRSA_DIGEST "sha384"" > vars
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./easyrsa gen-crl
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# generate tls-auth key
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openvpn --genkey --secret /etc/openvpn/tls-auth.key
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# Move the stuff we need
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# Move all the generated files
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cp pki/ca.crt pki/private/ca.key pki/dh.pem pki/issued/server.crt pki/private/server.key /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn
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# Make cert revocation list readable for non-root
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chmod 644 /etc/openvpn/crl.pem
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@ -325,11 +316,11 @@ tls-version-min 1.2" > /etc/openvpn/server.conf
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# If the user selected the fast, less hardened version
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echo "tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256" >> /etc/openvpn/server.conf
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elif [[ "$VARIANT" = '2' ]]; then
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# If the user selected the relatively slow, ultra hardened version
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# If the user selected the relatively slow, hardened version
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echo "tls-cipher TLS-DHE-RSA-WITH-AES-256-GCM-SHA384" >> /etc/openvpn/server.conf
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fi
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echo 'push "redirect-gateway def1 bypass-dhcp"' >> /etc/openvpn/server.conf
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# DNS
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# DNS resolvers
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case $DNS in
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1)
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# Obtain the resolvers from resolv.conf and use them for OpenVPN
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@ -473,10 +464,10 @@ tls-client" > /etc/openvpn/client-common.txt
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# If the user selected the fast, less hardened version
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echo "tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256" >> /etc/openvpn/client-common.txt
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elif [[ "$VARIANT" = '2' ]]; then
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# If the user selected the relatively slow, ultra hardened version
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# If the user selected the relatively slow, hardened version
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echo "tls-cipher TLS-DHE-RSA-WITH-AES-256-GCM-SHA384" >> /etc/openvpn/client-common.txt
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fi
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# Generates the custom client.ovpn
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# Generate the custom client.ovpn
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newclient "$CLIENT"
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echo ""
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echo "Finished!"
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