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xiagw
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@ -19,38 +19,46 @@ if grep -qs "CentOS release 5" "/etc/redhat-release"; then
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exit 3
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fi
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VAR_LIST(){
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:
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}
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dir_openvpn='/etc/openvpn'
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dir_easy="${dir_openvpn}/easy-rsa"
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bin_easy='${dir_easy}/easyrsa'
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file_client_tpl='${dir_openvpn}/client-template.txt'
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file_openvpn_conf='${dir_openvpn}/server.conf'
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IPTABLES='/etc/iptables/iptables.rules'
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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 '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 ''
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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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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 [[ 'y' != $CONTINUE && 'n' != $CONTINUE ]]; do
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read -p 'Continue ? [y/n]: ' -e CONTINUE
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done
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if [[ "$CONTINUE" = "n" ]]; then
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echo "Ok, bye !"
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if [[ 'n' = "$CONTINUE" ]]; then
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echo 'Ok, bye !'
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exit 4
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fi
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fi
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elif [[ -e /etc/centos-release || -e /etc/redhat-release && ! -e /etc/fedora-release ]]; then
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OS=centos
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IPTABLES='/etc/iptables/iptables.rules'
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OS='centos'
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SYSCTL='/etc/sysctl.conf'
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elif [[ -e /etc/arch-release ]]; then
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OS=arch
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IPTABLES='/etc/iptables/iptables.rules'
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OS='arch'
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SYSCTL='/etc/sysctl.d/openvpn.conf'
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elif [[ -e /etc/fedora-release ]]; then
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OS=fedora
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IPTABLES='/etc/iptables/iptables.rules'
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OS='fedora'
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SYSCTL='/etc/sysctl.d/openvpn.conf'
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else
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echo "Looks like you aren't running this installer on a Debian, Ubuntu, CentOS or ArchLinux system"
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@ -70,17 +78,17 @@ newclient () {
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file_client="$homeDir/$1.ovpn"
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cp ${file_client_tpl} ${file_client}
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echo "<ca>" >> ${file_client}
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cat /etc/openvpn/easy-rsa/pki/ca.crt >> ${file_client}
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cat ${dir_easy}/pki/ca.crt >> ${file_client}
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echo "</ca>" >> ${file_client}
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echo "<cert>" >> ${file_client}
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cat /etc/openvpn/easy-rsa/pki/issued/$1.crt >> ${file_client}
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cat ${dir_easy}/pki/issued/$1.crt >> ${file_client}
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echo "</cert>" >> ${file_client}
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echo "<key>" >> ${file_client}
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cat /etc/openvpn/easy-rsa/pki/private/$1.key >> ${file_client}
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cat ${dir_easy}/pki/private/$1.key >> ${file_client}
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echo "</key>" >> ${file_client}
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echo "key-direction 1" >> ${file_client}
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echo "<tls-auth>" >> ${file_client}
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cat /etc/openvpn/tls-auth.key >> ${file_client}
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cat ${dir_openvpn}/tls-auth.key >> ${file_client}
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echo "</tls-auth>" >> ${file_client}
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}
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@ -94,28 +102,30 @@ fi
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# Get Internet network interface with default route
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NIC=$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1)
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if [[ -e /etc/openvpn/server.conf ]]; then
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if [[ -e ${file_openvpn_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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cat <<'EOF'
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OpenVPN-install (github.com/Angristan/OpenVPN-install)
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Looks like OpenVPN is already installed
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What do you want to do?
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1) Add a cert for a new user
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2) Revoke existing user cert
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3) Remove OpenVPN
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4) Exit
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EOF
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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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cd ${dir_easy}
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${bin_easy} 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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@ -123,7 +133,8 @@ 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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NUMBEROFCLIENTS=$(tail -n +2 /etc/openvpn/easy-rsa/pki/index.txt | grep -c "^V")
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file_index="${dir_easy}/pki/index.txt"
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NUMBEROFCLIENTS=$(tail -n +2 ${file_index} | grep -c "^V")
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if [[ "$NUMBEROFCLIENTS" = '0' ]]; then
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echo ""
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echo "You have no existing clients!"
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@ -131,22 +142,22 @@ if [[ -e /etc/openvpn/server.conf ]]; then
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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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tail -n +2 ${file_index} | grep "^V" | cut -d '=' -f 2 | nl -s ') '
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if [[ "$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 $CLIENT
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EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
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CLIENT=$(tail -n +2 ${file_index} | grep "^V" | cut -d '=' -f 2 | sed -n "$CLIENTNUMBER"p)
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cd ${dir_easy}
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${bin_easy} --batch revoke $CLIENT
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EASYRSA_CRL_DAYS=3650 ${bin_easy} gen-crl
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rm -rf pki/reqs/$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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cp ${dir_easy}/pki/crl.pem ${dir_openvpn}/crl.pem
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chmod 644 ${dir_openvpn}/crl.pem
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echo ""
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echo "Certificate for client $CLIENT revoked"
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echo "Exiting..."
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@ -155,8 +166,8 @@ if [[ -e /etc/openvpn/server.conf ]]; then
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3)
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echo ""
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read -p "Do you really want to remove OpenVPN? [y/n]: " -e -i n REMOVE
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if [[ "$REMOVE" = 'y' ]]; then
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PORT=$(grep '^port ' /etc/openvpn/server.conf | cut -d " " -f 2)
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if [[ 'y' = "$REMOVE" ]]; then
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PORT=$(grep '^port ' ${file_openvpn_conf} | cut -d " " -f 2)
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if pgrep firewalld; then
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# Using both permanent and not permanent rules to avoid a firewalld reload.
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firewall-cmd --zone=public --remove-port=$PORT/udp
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@ -189,7 +200,7 @@ if [[ -e /etc/openvpn/server.conf ]]; then
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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 ${dir_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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@ -202,17 +213,21 @@ if [[ -e /etc/openvpn/server.conf ]]; then
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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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fi
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## OpenVPN setup and first user creation
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if [[ ! -e ${file_openvpn_conf} ]]; then
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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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cat <<EOF
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Welcome to the secure OpenVPN installer (github.com/Angristan/OpenVPN-install)
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I need to ask you a few questions before starting the setup
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You can leave the default options and just press enter if you are ok with them
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"
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I need to know the IPv4 address of the network interface you want OpenVPN listening to.
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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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Otherwise, it should be your public IPv4 address.
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EOF
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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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@ -223,35 +238,37 @@ else
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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 (from /etc/resolv.conf)"
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echo " 2) Quad9 (Anycast: worldwide)"
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echo " 3) FDN (France)"
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echo " 4) DNS.WATCH (Germany)"
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echo " 5) OpenDNS (Anycast: worldwide)"
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echo " 6) Google (Anycast: worldwide)"
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echo " 7) Yandex Basic (Russia)"
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echo " 8) AdGuard DNS (Russia)"
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cat <<EOF
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What DNS do you want to use with the VPN?
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1) Current system resolvers (from /etc/resolv.conf)
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2) Quad9 (Anycast: worldwide)
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3) FDN (France)
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4) DNS.WATCH (Germany)
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5) OpenDNS (Anycast: worldwide)
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6) Google (Anycast: worldwide)
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7) Yandex Basic (Russia)
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8) AdGuard DNS (Russia)
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EOF
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while [[ $DNS != "1" && $DNS != "2" && $DNS != "3" && $DNS != "4" && $DNS != "5" && $DNS != "6" && $DNS != "7" && $DNS != "8" ]]; do
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read -p "DNS [1-8]: " -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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cat <<EOF
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See https://github.com/Angristan/OpenVPN-install#encryption to learn more about
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the encryption in OpenVPN and the choices I made in this script.
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Please note that all the choices proposed are secure (to a different degree)
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and are still viable to date, unlike some default OpenVPN options
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Choose which cipher you want to use for the data channel:
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1) AES-128-CBC (fastest and sufficiently secure for everyone, recommended)
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2) AES-192-CBC
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3) AES-256-CBC
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Alternatives to AES, use them only if you know what you're doing.
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They are relatively slower but as secure as AES.
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4) CAMELLIA-128-CBC
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5) CAMELLIA-192-CBC
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6) CAMELLIA-256-CBC
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7) SEED-CBC
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EOF
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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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@ -659,7 +676,6 @@ verb 3" >> /etc/openvpn/server.conf
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fi
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fi
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# client-template.txt is created so we have a template to add further users later
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file_client_tpl=/etc/openvpn/client-template.txt
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echo "client" > ${file_client_tpl}
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if [[ "$PROTOCOL" = 'UDP' ]]; then
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echo "proto udp" >> ${file_client_tpl}
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@ -680,7 +696,7 @@ tls-client
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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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setenv opt block-outside-dns
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verb 3" >> /etc/openvpn/client-template.txt
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verb 3" >> ${file_client_tpl}
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# Generate the custom client.ovpn
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newclient "$CLIENT"
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