mirror of
https://github.com/Nyr/openvpn-install.git
synced 2024-11-27 15:36:07 +03:00
Miscellaneous improvements
This commit contains lots changes which are not very significant on its own but provide important usability improvements and future proofing. It also includes changes which required OpenVPN v2.4+ and were pending until that version became widely available. - General cleanup - Improved IP address and NAT configuration - Added input validation and sanitization - Fix #603 - Remove "sndbuf" and "recvbuf" parameters - Add server-side "explicit-exit-notify" - Switch from "setenv opt" to "ignore-unknown-option" - Switch from "tls-auth" to "tls-crypt" - Other minor bugfixes and optimizations
This commit is contained in:
Nyr
parent
68e48d21b6
commit
6a29a6babd
@ -5,22 +5,22 @@
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# Copyright (c) 2013 Nyr. Released under the MIT License.
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if grep -qs "14.04" "/etc/os-release"; then
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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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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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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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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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@ -44,31 +44,33 @@ You need to enable TUN before running this script"
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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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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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GROUPNAME=nobody
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os="centos"
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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, Ubuntu or CentOS"
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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/server/client-common.txt ~/$1.ovpn
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echo "<ca>" >> ~/$1.ovpn
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cat /etc/openvpn/server/easy-rsa/pki/ca.crt >> ~/$1.ovpn
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echo "</ca>" >> ~/$1.ovpn
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echo "<cert>" >> ~/$1.ovpn
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sed -ne '/BEGIN CERTIFICATE/,$ p' /etc/openvpn/server/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/server/easy-rsa/pki/private/$1.key >> ~/$1.ovpn
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echo "</key>" >> ~/$1.ovpn
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echo "<tls-auth>" >> ~/$1.ovpn
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sed -ne '/BEGIN OpenVPN Static key/,$ p' /etc/openvpn/server/ta.key >> ~/$1.ovpn
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echo "</tls-auth>" >> ~/$1.ovpn
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{
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cat /etc/openvpn/server/client-common.txt
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echo "<ca>"
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cat /etc/openvpn/server/easy-rsa/pki/ca.crt
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echo "</ca>"
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echo "<cert>"
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sed -ne '/BEGIN CERTIFICATE/,$ 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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}
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if [[ -e /etc/openvpn/server/server.conf ]]; then
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@ -82,26 +84,35 @@ if [[ -e /etc/openvpn/server/server.conf ]]; then
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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 CLIENT
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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 $CLIENT nopass
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EASYRSA_CERT_EXPIRE=3650 ./easyrsa build-client-full "$client" nopass
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# Generates the custom client.ovpn
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newclient "$CLIENT"
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new_client "$client"
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echo
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echo "Client $CLIENT added, configuration is available at:" ~/"$CLIENT.ovpn"
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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=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep -c "^V")
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if [[ "$NUMBEROFCLIENTS" = '0' ]]; then
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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
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@ -109,60 +120,68 @@ if [[ -e /etc/openvpn/server/server.conf ]]; then
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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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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=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$CLIENTNUMBER"p)
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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 $CLIENT? [y/N]: " -e REVOKE
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if [[ "$REVOKE" = 'y' || "$REVOKE" = 'Y' ]]; then
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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 $CLIENT
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./easyrsa --batch revoke "$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/$CLIENT.crt
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rm -f pki/reqs/"$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:$GROUPNAME /etc/openvpn/server/crl.pem
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chown nobody:"$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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echo "Certificate for client $client revoked!"
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else
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echo
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echo "Certificate revocation for client $CLIENT aborted!"
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echo "Certificate revocation for client $client aborted!"
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fi
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exit
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;;
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3)
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echo
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read -p "Do you really want to remove OpenVPN? [y/N]: " -e REMOVE
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if [[ "$REMOVE" = 'y' || "$REMOVE" = 'Y' ]]; then
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PORT=$(grep '^port ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
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PROTOCOL=$(grep '^proto ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
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read -p "Do you really want to remove OpenVPN? [y/N]: " remove
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until [[ "$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 --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 --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 "$ip"
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else
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systemctl disable --now openvpn-iptables.service
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rm -f /etc/systemd/system/openvpn-iptables.service
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fi
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if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$PORT" != '1194' ]]; then
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semanage port -d -t openvpn_port_t -p $PROTOCOL $PORT
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if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$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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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 [[ "$OS" = 'debian' ]]; then
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if [[ "$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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@ -180,39 +199,59 @@ if [[ -e /etc/openvpn/server/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 OpenVPN "road warrior" installer!'
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echo "Welcome to this 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 "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=$(ip addr | grep inet | grep -v inet6 | grep -vEc '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')
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echo
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echo "First, provide the IPv4 address of the network interface you want OpenVPN"
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echo "listening to."
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# Autodetect IP address and pre-fill for the user
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IP=$(ip addr | grep 'inet' | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | head -1)
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read -p "IP address: " -e -i $IP IP
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echo "What IPv4 address should the OpenVPN server bind to?"
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ip addr | grep inet | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | nl -s ') '
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read -p "IPv4 address [1]: " ip_number
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until [[ -z "$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
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if echo "$ip" | grep -qE '^(10\.|172\.1[6789]\.|172\.2[0-9]\.|172\.3[01]\.|192\.168)'; then
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echo
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echo "This server is behind NAT. What is the public IPv4 address or hostname?"
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read -p "Public IP address / hostname: " -e PUBLICIP
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get_public_ip=$(wget -4qO- "http://whatismyip.akamai.com/" || curl -4Ls "http://whatismyip.akamai.com/")
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read -p "Public IPv4 address / hostname [$get_public_ip]: " public_ip
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[ -z "$public_ip" ] && public_ip="$get_public_ip"
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fi
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echo
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echo "Which protocol do you want for OpenVPN connections?"
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echo " 1) UDP (recommended)"
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echo " 2) TCP"
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read -p "Protocol [1-2]: " -e -i 1 PROTOCOL
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case $PROTOCOL in
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1)
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PROTOCOL=udp
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read -p "Protocol [1]: " protocol
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until [[ -z "$protocol" || "$protocol" =~ ^[12]$ ]]; do
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echo "$protocol: invalid selection."
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read -p "Protocol [1]: " protocol
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done
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case "$protocol" in
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1|"")
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protocol=udp
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;;
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2)
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PROTOCOL=tcp
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protocol=tcp
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;;
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esac
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echo
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echo "What port do you want OpenVPN listening to?"
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read -p "Port: " -e -i 1194 PORT
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read -p "Port [1194]: " port
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until [[ -z "$port" || "$port" =~ ^[0-9]+$ && "$port" -le 65535 ]]; do
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echo "$port: invalid selection."
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read -p "Port [1194]: " port
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done
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[[ -z "$port" ]] && port="1194"
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echo
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echo "Which DNS do you want to use with the VPN?"
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echo " 1) Current system resolvers"
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@ -220,21 +259,27 @@ else
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echo " 3) Google"
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echo " 4) OpenDNS"
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echo " 5) Verisign"
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read -p "DNS [1-5]: " -e -i 1 DNS
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read -p "DNS [1]: " dns
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until [[ -z "$dns" || "$dns" =~ ^[1-5]$ ]]; do
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echo "$dns: invalid selection."
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read -p "DNS [1]: " dns
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done
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echo
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echo "Finally, tell me your name for the client certificate."
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echo "Please, use one word only, no special characters."
|
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read -p "Client name: " -e -i client CLIENT
|
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echo "Finally, tell me a name for the client certificate."
|
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read -p "Client name [client]: " unsanitized_client
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# Allow a limited set of characters to avoid conflicts
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client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
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[[ -z "$client" ]] && client="client"
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echo
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echo "Okay, that was all I needed. We are ready to set up your OpenVPN server now."
|
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read -n1 -r -p "Press any key to continue..."
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# If running inside a container, disable LimitNPROC to prevent conflicts
|
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if systemd-detect-virt -cq; then
|
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mkdir /etc/systemd/system/openvpn-server@server.service.d/ 2>/dev/null
|
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echo '[Service]
|
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LimitNPROC=infinity' > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
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echo "[Service]
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LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
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fi
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if [[ "$OS" = 'debian' ]]; then
|
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if [[ "$os" = "debian" ]]; then
|
||||
apt-get update
|
||||
apt-get install openvpn iptables openssl ca-certificates -y
|
||||
else
|
||||
@ -243,8 +288,8 @@ LimitNPROC=infinity' > /etc/systemd/system/openvpn-server@server.service.d/disab
|
||||
yum install openvpn iptables openssl ca-certificates -y
|
||||
fi
|
||||
# Get easy-rsa
|
||||
EASYRSAURL='https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.5/EasyRSA-nix-3.0.5.tgz'
|
||||
wget -O ~/easyrsa.tgz "$EASYRSAURL" 2>/dev/null || curl -Lo ~/easyrsa.tgz "$EASYRSAURL"
|
||||
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/
|
||||
@ -255,14 +300,14 @@ LimitNPROC=infinity' > /etc/systemd/system/openvpn-server@server.service.d/disab
|
||||
./easyrsa init-pki
|
||||
./easyrsa --batch build-ca nopass
|
||||
EASYRSA_CERT_EXPIRE=3650 ./easyrsa build-server-full server nopass
|
||||
EASYRSA_CERT_EXPIRE=3650 ./easyrsa build-client-full $CLIENT nopass
|
||||
EASYRSA_CERT_EXPIRE=3650 ./easyrsa build-client-full "$client" nopass
|
||||
EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
|
||||
# Move the stuff we need
|
||||
cp pki/ca.crt pki/private/ca.key pki/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:$GROUPNAME /etc/openvpn/server/crl.pem
|
||||
# Generate key for tls-auth
|
||||
openvpn --genkey --secret /etc/openvpn/server/ta.key
|
||||
chown nobody:"$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
|
||||
@ -273,33 +318,32 @@ YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjcrsZCwenyO4KbXCeAvzhzffi
|
||||
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/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 '#' $RESOLVCONF | grep 'nameserver' | grep -E -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | while read line; do
|
||||
grep -v '#' "$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
|
||||
;;
|
||||
@ -323,12 +367,15 @@ ifconfig-pool-persist ipp.txt" > /etc/openvpn/server/server.conf
|
||||
echo "keepalive 10 120
|
||||
cipher AES-256-CBC
|
||||
user nobody
|
||||
group $GROUPNAME
|
||||
group $group_name
|
||||
persist-key
|
||||
persist-tun
|
||||
status openvpn-status.log
|
||||
verb 3
|
||||
crl-verify crl.pem" >> /etc/openvpn/server/server.conf
|
||||
if [[ "$protocol" = "udp" ]]; then
|
||||
echo "explicit-exit-notify" >> /etc/openvpn/server/server.conf
|
||||
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
|
||||
@ -338,25 +385,25 @@ crl-verify crl.pem" >> /etc/openvpn/server/server.conf
|
||||
# reload.
|
||||
# We don't use --add-service=openvpn because that would only work with
|
||||
# the default port and protocol.
|
||||
firewall-cmd --add-port=$PORT/$PROTOCOL
|
||||
firewall-cmd --add-port="$port"/"$protocol"
|
||||
firewall-cmd --zone=trusted --add-source=10.8.0.0/24
|
||||
firewall-cmd --permanent --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
|
||||
# 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 -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 -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 $port -j ACCEPT
|
||||
ExecStop=/sbin/iptables -D FORWARD -s 10.8.0.0/24 -j ACCEPT
|
||||
ExecStop=/sbin/iptables -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
|
||||
RemainAfterExit=yes
|
||||
@ -365,7 +412,7 @@ WantedBy=multi-user.target" > /etc/systemd/system/openvpn-iptables.service
|
||||
systemctl enable --now openvpn-iptables.service
|
||||
fi
|
||||
# If SELinux is enabled and a custom port was selected, we need this
|
||||
if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$PORT" != '1194' ]]; then
|
||||
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
|
||||
@ -374,21 +421,17 @@ WantedBy=multi-user.target" > /etc/systemd/system/openvpn-iptables.service
|
||||
yum install policycoreutils-python-utils -y
|
||||
fi
|
||||
fi
|
||||
semanage port -a -t openvpn_port_t -p $PROTOCOL $PORT
|
||||
semanage port -a -t openvpn_port_t -p "$protocol" "$port"
|
||||
fi
|
||||
# And finally, enable and start the OpenVPN service
|
||||
systemctl enable --now openvpn-server@server.service
|
||||
# If the server is behind a NAT, use the correct IP address
|
||||
if [[ "$PUBLICIP" != "" ]]; then
|
||||
IP=$PUBLICIP
|
||||
if [[ "$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 $port
|
||||
resolv-retry infinite
|
||||
nobind
|
||||
persist-key
|
||||
@ -396,14 +439,16 @@ persist-tun
|
||||
remote-cert-tls server
|
||||
auth SHA512
|
||||
cipher AES-256-CBC
|
||||
setenv opt block-outside-dns
|
||||
key-direction 1
|
||||
ignore-unknown-option block-outside-dns
|
||||
block-outside-dns
|
||||
verb 3" > /etc/openvpn/server/client-common.txt
|
||||
# Enable and start the OpenVPN service
|
||||
systemctl enable --now openvpn-server@server.service
|
||||
# Generates the custom client.ovpn
|
||||
newclient "$CLIENT"
|
||||
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!"
|
||||
echo "Your client configuration is available at:" ~/"$client.ovpn"
|
||||
echo "If you want to add more clients, just run this script again!"
|
||||
fi
|
||||
|
||||
Loading…
Reference in New Issue
Block a user