diff --git a/openvpn-install.sh b/openvpn-install.sh
index ff1d0db..bab5381 100644
--- a/openvpn-install.sh
+++ b/openvpn-install.sh
@@ -3,7 +3,7 @@
# https://github.com/Nyr/openvpn-install
#
# Copyright (c) 2013 Nyr. Released under the MIT License.
-
+# Slackware support added by JWSmythe v20231028.2034
# Detect Debian users running the script with "sh" instead of bash
if readlink /proc/$$/exe | grep -q "dash"; then
@@ -13,7 +13,7 @@ fi
# Discard stdin. Needed when running from an one-liner which includes a newline
read -N 999999 -t 0.001
-
+
# Detect OpenVZ 6
if [[ $(uname -r | cut -d "." -f 1) -eq 2 ]]; then
echo "The system is running an old kernel, which is incompatible with this installer."
@@ -38,9 +38,13 @@ elif [[ -e /etc/fedora-release ]]; then
os="fedora"
os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1)
group_name="nobody"
+elif grep -qs "slackware" /etc/os-release; then
+ os="slackware"
+ os_version=$(grep 'VERSION_ID' /etc/os-release | cut -d '"' -f 2 | tr -d '.')
+ group_name="nobody"
else
echo "This installer seems to be running on an unsupported distribution.
-Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora."
+Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS, Fedora, and Slackware."
exit
fi
@@ -68,6 +72,12 @@ This version of CentOS is too old and unsupported."
exit
fi
+if [[ "$os" == "slackware" && "$os_version" -lt 14 ]]; then
+ echo "Slackware 14.0 or higher is required to use this installer.
+This version of Slackware is too old and unsupported."
+ exit
+fi
+
# Detect environments where $PATH does not include the sbin directories
if ! grep -q sbin <<< "$PATH"; then
echo '$PATH does not include sbin. Try using "su -" instead of "su".'
@@ -85,6 +95,13 @@ TUN needs to be enabled before running this installer."
exit
fi
+# Slackware's OpenVPN install doesn't include the server directory. Create it.
+if [[ "$os" == "slackware" ]]; then
+ if [ ! -d /etc/openvpn/server ]; then
+ mkdir /etc/openvpn/server
+ fi
+fi
+
new_client () {
# Generates the custom client.ovpn
{
@@ -130,7 +147,7 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
[[ -z "$ip_number" ]] && ip_number="1"
ip=$(ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | sed -n "$ip_number"p)
fi
- # If $ip is a private IP address, the server must be behind NAT
+ # If $ip is a private IP address, the server must be behind NAT
if echo "$ip" | grep -qE '^(10\.|172\.1[6789]\.|172\.2[0-9]\.|172\.3[01]\.|192\.168)'; then
echo
echo "This server is behind NAT. What is the public IPv4 address or hostname?"
@@ -208,18 +225,25 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
[[ -z "$client" ]] && client="client"
echo
echo "OpenVPN installation is ready to begin."
- # Install a firewall if firewalld or iptables are not already available
- if ! systemctl is-active --quiet firewalld.service && ! hash iptables 2>/dev/null; then
- if [[ "$os" == "centos" || "$os" == "fedora" ]]; then
- firewall="firewalld"
- # We don't want to silently enable firewalld, so we give a subtle warning
- # If the user continues, firewalld will be installed and enabled during setup
- echo "firewalld, which is required to manage routing tables, will also be installed."
- elif [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
- # iptables is way less invasive than firewalld so no warning is given
- firewall="iptables"
- fi
- fi
+
+ if [[ "$os" == "slackware" ]]; then
+ # No systemctl for Slackware. Can't use the test.
+ firewall="iptables"
+ else
+ # Install a firewall if firewalld or iptables are not already available
+ if ! systemctl is-active --quiet firewalld.service && ! hash iptables 2>/dev/null; then
+ if [[ "$os" == "centos" || "$os" == "fedora" ]]; then
+ firewall="firewalld"
+ # We don't want to silently enable firewalld, so we give a subtle warning
+ # If the user continues, firewalld will be installed and enabled during setup
+ echo "firewalld, which is required to manage routing tables, will also be installed."
+ elif [[ "$os" == "debian" || "$os" == "ubuntu" || "$os" == "slackware" ]]; then
+ # iptables is way less invasive than firewalld so no warning is given
+ firewall="iptables"
+ fi
+ fi
+ fi
+
read -n1 -r -p "Press any key to continue..."
# If running inside a container, disable LimitNPROC to prevent conflicts
if systemd-detect-virt -cq; then
@@ -227,12 +251,14 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
echo "[Service]
LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
fi
- if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
+ if [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
apt-get update
apt-get install -y --no-install-recommends openvpn openssl ca-certificates $firewall
- elif [[ "$os" = "centos" ]]; then
+ elif [[ "$os" == "centos" ]]; then
yum install -y epel-release
yum install -y openvpn openssl ca-certificates tar $firewall
+ elif [[ "$os" == "slackware" ]]; then
+ slackpkg install openvpn openssl ca-certificates tar $firewall
else
# Else, OS must be Fedora
dnf install -y openvpn openssl ca-certificates tar $firewall
@@ -271,16 +297,21 @@ YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjcrsZCwenyO4KbXCeAvzhzffi
ssbzSibBsu/6iGtCOGEoXJf//////////wIBAg==
-----END DH PARAMETERS-----' > /etc/openvpn/server/dh.pem
# Generate server.conf
+ # Note -JWS 20231027 server.conf should always have full paths to the
+ # config files. Relative paths failed with Slackware's rc.openvpn, if it
+ # is called from outside of the /etc/openvpn/server directory. This should
+ # help users on other distros too.
+
echo "local $ip
port $port
proto $protocol
dev tun
-ca ca.crt
-cert server.crt
-key server.key
-dh dh.pem
+ca /etc/openvpn/server/ca.crt
+cert /etc/openvpn/server/server.crt
+key /etc/openvpn/server/server.key
+dh /etc/openvpn/server/dh.pem
auth SHA512
-tls-crypt tc.key
+tls-crypt /etc/openvpn/server/tc.key
topology subnet
server 10.8.0.0 255.255.255.0" > /etc/openvpn/server/server.conf
# IPv6
@@ -334,12 +365,18 @@ group $group_name
persist-key
persist-tun
verb 3
-crl-verify crl.pem" >> /etc/openvpn/server/server.conf
+crl-verify /etc/openvpn/server/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/99-openvpn-forward.conf
+ if [[ "$os" == "slackware" ]]; then
+ echo "Enabling /etc/rc.d/rc.ip_forward.
+ "
+ chmod 755 /etc/rc.d/rc.ip_forward
+ /etc/rc.d/rc.ip_forward start
+ fi
# Enable without waiting for a reboot or service restart
echo 1 > /proc/sys/net/ipv4/ip_forward
if [[ -n "$ip6" ]]; then
@@ -348,7 +385,14 @@ crl-verify crl.pem" >> /etc/openvpn/server/server.conf
# Enable without waiting for a reboot or service restart
echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
fi
- if systemctl is-active --quiet firewalld.service; then
+ if [[ "$os" == "slackware" ]]; then
+ echo "
+ *** Slackware Admins: Disregard systemctl, systemd, and firewall-cmd errors below. ***
+ "
+ fi
+
+ if systemctl is-active --quiet firewalld.service; then
+ # if systemctl is-active --quiet firewalld.service && [[ "$os" != "slackware" ]]; then
# Using both permanent and not permanent rules to avoid a firewalld
# reload.
# We don't use --add-service=openvpn because that would only work with
@@ -401,6 +445,83 @@ ExecStop=$ip6tables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCE
WantedBy=multi-user.target" >> /etc/systemd/system/openvpn-iptables.service
systemctl enable --now openvpn-iptables.service
fi
+ if [[ "$os" == "slackware" ]]; then
+ out="#!/bin/sh
+# Start/stop/restart the OpenVPN Routing
+# 20231025 JWSmythe (https://jwsmythe.com) for https://github.com/Nyr/openvpn-install
+# Copyright (c) 2013 Nyr. Released under the MIT License.
+
+routing_start() {
+ $iptables_path -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ip
+ $iptables_path -I INPUT -p $protocol --dport $port -j ACCEPT
+ $iptables_path -I FORWARD -s 10.8.0.0/24 -j ACCEPT
+ $iptables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
+"
+ if [[ -n "$ip6" ]]; then
+ out+="
+ $ip6tables_path -t nat -A POSTROUTING -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to $ip6
+ $ip6tables_path -I FORWARD -s fddd:1194:1194:1194::/64 -j ACCEPT
+ $ip6tables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
+"
+ fi
+
+out+="}
+
+routing_stop() {
+ $iptables_path -t nat -D POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ip
+ $iptables_path -D INPUT -p $protocol --dport $port -j ACCEPT
+ $iptables_path -D FORWARD -s 10.8.0.0/24 -j ACCEPT
+ $iptables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
+ $iptables_path -F
+ $iptables_path -t nat -F
+"
+
+ if [[ -n "$ip6" ]]; then
+ out+="
+ $ip6tables_path -t nat -D POSTROUTING -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to $ip6
+ $ip6tables_path -D FORWARD -s fddd:1194:1194:1194::/64 -j ACCEPT
+ $ip6tables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
+ $ip6tables_path -F
+ $ip6tables_path -t nat -F
+ "
+ fi
+
+ out+="}
+
+routing_restart() {
+ routing_stop
+ sleep 1
+ routing_start
+}
+
+case \"\$1\" in
+'start')
+ routing_start
+ ;;
+'stop')
+ routing_stop
+ ;;
+'restart')
+ routing_restart
+ ;;
+*)
+ echo \"usage $0 start|stop|restart\"
+esac
+"
+ if [[ ! -f /etc/rc.d/rc.ovpn_routing ]]; then
+ echo "Writing startup routing to /etc/rc.d/rc.ovpn_routing"
+ echo "$out" > /etc/rc.d/rc.ovpn_routing
+ chmod 755 /etc/rc.d/rc.ovpn_routing
+ /etc/rc.d/rc.ovpn_routing
+ else
+ echo "!!! Writing startup routing to /etc/rc.d/rc.ovpn_routing.new !!!"
+ echo " You need to copy it over and run it."
+ echo "$out" > /etc/rc.d/rc.ovpn_routing.new
+ fi
+
+
+ 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
# Install semanage if not already present
@@ -431,7 +552,17 @@ auth SHA512
ignore-unknown-option block-outside-dns
verb 3" > /etc/openvpn/server/client-common.txt
# Enable and start the OpenVPN service
- systemctl enable --now openvpn-server@server.service
+ if [[ "$os" == "slackware" ]]; then
+ echo "iii Starting up services. rc.openvpn and rc.ovpn_routing "
+ echo "!!! You need to add them to rc.local, so they will run at boot time !!!"
+ # Make sure they're executable
+ chmod 755 /etc/rc.d/rc.openvpn
+ chmod 755 /etc/rc.d/rc.ovpn_routing
+ /etc/rc.d/rc.openvpn start /etc/openvpn/server/server.conf
+ /etc/rc.d/rc.ovpn_routing start
+ else
+ systemctl enable --now openvpn-server@server.service
+ fi
# Generates the custom client.ovpn
new_client
echo
@@ -439,6 +570,33 @@ verb 3" > /etc/openvpn/server/client-common.txt
echo
echo "The client configuration is available in:" ~/"$client.ovpn"
echo "New clients can be added by running this script again."
+
+ if [[ "$os" == "slackware" ]]; then
+ echo "
+ ************************************************************
+ !!!!! Slackware Admins !!!!!
+ ************************************************************
+ If this isn't the first time you've run this script, you may need to
+ overwrite rc.ovpn_routing with rc.ovpn_routing.new. It was left in case
+ you made customizations.
+
+ You need to add these lines to the end of your /etc/rc.d/rc.local,
+ so OpenVPN will start, and it will route the VPN clients correctly.
+
+ #==== Begin /etc/rc.d/rc.local lines =======================
+ # Start OpenVPN Server
+ if [ -x /etc/rc.d/rc.openvpn ]; then
+ . /etc/rc.d/rc.openvpn start /etc/openvpn/server/server.conf
+ fi
+
+ # Start OpenVPN Routing
+ if [ -x /etc/rc.d/rc.ovpn_routing ]; then
+ . /etc/rc.d/rc.ovpn_routing start
+ fi
+ #===== END /etc/rc.d/rc.local lines ========================
+ ************************************************************
+ "
+ fi
else
clear
echo "OpenVPN is already installed."
@@ -522,40 +680,53 @@ else
if [[ "$remove" =~ ^[yY]$ ]]; then
port=$(grep '^port ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
protocol=$(grep '^proto ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
- if systemctl is-active --quiet firewalld.service; then
- ip=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.8.0.0/24 '"'"'!'"'"' -d 10.8.0.0/24' | grep -oE '[^ ]+$')
- # Using both permanent and not permanent rules to avoid a firewalld reload.
- firewall-cmd --remove-port="$port"/"$protocol"
- firewall-cmd --zone=trusted --remove-source=10.8.0.0/24
- firewall-cmd --permanent --remove-port="$port"/"$protocol"
- firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24
- 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"
- 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"
- if grep -qs "server-ipv6" /etc/openvpn/server/server.conf; then
- ip6=$(firewall-cmd --direct --get-rules ipv6 nat POSTROUTING | grep '\-s fddd:1194:1194:1194::/64 '"'"'!'"'"' -d fddd:1194:1194:1194::/64' | grep -oE '[^ ]+$')
- firewall-cmd --zone=trusted --remove-source=fddd:1194:1194:1194::/64
- firewall-cmd --permanent --zone=trusted --remove-source=fddd:1194:1194:1194::/64
- firewall-cmd --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
- firewall-cmd --permanent --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
- fi
- else
- systemctl disable --now openvpn-iptables.service
- rm -f /etc/systemd/system/openvpn-iptables.service
- fi
- if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 1194 ]]; then
- semanage port -d -t openvpn_port_t -p "$protocol" "$port"
- fi
- systemctl disable --now openvpn-server@server.service
- rm -f /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
- rm -f /etc/sysctl.d/99-openvpn-forward.conf
- if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
- rm -rf /etc/openvpn/server
- apt-get remove --purge -y openvpn
- else
- # Else, OS must be CentOS or Fedora
- yum remove -y openvpn
- rm -rf /etc/openvpn/server
- fi
+ if [[ "$os" == "slackware" ]]; then
+ # Re-enabling so the stops will work. Disabling immediately after.
+ chmod 755 /etc/rc.d/rc.openvpn
+ chmod 755 /etc/rc.d/rc.ovpn_routing
+ /etc/rc.d/rc.ovpn_routing stop
+ /etc/rc.d/rc.openvpn stop
+ rm -rf /etc/openvpn/server
+ chmod 644 /etc/rc.d/rc.openvpn
+ chmod 644 /etc/rc.d/rc.ovpn_routing
+ # We're not uninstalling anything. The user can if they want.
+ # slackpkg remove openvpn
+ else
+ if systemctl is-active --quiet firewalld.service; then
+ ip=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.8.0.0/24 '"'"'!'"'"' -d 10.8.0.0/24' | grep -oE '[^ ]+$')
+ # Using both permanent and not permanent rules to avoid a firewalld reload.
+ firewall-cmd --remove-port="$port"/"$protocol"
+ firewall-cmd --zone=trusted --remove-source=10.8.0.0/24
+ firewall-cmd --permanent --remove-port="$port"/"$protocol"
+ firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24
+ 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"
+ 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"
+ if grep -qs "server-ipv6" /etc/openvpn/server/server.conf; then
+ ip6=$(firewall-cmd --direct --get-rules ipv6 nat POSTROUTING | grep '\-s fddd:1194:1194:1194::/64 '"'"'!'"'"' -d fddd:1194:1194:1194::/64' | grep -oE '[^ ]+$')
+ firewall-cmd --zone=trusted --remove-source=fddd:1194:1194:1194::/64
+ firewall-cmd --permanent --zone=trusted --remove-source=fddd:1194:1194:1194::/64
+ firewall-cmd --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
+ firewall-cmd --permanent --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
+ fi
+ else
+ systemctl disable --now openvpn-iptables.service
+ rm -f /etc/systemd/system/openvpn-iptables.service
+ fi
+ if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 1194 ]]; then
+ semanage port -d -t openvpn_port_t -p "$protocol" "$port"
+ fi
+ systemctl disable --now openvpn-server@server.service
+ rm -f /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
+ rm -f /etc/sysctl.d/99-openvpn-forward.conf
+ if [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
+ rm -rf /etc/openvpn/server
+ apt-get remove --purge -y openvpn
+ else
+ # Else, OS must be CentOS or Fedora
+ yum remove -y openvpn
+ rm -rf /etc/openvpn/server
+ fi
+ fi
echo
echo "OpenVPN removed!"
else
@@ -568,4 +739,4 @@ else
exit
;;
esac
-fi
+fi
\ No newline at end of file
diff --git a/openvpn-install.sh.diff b/openvpn-install.sh.diff
new file mode 100644
index 0000000..7fb6984
--- /dev/null
+++ b/openvpn-install.sh.diff
@@ -0,0 +1,331 @@
+--- openvpn-install.sh.orig 2023-11-04 23:10:18.964945448 -0400
++++ openvpn-install.sh 2023-11-04 23:13:50.088945866 -0400
+@@ -3,7 +3,7 @@
+ # https://github.com/Nyr/openvpn-install
+ #
+ # Copyright (c) 2013 Nyr. Released under the MIT License.
+-
++# Slackware support added by JWSmythe v20231028.2034
+
+ # Detect Debian users running the script with "sh" instead of bash
+ if readlink /proc/$$/exe | grep -q "dash"; then
+@@ -38,9 +38,13 @@
+ os="fedora"
+ os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1)
+ group_name="nobody"
++elif grep -qs "slackware" /etc/os-release; then
++ os="slackware"
++ os_version=$(grep 'VERSION_ID' /etc/os-release | cut -d '"' -f 2 | tr -d '.')
++ group_name="nobody"
+ else
+ echo "This installer seems to be running on an unsupported distribution.
+-Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora."
++Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS, Fedora, and Slackware."
+ exit
+ fi
+
+@@ -68,6 +72,12 @@
+ exit
+ fi
+
++if [[ "$os" == "slackware" && "$os_version" -lt 14 ]]; then
++ echo "Slackware 14.0 or higher is required to use this installer.
++This version of Slackware is too old and unsupported."
++ exit
++fi
++
+ # Detect environments where $PATH does not include the sbin directories
+ if ! grep -q sbin <<< "$PATH"; then
+ echo '$PATH does not include sbin. Try using "su -" instead of "su".'
+@@ -85,6 +95,13 @@
+ exit
+ fi
+
++# Slackware's OpenVPN install doesn't include the server directory. Create it.
++if [[ "$os" == "slackware" ]]; then
++ if [ ! -d /etc/openvpn/server ]; then
++ mkdir /etc/openvpn/server
++ fi
++fi
++
+ new_client () {
+ # Generates the custom client.ovpn
+ {
+@@ -208,6 +225,11 @@
+ [[ -z "$client" ]] && client="client"
+ echo
+ echo "OpenVPN installation is ready to begin."
++
++ if [[ "$os" == "slackware" ]]; then
++ # No systemctl for Slackware. Can't use the test.
++ firewall="iptables"
++ else
+ # Install a firewall if firewalld or iptables are not already available
+ if ! systemctl is-active --quiet firewalld.service && ! hash iptables 2>/dev/null; then
+ if [[ "$os" == "centos" || "$os" == "fedora" ]]; then
+@@ -215,11 +237,13 @@
+ # We don't want to silently enable firewalld, so we give a subtle warning
+ # If the user continues, firewalld will be installed and enabled during setup
+ echo "firewalld, which is required to manage routing tables, will also be installed."
+- elif [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
++ elif [[ "$os" == "debian" || "$os" == "ubuntu" || "$os" == "slackware" ]]; then
+ # iptables is way less invasive than firewalld so no warning is given
+ firewall="iptables"
+ fi
+ fi
++ fi
++
+ read -n1 -r -p "Press any key to continue..."
+ # If running inside a container, disable LimitNPROC to prevent conflicts
+ if systemd-detect-virt -cq; then
+@@ -227,12 +251,14 @@
+ echo "[Service]
+ LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
+ fi
+- if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
++ if [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
+ apt-get update
+ apt-get install -y --no-install-recommends openvpn openssl ca-certificates $firewall
+- elif [[ "$os" = "centos" ]]; then
++ elif [[ "$os" == "centos" ]]; then
+ yum install -y epel-release
+ yum install -y openvpn openssl ca-certificates tar $firewall
++ elif [[ "$os" == "slackware" ]]; then
++ slackpkg install openvpn openssl ca-certificates tar $firewall
+ else
+ # Else, OS must be Fedora
+ dnf install -y openvpn openssl ca-certificates tar $firewall
+@@ -271,16 +297,21 @@
+ ssbzSibBsu/6iGtCOGEoXJf//////////wIBAg==
+ -----END DH PARAMETERS-----' > /etc/openvpn/server/dh.pem
+ # Generate server.conf
++ # Note -JWS 20231027 server.conf should always have full paths to the
++ # config files. Relative paths failed with Slackware's rc.openvpn, if it
++ # is called from outside of the /etc/openvpn/server directory. This should
++ # help users on other distros too.
++
+ echo "local $ip
+ port $port
+ proto $protocol
+ dev tun
+-ca ca.crt
+-cert server.crt
+-key server.key
+-dh dh.pem
++ca /etc/openvpn/server/ca.crt
++cert /etc/openvpn/server/server.crt
++key /etc/openvpn/server/server.key
++dh /etc/openvpn/server/dh.pem
+ auth SHA512
+-tls-crypt tc.key
++tls-crypt /etc/openvpn/server/tc.key
+ topology subnet
+ server 10.8.0.0 255.255.255.0" > /etc/openvpn/server/server.conf
+ # IPv6
+@@ -334,12 +365,18 @@
+ persist-key
+ persist-tun
+ verb 3
+-crl-verify crl.pem" >> /etc/openvpn/server/server.conf
++crl-verify /etc/openvpn/server/crl.pem" >> /etc/openvpn/server/server.conf
+ if [[ "$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/99-openvpn-forward.conf
++ if [[ "$os" == "slackware" ]]; then
++ echo "Enabling /etc/rc.d/rc.ip_forward.
++ "
++ chmod 755 /etc/rc.d/rc.ip_forward
++ /etc/rc.d/rc.ip_forward start
++ fi
+ # Enable without waiting for a reboot or service restart
+ echo 1 > /proc/sys/net/ipv4/ip_forward
+ if [[ -n "$ip6" ]]; then
+@@ -348,7 +385,14 @@
+ # Enable without waiting for a reboot or service restart
+ echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
+ fi
++ if [[ "$os" == "slackware" ]]; then
++ echo "
++ *** Slackware Admins: Disregard systemctl, systemd, and firewall-cmd errors below. ***
++ "
++ fi
++
+ if systemctl is-active --quiet firewalld.service; then
++ # if systemctl is-active --quiet firewalld.service && [[ "$os" != "slackware" ]]; then
+ # Using both permanent and not permanent rules to avoid a firewalld
+ # reload.
+ # We don't use --add-service=openvpn because that would only work with
+@@ -401,6 +445,83 @@
+ WantedBy=multi-user.target" >> /etc/systemd/system/openvpn-iptables.service
+ systemctl enable --now openvpn-iptables.service
+ fi
++ if [[ "$os" == "slackware" ]]; then
++ out="#!/bin/sh
++# Start/stop/restart the OpenVPN Routing
++# 20231025 JWSmythe (https://jwsmythe.com) for https://github.com/Nyr/openvpn-install
++# Copyright (c) 2013 Nyr. Released under the MIT License.
++
++routing_start() {
++ $iptables_path -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ip
++ $iptables_path -I INPUT -p $protocol --dport $port -j ACCEPT
++ $iptables_path -I FORWARD -s 10.8.0.0/24 -j ACCEPT
++ $iptables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
++"
++ if [[ -n "$ip6" ]]; then
++ out+="
++ $ip6tables_path -t nat -A POSTROUTING -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to $ip6
++ $ip6tables_path -I FORWARD -s fddd:1194:1194:1194::/64 -j ACCEPT
++ $ip6tables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
++"
++ fi
++
++out+="}
++
++routing_stop() {
++ $iptables_path -t nat -D POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ip
++ $iptables_path -D INPUT -p $protocol --dport $port -j ACCEPT
++ $iptables_path -D FORWARD -s 10.8.0.0/24 -j ACCEPT
++ $iptables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
++ $iptables_path -F
++ $iptables_path -t nat -F
++"
++
++ if [[ -n "$ip6" ]]; then
++ out+="
++ $ip6tables_path -t nat -D POSTROUTING -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to $ip6
++ $ip6tables_path -D FORWARD -s fddd:1194:1194:1194::/64 -j ACCEPT
++ $ip6tables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
++ $ip6tables_path -F
++ $ip6tables_path -t nat -F
++ "
++ fi
++
++ out+="}
++
++routing_restart() {
++ routing_stop
++ sleep 1
++ routing_start
++}
++
++case \"\$1\" in
++'start')
++ routing_start
++ ;;
++'stop')
++ routing_stop
++ ;;
++'restart')
++ routing_restart
++ ;;
++*)
++ echo \"usage $0 start|stop|restart\"
++esac
++"
++ if [[ ! -f /etc/rc.d/rc.ovpn_routing ]]; then
++ echo "Writing startup routing to /etc/rc.d/rc.ovpn_routing"
++ echo "$out" > /etc/rc.d/rc.ovpn_routing
++ chmod 755 /etc/rc.d/rc.ovpn_routing
++ /etc/rc.d/rc.ovpn_routing
++ else
++ echo "!!! Writing startup routing to /etc/rc.d/rc.ovpn_routing.new !!!"
++ echo " You need to copy it over and run it."
++ echo "$out" > /etc/rc.d/rc.ovpn_routing.new
++ fi
++
++
++ fi
++
+ # If SELinux is enabled and a custom port was selected, we need this
+ if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 1194 ]]; then
+ # Install semanage if not already present
+@@ -431,7 +552,17 @@
+ ignore-unknown-option block-outside-dns
+ verb 3" > /etc/openvpn/server/client-common.txt
+ # Enable and start the OpenVPN service
++ if [[ "$os" == "slackware" ]]; then
++ echo "iii Starting up services. rc.openvpn and rc.ovpn_routing "
++ echo "!!! You need to add them to rc.local, so they will run at boot time !!!"
++ # Make sure they're executable
++ chmod 755 /etc/rc.d/rc.openvpn
++ chmod 755 /etc/rc.d/rc.ovpn_routing
++ /etc/rc.d/rc.openvpn start /etc/openvpn/server/server.conf
++ /etc/rc.d/rc.ovpn_routing start
++ else
+ systemctl enable --now openvpn-server@server.service
++ fi
+ # Generates the custom client.ovpn
+ new_client
+ echo
+@@ -439,6 +570,33 @@
+ echo
+ echo "The client configuration is available in:" ~/"$client.ovpn"
+ echo "New clients can be added by running this script again."
++
++ if [[ "$os" == "slackware" ]]; then
++ echo "
++ ************************************************************
++ !!!!! Slackware Admins !!!!!
++ ************************************************************
++ If this isn't the first time you've run this script, you may need to
++ overwrite rc.ovpn_routing with rc.ovpn_routing.new. It was left in case
++ you made customizations.
++
++ You need to add these lines to the end of your /etc/rc.d/rc.local,
++ so OpenVPN will start, and it will route the VPN clients correctly.
++
++ #==== Begin /etc/rc.d/rc.local lines =======================
++ # Start OpenVPN Server
++ if [ -x /etc/rc.d/rc.openvpn ]; then
++ . /etc/rc.d/rc.openvpn start /etc/openvpn/server/server.conf
++ fi
++
++ # Start OpenVPN Routing
++ if [ -x /etc/rc.d/rc.ovpn_routing ]; then
++ . /etc/rc.d/rc.ovpn_routing start
++ fi
++ #===== END /etc/rc.d/rc.local lines ========================
++ ************************************************************
++ "
++ fi
+ else
+ clear
+ echo "OpenVPN is already installed."
+@@ -522,6 +680,18 @@
+ if [[ "$remove" =~ ^[yY]$ ]]; then
+ port=$(grep '^port ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
+ protocol=$(grep '^proto ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
++ if [[ "$os" == "slackware" ]]; then
++ # Re-enabling so the stops will work. Disabling immediately after.
++ chmod 755 /etc/rc.d/rc.openvpn
++ chmod 755 /etc/rc.d/rc.ovpn_routing
++ /etc/rc.d/rc.ovpn_routing stop
++ /etc/rc.d/rc.openvpn stop
++ rm -rf /etc/openvpn/server
++ chmod 644 /etc/rc.d/rc.openvpn
++ chmod 644 /etc/rc.d/rc.ovpn_routing
++ # We're not uninstalling anything. The user can if they want.
++ # slackpkg remove openvpn
++ else
+ if systemctl is-active --quiet firewalld.service; then
+ ip=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.8.0.0/24 '"'"'!'"'"' -d 10.8.0.0/24' | grep -oE '[^ ]+$')
+ # Using both permanent and not permanent rules to avoid a firewalld reload.
+@@ -548,7 +718,7 @@
+ systemctl disable --now openvpn-server@server.service
+ rm -f /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
+ rm -f /etc/sysctl.d/99-openvpn-forward.conf
+- if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
++ if [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
+ rm -rf /etc/openvpn/server
+ apt-get remove --purge -y openvpn
+ else
+@@ -556,6 +726,7 @@
+ yum remove -y openvpn
+ rm -rf /etc/openvpn/server
+ fi
++ fi
+ echo
+ echo "OpenVPN removed!"
+ else
diff --git a/openvpn-install.sh.orig b/openvpn-install.sh.orig
new file mode 100644
index 0000000..7800028
--- /dev/null
+++ b/openvpn-install.sh.orig
@@ -0,0 +1,571 @@
+#!/bin/bash
+#
+# https://github.com/Nyr/openvpn-install
+#
+# Copyright (c) 2013 Nyr. Released under the MIT License.
+
+
+# Detect Debian users running the script with "sh" instead of bash
+if readlink /proc/$$/exe | grep -q "dash"; then
+ echo 'This installer needs to be run with "bash", not "sh".'
+ exit
+fi
+
+# Discard stdin. Needed when running from an one-liner which includes a newline
+read -N 999999 -t 0.001
+
+# Detect OpenVZ 6
+if [[ $(uname -r | cut -d "." -f 1) -eq 2 ]]; then
+ echo "The system is running an old kernel, which is incompatible with this installer."
+ exit
+fi
+
+# Detect OS
+# $os_version variables aren't always in use, but are kept here for convenience
+if grep -qs "ubuntu" /etc/os-release; then
+ os="ubuntu"
+ os_version=$(grep 'VERSION_ID' /etc/os-release | cut -d '"' -f 2 | tr -d '.')
+ group_name="nogroup"
+elif [[ -e /etc/debian_version ]]; then
+ os="debian"
+ os_version=$(grep -oE '[0-9]+' /etc/debian_version | head -1)
+ group_name="nogroup"
+elif [[ -e /etc/almalinux-release || -e /etc/rocky-release || -e /etc/centos-release ]]; then
+ os="centos"
+ os_version=$(grep -shoE '[0-9]+' /etc/almalinux-release /etc/rocky-release /etc/centos-release | head -1)
+ group_name="nobody"
+elif [[ -e /etc/fedora-release ]]; then
+ os="fedora"
+ os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1)
+ group_name="nobody"
+else
+ echo "This installer seems to be running on an unsupported distribution.
+Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora."
+ exit
+fi
+
+if [[ "$os" == "ubuntu" && "$os_version" -lt 1804 ]]; then
+ echo "Ubuntu 18.04 or higher is required to use this installer.
+This version of Ubuntu is too old and unsupported."
+ exit
+fi
+
+if [[ "$os" == "debian" ]]; then
+ if grep -q '/sid' /etc/debian_version; then
+ echo "Debian Testing and Debian Unstable are unsupported by this installer."
+ exit
+ fi
+ if [[ "$os_version" -lt 9 ]]; then
+ echo "Debian 9 or higher is required to use this installer.
+This version of Debian is too old and unsupported."
+ exit
+ fi
+fi
+
+if [[ "$os" == "centos" && "$os_version" -lt 7 ]]; then
+ echo "CentOS 7 or higher is required to use this installer.
+This version of CentOS is too old and unsupported."
+ exit
+fi
+
+# Detect environments where $PATH does not include the sbin directories
+if ! grep -q sbin <<< "$PATH"; then
+ echo '$PATH does not include sbin. Try using "su -" instead of "su".'
+ exit
+fi
+
+if [[ "$EUID" -ne 0 ]]; then
+ echo "This installer needs to be run with superuser privileges."
+ exit
+fi
+
+if [[ ! -e /dev/net/tun ]] || ! ( exec 7<>/dev/net/tun ) 2>/dev/null; then
+ echo "The system does not have the TUN device available.
+TUN needs to be enabled before running this installer."
+ exit
+fi
+
+new_client () {
+ # Generates the custom client.ovpn
+ {
+ cat /etc/openvpn/server/client-common.txt
+ echo ""
+ cat /etc/openvpn/server/easy-rsa/pki/ca.crt
+ echo ""
+ echo ""
+ sed -ne '/BEGIN CERTIFICATE/,$ p' /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt
+ echo ""
+ echo ""
+ cat /etc/openvpn/server/easy-rsa/pki/private/"$client".key
+ echo ""
+ echo ""
+ sed -ne '/BEGIN OpenVPN Static key/,$ p' /etc/openvpn/server/tc.key
+ echo ""
+ } > ~/"$client".ovpn
+}
+
+if [[ ! -e /etc/openvpn/server/server.conf ]]; then
+ # Detect some Debian minimal setups where neither wget nor curl are installed
+ if ! hash wget 2>/dev/null && ! hash curl 2>/dev/null; then
+ echo "Wget is required to use this installer."
+ read -n1 -r -p "Press any key to install Wget and continue..."
+ apt-get update
+ apt-get install -y wget
+ fi
+ clear
+ echo 'Welcome to this OpenVPN road warrior installer!'
+ # If system has a single IPv4, it is selected automatically. Else, ask the user
+ if [[ $(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}') -eq 1 ]]; then
+ ip=$(ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}')
+ else
+ number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}')
+ echo
+ echo "Which IPv4 address should be used?"
+ ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | nl -s ') '
+ read -p "IPv4 address [1]: " ip_number
+ until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$number_of_ip" ]]; do
+ echo "$ip_number: invalid selection."
+ read -p "IPv4 address [1]: " ip_number
+ done
+ [[ -z "$ip_number" ]] && ip_number="1"
+ ip=$(ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | sed -n "$ip_number"p)
+ fi
+ # If $ip is a private IP address, the server must be behind NAT
+ if echo "$ip" | grep -qE '^(10\.|172\.1[6789]\.|172\.2[0-9]\.|172\.3[01]\.|192\.168)'; then
+ echo
+ echo "This server is behind NAT. What is the public IPv4 address or hostname?"
+ # Get public IP and sanitize with grep
+ get_public_ip=$(grep -m 1 -oE '^[0-9]{1,3}(\.[0-9]{1,3}){3}$' <<< "$(wget -T 10 -t 1 -4qO- "http://ip1.dynupdate.no-ip.com/" || curl -m 10 -4Ls "http://ip1.dynupdate.no-ip.com/")")
+ read -p "Public IPv4 address / hostname [$get_public_ip]: " public_ip
+ # If the checkip service is unavailable and user didn't provide input, ask again
+ until [[ -n "$get_public_ip" || -n "$public_ip" ]]; do
+ echo "Invalid input."
+ read -p "Public IPv4 address / hostname: " public_ip
+ done
+ [[ -z "$public_ip" ]] && public_ip="$get_public_ip"
+ fi
+ # If system has a single IPv6, it is selected automatically
+ if [[ $(ip -6 addr | grep -c 'inet6 [23]') -eq 1 ]]; then
+ ip6=$(ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}')
+ fi
+ # If system has multiple IPv6, ask the user to select one
+ if [[ $(ip -6 addr | grep -c 'inet6 [23]') -gt 1 ]]; then
+ number_of_ip6=$(ip -6 addr | grep -c 'inet6 [23]')
+ echo
+ echo "Which IPv6 address should be used?"
+ ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}' | nl -s ') '
+ read -p "IPv6 address [1]: " ip6_number
+ until [[ -z "$ip6_number" || "$ip6_number" =~ ^[0-9]+$ && "$ip6_number" -le "$number_of_ip6" ]]; do
+ echo "$ip6_number: invalid selection."
+ read -p "IPv6 address [1]: " ip6_number
+ done
+ [[ -z "$ip6_number" ]] && ip6_number="1"
+ ip6=$(ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}' | sed -n "$ip6_number"p)
+ fi
+ echo
+ echo "Which protocol should OpenVPN use?"
+ echo " 1) UDP (recommended)"
+ echo " 2) TCP"
+ read -p "Protocol [1]: " protocol
+ until [[ -z "$protocol" || "$protocol" =~ ^[12]$ ]]; do
+ echo "$protocol: invalid selection."
+ read -p "Protocol [1]: " protocol
+ done
+ case "$protocol" in
+ 1|"")
+ protocol=udp
+ ;;
+ 2)
+ protocol=tcp
+ ;;
+ esac
+ echo
+ echo "What port should OpenVPN listen to?"
+ read -p "Port [1194]: " port
+ until [[ -z "$port" || "$port" =~ ^[0-9]+$ && "$port" -le 65535 ]]; do
+ echo "$port: invalid port."
+ read -p "Port [1194]: " port
+ done
+ [[ -z "$port" ]] && port="1194"
+ echo
+ echo "Select a DNS server for the clients:"
+ echo " 1) Current system resolvers"
+ echo " 2) Google"
+ echo " 3) 1.1.1.1"
+ echo " 4) OpenDNS"
+ echo " 5) Quad9"
+ echo " 6) AdGuard"
+ read -p "DNS server [1]: " dns
+ until [[ -z "$dns" || "$dns" =~ ^[1-6]$ ]]; do
+ echo "$dns: invalid selection."
+ read -p "DNS server [1]: " dns
+ done
+ echo
+ echo "Enter a name for the first client:"
+ read -p "Name [client]: " unsanitized_client
+ # Allow a limited set of characters to avoid conflicts
+ client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
+ [[ -z "$client" ]] && client="client"
+ echo
+ echo "OpenVPN installation is ready to begin."
+ # Install a firewall if firewalld or iptables are not already available
+ if ! systemctl is-active --quiet firewalld.service && ! hash iptables 2>/dev/null; then
+ if [[ "$os" == "centos" || "$os" == "fedora" ]]; then
+ firewall="firewalld"
+ # We don't want to silently enable firewalld, so we give a subtle warning
+ # If the user continues, firewalld will be installed and enabled during setup
+ echo "firewalld, which is required to manage routing tables, will also be installed."
+ elif [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then
+ # iptables is way less invasive than firewalld so no warning is given
+ firewall="iptables"
+ fi
+ fi
+ read -n1 -r -p "Press any key to continue..."
+ # If running inside a container, disable LimitNPROC to prevent conflicts
+ if systemd-detect-virt -cq; then
+ mkdir /etc/systemd/system/openvpn-server@server.service.d/ 2>/dev/null
+ echo "[Service]
+LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
+ fi
+ if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
+ apt-get update
+ apt-get install -y --no-install-recommends openvpn openssl ca-certificates $firewall
+ elif [[ "$os" = "centos" ]]; then
+ yum install -y epel-release
+ yum install -y openvpn openssl ca-certificates tar $firewall
+ else
+ # Else, OS must be Fedora
+ dnf install -y openvpn openssl ca-certificates tar $firewall
+ fi
+ # If firewalld was just installed, enable it
+ if [[ "$firewall" == "firewalld" ]]; then
+ systemctl enable --now firewalld.service
+ fi
+ # Get easy-rsa
+ easy_rsa_url='https://github.com/OpenVPN/easy-rsa/releases/download/v3.1.7/EasyRSA-3.1.7.tgz'
+ mkdir -p /etc/openvpn/server/easy-rsa/
+ { wget -qO- "$easy_rsa_url" 2>/dev/null || curl -sL "$easy_rsa_url" ; } | tar xz -C /etc/openvpn/server/easy-rsa/ --strip-components 1
+ chown -R root:root /etc/openvpn/server/easy-rsa/
+ cd /etc/openvpn/server/easy-rsa/
+ # Create the PKI, set up the CA and the server and client certificates
+ ./easyrsa --batch init-pki
+ ./easyrsa --batch build-ca nopass
+ ./easyrsa --batch --days=3650 build-server-full server nopass
+ ./easyrsa --batch --days=3650 build-client-full "$client" nopass
+ ./easyrsa --batch --days=3650 gen-crl
+ # Move the stuff we need
+ cp pki/ca.crt pki/private/ca.key pki/issued/server.crt pki/private/server.key pki/crl.pem /etc/openvpn/server
+ # CRL is read with each client connection, while OpenVPN is dropped to nobody
+ chown nobody:"$group_name" /etc/openvpn/server/crl.pem
+ # Without +x in the directory, OpenVPN can't run a stat() on the CRL file
+ chmod o+x /etc/openvpn/server/
+ # Generate key for tls-crypt
+ openvpn --genkey --secret /etc/openvpn/server/tc.key
+ # Create the DH parameters file using the predefined ffdhe2048 group
+ echo '-----BEGIN DH PARAMETERS-----
+MIIBCAKCAQEA//////////+t+FRYortKmq/cViAnPTzx2LnFg84tNpWp4TZBFGQz
++8yTnc4kmz75fS/jY2MMddj2gbICrsRhetPfHtXV/WVhJDP1H18GbtCFY2VVPe0a
+87VXE15/V8k1mE8McODmi3fipona8+/och3xWKE2rec1MKzKT0g6eXq8CrGCsyT7
+YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjcrsZCwenyO4KbXCeAvzhzffi
+7MA0BM0oNC9hkXL+nOmFg/+OTxIy7vKBg8P+OxtMb61zO7X8vC7CIAXFjvGDfRaD
+ssbzSibBsu/6iGtCOGEoXJf//////////wIBAg==
+-----END DH PARAMETERS-----' > /etc/openvpn/server/dh.pem
+ # Generate server.conf
+ echo "local $ip
+port $port
+proto $protocol
+dev tun
+ca ca.crt
+cert server.crt
+key server.key
+dh dh.pem
+auth SHA512
+tls-crypt tc.key
+topology subnet
+server 10.8.0.0 255.255.255.0" > /etc/openvpn/server/server.conf
+ # IPv6
+ if [[ -z "$ip6" ]]; then
+ echo 'push "redirect-gateway def1 bypass-dhcp"' >> /etc/openvpn/server/server.conf
+ else
+ echo 'server-ipv6 fddd:1194:1194:1194::/64' >> /etc/openvpn/server/server.conf
+ echo 'push "redirect-gateway def1 ipv6 bypass-dhcp"' >> /etc/openvpn/server/server.conf
+ fi
+ echo 'ifconfig-pool-persist ipp.txt' >> /etc/openvpn/server/server.conf
+ # DNS
+ case "$dns" in
+ 1|"")
+ # Locate the proper resolv.conf
+ # Needed for systems running systemd-resolved
+ if grep '^nameserver' "/etc/resolv.conf" | grep -qv '127.0.0.53' ; then
+ resolv_conf="/etc/resolv.conf"
+ else
+ resolv_conf="/run/systemd/resolve/resolv.conf"
+ fi
+ # Obtain the resolvers from resolv.conf and use them for OpenVPN
+ grep -v '^#\|^;' "$resolv_conf" | grep '^nameserver' | grep -v '127.0.0.53' | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | while read line; do
+ echo "push \"dhcp-option DNS $line\"" >> /etc/openvpn/server/server.conf
+ done
+ ;;
+ 2)
+ echo 'push "dhcp-option DNS 8.8.8.8"' >> /etc/openvpn/server/server.conf
+ echo 'push "dhcp-option DNS 8.8.4.4"' >> /etc/openvpn/server/server.conf
+ ;;
+ 3)
+ echo 'push "dhcp-option DNS 1.1.1.1"' >> /etc/openvpn/server/server.conf
+ echo 'push "dhcp-option DNS 1.0.0.1"' >> /etc/openvpn/server/server.conf
+ ;;
+ 4)
+ echo 'push "dhcp-option DNS 208.67.222.222"' >> /etc/openvpn/server/server.conf
+ echo 'push "dhcp-option DNS 208.67.220.220"' >> /etc/openvpn/server/server.conf
+ ;;
+ 5)
+ echo 'push "dhcp-option DNS 9.9.9.9"' >> /etc/openvpn/server/server.conf
+ echo 'push "dhcp-option DNS 149.112.112.112"' >> /etc/openvpn/server/server.conf
+ ;;
+ 6)
+ echo 'push "dhcp-option DNS 94.140.14.14"' >> /etc/openvpn/server/server.conf
+ echo 'push "dhcp-option DNS 94.140.15.15"' >> /etc/openvpn/server/server.conf
+ ;;
+ esac
+ echo 'push "block-outside-dns"' >> /etc/openvpn/server/server.conf
+ echo "keepalive 10 120
+user nobody
+group $group_name
+persist-key
+persist-tun
+verb 3
+crl-verify crl.pem" >> /etc/openvpn/server/server.conf
+ if [[ "$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/99-openvpn-forward.conf
+ # Enable without waiting for a reboot or service restart
+ echo 1 > /proc/sys/net/ipv4/ip_forward
+ if [[ -n "$ip6" ]]; then
+ # Enable net.ipv6.conf.all.forwarding for the system
+ echo "net.ipv6.conf.all.forwarding=1" >> /etc/sysctl.d/99-openvpn-forward.conf
+ # Enable without waiting for a reboot or service restart
+ echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
+ fi
+ if systemctl is-active --quiet firewalld.service; then
+ # Using both permanent and not permanent rules to avoid a firewalld
+ # reload.
+ # We don't use --add-service=openvpn because that would only work with
+ # the default port and protocol.
+ firewall-cmd --add-port="$port"/"$protocol"
+ firewall-cmd --zone=trusted --add-source=10.8.0.0/24
+ firewall-cmd --permanent --add-port="$port"/"$protocol"
+ firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24
+ # Set NAT for the VPN subnet
+ firewall-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$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 "$ip"
+ if [[ -n "$ip6" ]]; then
+ firewall-cmd --zone=trusted --add-source=fddd:1194:1194:1194::/64
+ firewall-cmd --permanent --zone=trusted --add-source=fddd:1194:1194:1194::/64
+ firewall-cmd --direct --add-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
+ firewall-cmd --permanent --direct --add-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
+ fi
+ else
+ # Create a service to set up persistent iptables rules
+ iptables_path=$(command -v iptables)
+ ip6tables_path=$(command -v ip6tables)
+ # nf_tables is not available as standard in OVZ kernels. So use iptables-legacy
+ # if we are in OVZ, with a nf_tables backend and iptables-legacy is available.
+ if [[ $(systemd-detect-virt) == "openvz" ]] && readlink -f "$(command -v iptables)" | grep -q "nft" && hash iptables-legacy 2>/dev/null; then
+ iptables_path=$(command -v iptables-legacy)
+ ip6tables_path=$(command -v ip6tables-legacy)
+ fi
+ echo "[Unit]
+Before=network.target
+[Service]
+Type=oneshot
+ExecStart=$iptables_path -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ip
+ExecStart=$iptables_path -I INPUT -p $protocol --dport $port -j ACCEPT
+ExecStart=$iptables_path -I FORWARD -s 10.8.0.0/24 -j ACCEPT
+ExecStart=$iptables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
+ExecStop=$iptables_path -t nat -D POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $ip
+ExecStop=$iptables_path -D INPUT -p $protocol --dport $port -j ACCEPT
+ExecStop=$iptables_path -D FORWARD -s 10.8.0.0/24 -j ACCEPT
+ExecStop=$iptables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" > /etc/systemd/system/openvpn-iptables.service
+ if [[ -n "$ip6" ]]; then
+ echo "ExecStart=$ip6tables_path -t nat -A POSTROUTING -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to $ip6
+ExecStart=$ip6tables_path -I FORWARD -s fddd:1194:1194:1194::/64 -j ACCEPT
+ExecStart=$ip6tables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
+ExecStop=$ip6tables_path -t nat -D POSTROUTING -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to $ip6
+ExecStop=$ip6tables_path -D FORWARD -s fddd:1194:1194:1194::/64 -j ACCEPT
+ExecStop=$ip6tables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" >> /etc/systemd/system/openvpn-iptables.service
+ fi
+ echo "RemainAfterExit=yes
+[Install]
+WantedBy=multi-user.target" >> /etc/systemd/system/openvpn-iptables.service
+ systemctl enable --now openvpn-iptables.service
+ fi
+ # If SELinux is enabled and a custom port was selected, we need this
+ if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 1194 ]]; then
+ # Install semanage if not already present
+ if ! hash semanage 2>/dev/null; then
+ if [[ "$os_version" -eq 7 ]]; then
+ # Centos 7
+ yum install -y policycoreutils-python
+ else
+ # CentOS 8 or Fedora
+ dnf install -y policycoreutils-python-utils
+ fi
+ fi
+ semanage port -a -t openvpn_port_t -p "$protocol" "$port"
+ fi
+ # If the server is behind NAT, use the correct IP address
+ [[ -n "$public_ip" ]] && ip="$public_ip"
+ # client-common.txt is created so we have a template to add further users later
+ echo "client
+dev tun
+proto $protocol
+remote $ip $port
+resolv-retry infinite
+nobind
+persist-key
+persist-tun
+remote-cert-tls server
+auth SHA512
+ignore-unknown-option block-outside-dns
+verb 3" > /etc/openvpn/server/client-common.txt
+ # Enable and start the OpenVPN service
+ systemctl enable --now openvpn-server@server.service
+ # Generates the custom client.ovpn
+ new_client
+ echo
+ echo "Finished!"
+ echo
+ echo "The client configuration is available in:" ~/"$client.ovpn"
+ echo "New clients can be added by running this script again."
+else
+ clear
+ echo "OpenVPN is already installed."
+ echo
+ echo "Select an option:"
+ echo " 1) Add a new client"
+ echo " 2) Revoke an existing client"
+ echo " 3) Remove OpenVPN"
+ echo " 4) Exit"
+ read -p "Option: " option
+ until [[ "$option" =~ ^[1-4]$ ]]; do
+ echo "$option: invalid selection."
+ read -p "Option: " option
+ done
+ case "$option" in
+ 1)
+ echo
+ echo "Provide a name for the client:"
+ read -p "Name: " unsanitized_client
+ client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
+ while [[ -z "$client" || -e /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt ]]; do
+ echo "$client: invalid name."
+ read -p "Name: " unsanitized_client
+ client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
+ done
+ cd /etc/openvpn/server/easy-rsa/
+ ./easyrsa --batch --days=3650 build-client-full "$client" nopass
+ # Generates the custom client.ovpn
+ new_client
+ echo
+ echo "$client added. Configuration available in:" ~/"$client.ovpn"
+ exit
+ ;;
+ 2)
+ # This option could be documented a bit better and maybe even be simplified
+ # ...but what can I say, I want some sleep too
+ number_of_clients=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep -c "^V")
+ if [[ "$number_of_clients" = 0 ]]; then
+ echo
+ echo "There are no existing clients!"
+ exit
+ fi
+ echo
+ echo "Select the client to revoke:"
+ tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') '
+ read -p "Client: " client_number
+ until [[ "$client_number" =~ ^[0-9]+$ && "$client_number" -le "$number_of_clients" ]]; do
+ echo "$client_number: invalid selection."
+ read -p "Client: " client_number
+ done
+ client=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$client_number"p)
+ echo
+ read -p "Confirm $client revocation? [y/N]: " revoke
+ until [[ "$revoke" =~ ^[yYnN]*$ ]]; do
+ echo "$revoke: invalid selection."
+ read -p "Confirm $client revocation? [y/N]: " revoke
+ done
+ if [[ "$revoke" =~ ^[yY]$ ]]; then
+ cd /etc/openvpn/server/easy-rsa/
+ ./easyrsa --batch revoke "$client"
+ ./easyrsa --batch --days=3650 gen-crl
+ rm -f /etc/openvpn/server/crl.pem
+ cp /etc/openvpn/server/easy-rsa/pki/crl.pem /etc/openvpn/server/crl.pem
+ # CRL is read with each client connection, when OpenVPN is dropped to nobody
+ chown nobody:"$group_name" /etc/openvpn/server/crl.pem
+ echo
+ echo "$client revoked!"
+ else
+ echo
+ echo "$client revocation aborted!"
+ fi
+ exit
+ ;;
+ 3)
+ echo
+ read -p "Confirm OpenVPN removal? [y/N]: " remove
+ until [[ "$remove" =~ ^[yYnN]*$ ]]; do
+ echo "$remove: invalid selection."
+ read -p "Confirm OpenVPN removal? [y/N]: " remove
+ done
+ if [[ "$remove" =~ ^[yY]$ ]]; then
+ port=$(grep '^port ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
+ protocol=$(grep '^proto ' /etc/openvpn/server/server.conf | cut -d " " -f 2)
+ if systemctl is-active --quiet firewalld.service; then
+ ip=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.8.0.0/24 '"'"'!'"'"' -d 10.8.0.0/24' | grep -oE '[^ ]+$')
+ # Using both permanent and not permanent rules to avoid a firewalld reload.
+ firewall-cmd --remove-port="$port"/"$protocol"
+ firewall-cmd --zone=trusted --remove-source=10.8.0.0/24
+ firewall-cmd --permanent --remove-port="$port"/"$protocol"
+ firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24
+ firewall-cmd --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip"
+ firewall-cmd --permanent --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip"
+ if grep -qs "server-ipv6" /etc/openvpn/server/server.conf; then
+ ip6=$(firewall-cmd --direct --get-rules ipv6 nat POSTROUTING | grep '\-s fddd:1194:1194:1194::/64 '"'"'!'"'"' -d fddd:1194:1194:1194::/64' | grep -oE '[^ ]+$')
+ firewall-cmd --zone=trusted --remove-source=fddd:1194:1194:1194::/64
+ firewall-cmd --permanent --zone=trusted --remove-source=fddd:1194:1194:1194::/64
+ firewall-cmd --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
+ firewall-cmd --permanent --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:1194:1194:1194::/64 ! -d fddd:1194:1194:1194::/64 -j SNAT --to "$ip6"
+ fi
+ else
+ systemctl disable --now openvpn-iptables.service
+ rm -f /etc/systemd/system/openvpn-iptables.service
+ fi
+ if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 1194 ]]; then
+ semanage port -d -t openvpn_port_t -p "$protocol" "$port"
+ fi
+ systemctl disable --now openvpn-server@server.service
+ rm -f /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
+ rm -f /etc/sysctl.d/99-openvpn-forward.conf
+ if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
+ rm -rf /etc/openvpn/server
+ apt-get remove --purge -y openvpn
+ else
+ # Else, OS must be CentOS or Fedora
+ yum remove -y openvpn
+ rm -rf /etc/openvpn/server
+ fi
+ echo
+ echo "OpenVPN removed!"
+ else
+ echo
+ echo "OpenVPN removal aborted!"
+ fi
+ exit
+ ;;
+ 4)
+ exit
+ ;;
+ esac
+fi
\ No newline at end of file