From 43f6f521e4e970fdd7534e243252ac255b487cc9 Mon Sep 17 00:00:00 2001
From: l198881 <82917144+l198881@users.noreply.github.com>
Date: Sun, 23 May 2021 22:04:57 -0300
Subject: [PATCH] Create Openvpn_install_updated.sh
---
Openvpn_install_updated.sh | 543 +++++++++++++++++++++++++++++++++++++
1 file changed, 543 insertions(+)
create mode 100644 Openvpn_install_updated.sh
diff --git a/Openvpn_install_updated.sh b/Openvpn_install_updated.sh
new file mode 100644
index 0000000..9d46552
--- /dev/null
+++ b/Openvpn_install_updated.sh
@@ -0,0 +1,543 @@
+#!/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 script needs to be run with bash, not sh"
+ exit
+fi
+
+if [[ "$EUID" -ne 0 ]]; then
+ echo "Sorry, you need to run this as root"
+ 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=$(grep -oE '[0-9]+' /etc/debian_version | head -1)
+ group_name="nogroup"
+elif [[ -e /etc/centos-release ]]; then
+ os="centos"
+ os_version=$(grep -oE '[0-9]+' /etc/centos-release | head -1)
+ group_name="nobody"
+elif [[ -e /etc/fedora-release ]]; then
+ os="fedora"
+ os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1)
+ group_name="nobody"
+else
+ echo "Looks like you aren't running this installer on Ubuntu, Debian, CentOS or Fedora"
+ exit
+fi
+
+if [[ "$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" && "$os_version" -lt 9 ]]; then
+ echo "Debian 9 or higher is required to use this installer
+This version of Debian is too old and unsupported"
+ exit
+fi
+
+if [[ "$os" == "centos" && "$os_version" -lt 7 ]]; then
+ echo "CentOS 7 or higher is required to use this installer
+This version of CentOS is too old and unsupported"
+ exit
+fi
+
+if [[ ! -e /dev/net/tun ]]; then
+ echo "The TUN device is not available
+You need to enable TUN before running this script"
+ exit
+fi
+
+new_client () {
+ # Generates the custom client.ovpn
+ {
+ cat /etc/openvpn/server/client-common.txt
+ echo ""
+ cat /etc/openvpn/server/easy-rsa/pki/ca.crt
+ echo ""
+ echo ""
+ sed -ne '/BEGIN CERTIFICATE/,$ 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
+ clear
+ echo 'Welcome to this OpenVPN road warrior installer!'
+ echo
+ echo "I need to ask you a few questions before starting setup."
+ echo "You can use the default options and just press enter if you are ok with them."
+ # If system has a single IPv4, it is selected automatically. Else, ask the user
+ if [[ $(ip -4 addr | grep inet | grep -vEc '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}') -eq 1 ]]; then
+ ip=$(ip -4 addr | grep inet | 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}')
+ else
+ number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')
+ echo
+ echo "What IPv4 address should the OpenVPN server use?"
+ ip -4 addr | grep inet | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | nl -s ') '
+ read -p "IPv4 address [1]: " ip_number
+ until [[ -z "$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=$(ip -4 addr | grep inet | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | sed -n "$ip_number"p)
+ 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=$(grep -m 1 -oE '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$' <<< "$(wget -T 10 -t 1 -4qO- "http://ip1.dynupdate.no-ip.com/" || curl -m 10 -4Ls "http://ip1.dynupdate.no-ip.com/")")
+ read -p "Public IPv4 address / hostname [$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 "What IPv6 address should the OpenVPN server use?"
+ 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 do you want for OpenVPN connections?"
+ 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 do you want OpenVPN listening 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 "$port" ]] && port="1194"
+ echo
+ echo "Which DNS do you want to use with the VPN?"
+ echo " 1) Current system resolvers"
+ echo " 2) 1.1.1.1"
+ echo " 3) Google"
+ echo " 4) OpenDNS"
+ echo " 5) NTT"
+ echo " 6) AdGuard"
+ read -p "DNS [1]: " dns
+ until [[ -z "$dns" || "$dns" =~ ^[1-6]$ ]]; do
+ echo "$dns: invalid selection."
+ read -p "DNS [1]: " dns
+ done
+ echo
+ echo "Finally, tell me a name for the client certificate."
+ read -p "Client name [client]: " unsanitized_client
+ # Allow a limited set of characters to avoid conflicts
+ client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
+ [[ -z "$client" ]] && client="client"
+ echo
+ echo "We are ready to set up your OpenVPN server now."
+ # Install a firewall in the rare case where one is 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
+ 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
+ echo
+ 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 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/v3.0.7/EasyRSA-3.0.7.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-3.0.7/ /etc/openvpn/server/
+ mv /etc/openvpn/server/EasyRSA-3.0.7/ /etc/openvpn/server/easy-rsa/
+ chown -R root:root /etc/openvpn/server/easy-rsa/
+ rm -f ~/easyrsa.tgz
+ cd /etc/openvpn/server/easy-rsa/
+ # Create the PKI, set up the CA and the server and client certificates
+ ./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 "$client" nopass
+ EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
+ # Move the stuff we need
+ cp pki/ca.crt pki/private/ca.key pki/issued/server.crt pki/private/server.key pki/crl.pem /etc/openvpn/server
+ # CRL is read with each client connection, when OpenVPN is dropped to nobody
+ chown nobody:"$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
++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 "$dns" in
+ 1|"")
+ # Locate the proper resolv.conf
+ # Needed for systems running systemd-resolved
+ if grep -q "127.0.0.53" "/etc/resolv.conf"; then
+ resolv_conf="/run/systemd/resolve/resolv.conf"
+ else
+ resolv_conf="/etc/resolv.conf"
+ fi
+ # Obtain the resolvers from resolv.conf and use them for OpenVPN
+ grep -v '#' "$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
+ ;;
+ 2)
+ 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
+ ;;
+ 3)
+ 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
+ ;;
+ 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 129.250.35.250"' >> /etc/openvpn/server/server.conf
+ echo 'push "dhcp-option DNS 129.250.35.251"' >> /etc/openvpn/server/server.conf
+ ;;
+ 6)
+ echo 'push "dhcp-option DNS 176.103.130.130"' >> /etc/openvpn/server/server.conf
+ echo 'push "dhcp-option DNS 176.103.130.131"' >> /etc/openvpn/server/server.conf
+ ;;
+ esac
+ echo "keepalive 10 120
+cipher AES-256-CBC
+user nobody
+group $group_name
+persist-key
+persist-tun
+crl-verify crl.pem" >> /etc/openvpn/server/server.conf
+ if [[ "$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
+ echo 1 > /proc/sys/net/ipv4/ip_forward
+ if [[ -n "$ip6" ]]; then
+ # Enable net.ipv6.conf.all.forwarding for the system
+ echo "net.ipv6.conf.all.forwarding=1" >> /etc/sysctl.d/30-openvpn-forward.conf
+ # Enable without waiting for a reboot or service restart
+ echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
+ fi
+ if systemctl is-active --quiet firewalld.service; then
+ # Using both permanent and not permanent rules to avoid a firewalld
+ # reload.
+ # We don't use --add-service=openvpn because that would only work with
+ # the default port and protocol.
+ firewall-cmd --add-port="$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)
+ 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=/sbin/ip6tables -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" "$port"
+ fi
+ # If the server is behind NAT, use the correct IP address
+ [[ ! -z "$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 $port
+resolv-retry infinite
+nobind
+persist-key
+persist-tun
+remote-cert-tls server
+auth SHA512
+cipher AES-256-CBC
+ignore-unknown-option block-outside-dns
+block-outside-dns
+verb 3" > /etc/openvpn/server/client-common.txt
+ # Enable and start the OpenVPN service
+ systemctl enable --now openvpn-server@server.service
+ # Generates the custom client.ovpn
+ new_client
+ echo
+ echo "Finished!"
+ echo
+ echo "Your client configuration is available at:" ~/"$client.ovpn"
+ echo "If you want to add more clients, just run this script again!"
+else
+ clear
+ echo "Looks like OpenVPN is already installed."
+ echo
+ echo "What do you want to do?"
+ echo " 1) Add a new user"
+ echo " 2) Revoke an existing user"
+ echo " 3) Remove OpenVPN"
+ echo " 4) Exit"
+ read -p "Select an option: " option
+ until [[ "$option" =~ ^[1-4]$ ]]; do
+ echo "$option: invalid selection."
+ read -p "Select an option: " option
+ done
+ case "$option" in
+ 1)
+ echo
+ echo "Tell me a name for the client certificate."
+ read -p "Client 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 "$client: invalid client name."
+ read -p "Client name: " unsanitized_client
+ client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client")
+ done
+ cd /etc/openvpn/server/easy-rsa/
+ EASYRSA_CERT_EXPIRE=3650 ./easyrsa build-client-full "$client" nopass
+ # Generates the custom client.ovpn
+ new_client
+ echo
+ echo "Client $client added, configuration is available at:" ~/"$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 "You have no existing clients!"
+ exit
+ fi
+ echo
+ echo "Select the existing client certificate you want to revoke:"
+ tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') '
+ read -p "Select one client: " client_number
+ until [[ "$client_number" =~ ^[0-9]+$ && "$client_number" -le "$number_of_clients" ]]; do
+ echo "$client_number: invalid selection."
+ read -p "Select one client: " client_number
+ done
+ client=$(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 "Do you really want to revoke access for client $client? [y/N]: " revoke
+ until [[ "$revoke" =~ ^[yYnN]*$ ]]; do
+ echo "$revoke: invalid selection."
+ read -p "Do you really want to revoke access for client $client? [y/N]: " revoke
+ done
+ if [[ "$revoke" =~ ^[yY]$ ]]; then
+ cd /etc/openvpn/server/easy-rsa/
+ ./easyrsa --batch revoke "$client"
+ EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
+ rm -f /etc/openvpn/server/crl.pem
+ cp /etc/openvpn/server/easy-rsa/pki/crl.pem /etc/openvpn/server/crl.pem
+ # CRL is read with each client connection, when OpenVPN is dropped to nobody
+ chown nobody:"$group_name" /etc/openvpn/server/crl.pem
+ echo
+ echo "Certificate for client $client revoked!"
+ else
+ echo
+ echo "Certificate revocation for client $client aborted!"
+ fi
+ exit
+ ;;
+ 3)
+ echo
+ read -p "Do you really want to remove OpenVPN? [y/N]: " remove
+ until [[ "$remove" =~ ^[yYnN]*$ ]]; do
+ echo "$remove: invalid selection."
+ read -p "Do you really want to remove OpenVPN? [y/N]: " remove
+ done
+ if [[ "$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" "$port"
+ fi
+ systemctl disable --now openvpn-server@server.service
+ rm -rf /etc/openvpn/server
+ rm -f /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
+ rm -f /etc/sysctl.d/30-openvpn-forward.conf
+ if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
+ apt-get remove --purge -y openvpn
+ else
+ # Else, OS must be CentOS or Fedora
+ yum remove -y openvpn
+ fi
+ echo
+ echo "OpenVPN removed!"
+ else
+ echo
+ echo "Removal aborted!"
+ fi
+ exit
+ ;;
+ 4)
+ exit
+ ;;
+ esac
+fi
+