Mercurial > HIS > vpn-net-set
diff openvpn-install-Nyr.sh @ 0:ebdb0cecebc0 default tip
新增
| author | Pluto <meokcin@gmail.com> |
|---|---|
| date | Sun, 01 Sep 2024 16:38:41 +0800 |
| parents | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/openvpn-install-Nyr.sh Sun Sep 01 16:38:41 2024 +0800 @@ -0,0 +1,560 @@ +#!/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 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" && "$os_version" -lt 2204 ]]; then + echo "Ubuntu 22.04 or higher is required to use this installer. +This version of Ubuntu is too old and unsupported." + exit +fi + +if [[ "$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 [[ "$os_version" -lt 11 ]]; then + echo "Debian 11 or higher is required to use this installer. +This version of Debian is too old and unsupported." + exit + fi +fi + +if [[ "$os" == "centos" && "$os_version" -lt 9 ]]; then + os_name=$(sed 's/ release.*//' /etc/almalinux-release /etc/rocky-release /etc/centos-release 2>/dev/null | head -1) + echo "$os_name 9 or higher is required to use this installer. +This version of $os_name 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 "<ca>" + cat /etc/openvpn/server/easy-rsa/pki/ca.crt + echo "</ca>" + echo "<cert>" + sed -ne '/BEGIN CERTIFICATE/,$ p' /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt + echo "</cert>" + echo "<key>" + cat /etc/openvpn/server/easy-rsa/pki/private/"$client".key + echo "</key>" + echo "<tls-crypt>" + sed -ne '/BEGIN OpenVPN Static key/,$ p' /etc/openvpn/server/tc.key + echo "</tls-crypt>" + } > ~/"$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 + dnf install -y epel-release + dnf 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/v3.2.0/EasyRSA-3.2.0.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 + dnf install -y policycoreutils-python-utils + 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 + dnf 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
