#!/bin/bash # # https://github.com/hwdsl2/openvpn-install # # Based on the work of Nyr and contributors at: # https://github.com/Nyr/openvpn-install # # Copyright (c) 2022-2023 Lin Song # Copyright (c) 2013-2023 Nyr # # Released under the MIT License, see the accompanying file LICENSE.txt # or https://opensource.org/licenses/MIT # 错误处理函数 exiterr() { echo "Error: $1" >&2; exit 1; } exiterr2() { exiterr "'apt-get install' failed."; } exiterr3() { exiterr "'yum install' failed."; } # IP地址验证函数 check_ip() { IP_REGEX='^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$' printf '%s' "$1" | tr -d '\n' | grep -Eq "$IP_REGEX" } # 操作系统检测函数 check_os() { 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=$(grep -shoE '[0-9]+' /etc/almalinux-release /etc/rocky-release /etc/centos-release | head -1) group_name="nobody" elif grep -qs "Amazon Linux release 2 " /etc/system-release; then os="centos" os_version="7" group_name="nobody" elif grep -qs "Amazon Linux release 2023" /etc/system-release; then exiterr "Amazon Linux 2023 is not supported." elif [[ -e /etc/fedora-release ]]; then os="fedora" os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1) group_name="nobody" else exiterr "This installer seems to be running on an unsupported distribution. Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS, Fedora and Amazon Linux 2." fi } # 操作系统版本检查函数 check_os_ver() { if [[ "$os" == "ubuntu" && "$os_version" -lt 1804 ]]; then exiterr "Ubuntu 18.04 or higher is required to use this installer. This version of Ubuntu is too old and unsupported." fi if [[ "$os" == "debian" && "$os_version" -lt 9 ]]; then exiterr "Debian 9 or higher is required to use this installer. This version of Debian is too old and unsupported." fi if [[ "$os" == "centos" && "$os_version" -lt 7 ]]; then exiterr "CentOS 7 or higher is required to use this installer. This version of CentOS is too old and unsupported." fi } # nftables检查函数（不支持nftables） check_nftables() { if [ "$os" = "centos" ]; then if grep -qs "hwdsl2 VPN script" /etc/sysconfig/nftables.conf \ || systemctl is-active --quiet nftables 2>/dev/null; then exiterr "This system has nftables enabled, which is not supported by this installer." fi fi } # wget安装函数 install_wget() { # 检测Debian最小系统（可能缺少wget和curl） if ! hash wget 2>/dev/null && ! hash curl 2>/dev/null; then if [ "$auto" = 0 ]; then echo "Wget is required to use this installer." read -n1 -r -p "Press any key to install Wget and continue..." fi export DEBIAN_FRONTEND=noninteractive ( set -x apt-get -yqq update || apt-get -yqq update apt-get -yqq install wget >/dev/null ) || exiterr2 fi } # iproute安装函数（网络工具） install_iproute() { if ! hash ip 2>/dev/null; then if [ "$auto" = 0 ]; then echo "iproute is required to use this installer." read -n1 -r -p "Press any key to install iproute and continue..." fi if [ "$os" = "debian" ] || [ "$os" = "ubuntu" ]; then export DEBIAN_FRONTEND=noninteractive ( set -x apt-get -yqq update || apt-get -yqq update apt-get -yqq install iproute2 >/dev/null ) || exiterr2 else ( set -x yum -y -q install iproute >/dev/null ) || exiterr3 fi fi } # 安装开始提示函数 show_start_setup() { if [ "$auto" = 0 ]; then echo echo 'Welcome to this OpenVPN server installer! (Default TCP Protocol)' echo 'GitHub: https://github.com/hwdsl2/openvpn-install' 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.' else show_header echo echo 'Starting OpenVPN setup using default options. (Default TCP Protocol)' fi } # 公网IP获取函数 find_public_ip() { ip_url1="http://ipv4.icanhazip.com" ip_url2="http://ip1.dynupdate.no-ip.com" # 获取公网IP并通过grep过滤格式 get_public_ip=$(grep -m 1 -oE '^[0-9]{1,3}(\.[0-9]{1,3}){3}$' <<< "$(wget -T 10 -t 1 -4qO- "$ip_url1" || curl -m 10 -4Ls "$ip_url1")") if ! check_ip "$get_public_ip"; then get_public_ip=$(grep -m 1 -oE '^[0-9]{1,3}(\.[0-9]{1,3}){3}$' <<< "$(wget -T 10 -t 1 -4qO- "$ip_url2" || curl -m 10 -4Ls "$ip_url2")") fi } # 服务器IP检测函数 detect_ip() { # 若系统只有一个IPv4，自动选择 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 # 使用默认路由的IP地址 ip=$(ip -4 route get 1 | sed 's/ uid .*//' | awk '{print $NF;exit}' 2>/dev/null) if ! check_ip "$ip"; then find_public_ip ip_match=0 if [ -n "$get_public_ip" ]; then ip_list=$(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}') while IFS= read -r line; do if [ "$line" = "$get_public_ip" ]; then ip_match=1 ip="$line" fi done <<< "$ip_list" fi if [ "$ip_match" = 0 ]; then if [ "$auto" = 0 ]; then echo echo "Which IPv4 address should be used?" number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}') ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | nl -s ') ' read -rp "IPv4 address [1]: " ip_number until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$number_of_ip" ]]; do echo "$ip_number: invalid selection." read -rp "IPv4 address [1]: " ip_number done [[ -z "$ip_number" ]] && ip_number=1 else ip_number=1 fi 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 fi fi if ! check_ip "$ip"; then echo "Error: Could not detect this server's IP address." >&2 echo "Abort. No changes were made." >&2 exit 1 fi } # NAT IP检查函数（判断是否在NAT后） check_nat_ip() { # 若IP是私有地址，说明服务器在NAT后 if printf '%s' "$ip" | grep -qE '^(10|127|172\.(1[6-9]|2[0-9]|3[0-1])|192\.168|169\.254)\.'; then find_public_ip if ! check_ip "$get_public_ip"; then if [ "$auto" = 0 ]; then echo echo "This server is behind NAT. What is the public IPv4 address?" read -rp "Public IPv4 address: " public_ip until check_ip "$public_ip"; do echo "Invalid input." read -rp "Public IPv4 address: " public_ip done else echo "Error: Could not detect this server's public IP." >&2 echo "Abort. No changes were made." >&2 exit 1 fi else public_ip="$get_public_ip" fi fi } # 配置信息显示函数 show_config() { if [ "$auto" != 0 ]; then echo printf '%s' "Server IP: " [ -n "$public_ip" ] && printf '%s\n' "$public_ip" || printf '%s\n' "$ip" echo "Port: TCP/$port" # 【修改】使用变量显示端口 echo "Client name: pinode" echo "Client DNS: Google Public DNS" fi } # IPv6检测函数 detect_ipv6() { # 若系统只有一个IPv6，自动选择 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 # 若系统有多个IPv6，提示用户选择 if [[ $(ip -6 addr | grep -c 'inet6 [23]') -gt 1 ]]; then if [ "$auto" = 0 ]; then echo echo "Which IPv6 address should be used?" number_of_ip6=$(ip -6 addr | grep -c 'inet6 [23]') ip -6 addr | grep 'inet6 [23]' | cut -d '/' -f 1 | grep -oE '([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}' | nl -s ') ' read -rp "IPv6 address [1]: " ip6_number until [[ -z "$ip6_number" || "$ip6_number" =~ ^[0-9]+$ && "$ip6_number" -le "$number_of_ip6" ]]; do echo "$ip6_number: invalid selection." read -rp "IPv6 address [1]: " ip6_number done [[ -z "$ip6_number" ]] && ip6_number=1 else ip6_number=1 fi 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 } # 协议选择函数（默认TCP，隐藏UDP选项） select_protocol() { if [ "$auto" = 0 ]; then echo echo "Which protocol should OpenVPN use? (Default: TCP)" echo " 1) TCP (recommended for stability)" # 仅保留TCP选项 read -rp "Protocol [1]: " protocol until [[ -z "$protocol" || "$protocol" =~ ^[1]$ ]]; do # 仅允许输入1或空 echo "$protocol: invalid selection. Only TCP is supported." read -rp "Protocol [1]: " protocol done else protocol=1 # 自动模式默认选择TCP fi # 固定设置为TCP，忽略其他输入 protocol=tcp } # 端口选择函数（【修改】支持外部传入端口） select_port() { # 若通过--port参数传入端口，直接使用，不提示用户 if [ -n "$external_port" ]; then port="$external_port" return fi if [ "$auto" = 0 ]; then echo echo "What port should OpenVPN listen to? (Default: 2868)" read -rp "Port [2868]: " port until [[ -z "$port" || "$port" =~ ^[0-9]+$ && "$port" -le 65535 ]]; do echo "$port: invalid port. Port must be between 1-65535." read -rp "Port [2868]: " port done [[ -z "$port" ]] && port=2868 else port=2868 # 自动模式默认端口 fi } # 自定义DNS输入函数 enter_custom_dns() { read -rp "Enter primary DNS server: " dns1 until check_ip "$dns1"; do echo "Invalid DNS server. Please enter a valid IPv4 address." read -rp "Enter primary DNS server: " dns1 done read -rp "Enter secondary DNS server (Enter to skip): " dns2 until [ -z "$dns2" ] || check_ip "$dns2"; do echo "Invalid DNS server. Please enter a valid IPv4 address or press Enter to skip." read -rp "Enter secondary DNS server (Enter to skip): " dns2 done } # DNS选择函数 select_dns() { if [ "$auto" = 0 ]; then echo echo "Select a DNS server for the clients: (Default: Google Public DNS)" echo " 1) Current system resolvers" echo " 2) Google Public DNS (recommended)" echo " 3) Cloudflare DNS" echo " 4) OpenDNS" echo " 5) Quad9" echo " 6) AdGuard DNS" echo " 7) Custom" read -rp "DNS server [2]: " dns until [[ -z "$dns" || "$dns" =~ ^[1-7]$ ]]; do echo "$dns: invalid selection. Please enter a number between 1-7." read -rp "DNS server [2]: " dns done else dns=2 # 自动模式默认Google DNS fi if [ "$dns" = 7 ]; then enter_custom_dns fi } # 客户端名称处理函数（过滤非法字符） set_client_name() { # 只允许数字、字母、下划线和短横线，其他字符替换为下划线 client=$(sed 's/[^0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-]/_/g' <<< "$unsanitized_client") } # 客户端名称输入函数 enter_client_name() { if [ "$auto" = 0 ]; then echo echo "Enter a name for the first client: (Default: pinode)" read -rp "Name [client]: " unsanitized_client set_client_name [[ -z "$client" ]] && client="pinode" # 默认客户端名称 else client="pinode" # 自动模式默认客户端名称 fi } # 防火墙检查函数（安装必要的防火墙工具） check_firewall() { # 若firewalld和iptables均不存在，安装对应防火墙 if ! systemctl is-active --quiet firewalld.service && ! hash iptables 2>/dev/null; then if [[ "$os" == "centos" || "$os" == "fedora" ]]; then firewall="firewalld" echo echo "Note: firewalld (required for routing) will be installed automatically." elif [[ "$os" == "debian" || "$os" == "ubuntu" ]]; then firewall="iptables" fi fi } # 安装中止函数 abort_and_exit() { echo "Abort. No changes were made." >&2 exit 1 } # 安装确认函数 confirm_setup() { if [ "$auto" = 0 ]; then printf "Do you want to continue with OpenVPN installation? [Y/n] " read -r response case $response in [yY][eE][sS]|[yY]|'') : # 确认继续 ;; *) abort_and_exit # 取消安装 ;; esac fi } # 客户端配置文件导出目录获取函数 get_export_dir() { export_to_home_dir=0 export_dir=~/ # 若使用sudo，将配置文件导出到原用户目录 if [ -n "$SUDO_USER" ] && getent group "$SUDO_USER" >/dev/null 2>&1; then user_home_dir=$(getent passwd "$SUDO_USER" 2>/dev/null | cut -d: -f6) if [ -d "$user_home_dir" ] && [ "$user_home_dir" != "/" ]; then export_dir="$user_home_dir/" export_to_home_dir=1 fi fi } # 新客户端配置生成函数 new_client() { get_export_dir # 生成客户端.ovpn配置文件 { 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 "" } > "$export_dir$client".ovpn # 调整文件权限（若导出到原用户目录） if [ "$export_to_home_dir" = 1 ]; then chown "$SUDO_USER:$SUDO_USER" "$export_dir$client".ovpn fi chmod 600 "$export_dir$client".ovpn # 仅所有者可读写 } # 系统参数优化函数（开启IP转发、TCP优化） update_sysctl() { mkdir -p /etc/sysctl.d conf_fwd="/etc/sysctl.d/99-openvpn-forward.conf" conf_opt="/etc/sysctl.d/99-openvpn-optimize.conf" # 开启IPv4转发 echo 'net.ipv4.ip_forward=1' > "$conf_fwd" if [[ -n "$ip6" ]]; then # 若有IPv6，开启IPv6转发 echo "net.ipv6.conf.all.forwarding=1" >> "$conf_fwd" fi # 下载TCP优化配置文件 base_url="https://github.com/hwdsl2/vpn-extras/releases/download/v1.0.0" conf_url="$base_url/sysctl-ovpn-$os" [ "$auto" != 0 ] && conf_url="${conf_url}-auto" # 尝试wget下载，失败则用curl，均失败则创建空文件 wget -t 3 -T 30 -q -O "$conf_opt" "$conf_url" 2>/dev/null \ || curl -m 30 -fsL "$conf_url" -o "$conf_opt" 2>/dev/null \ || { /bin/rm -f "$conf_opt"; touch "$conf_opt"; } # 若内核版本≥4.20，开启TCP BBR拥塞控制（优化网络速度） if modprobe -q tcp_bbr \ && printf '%s\n%s' "4.20" "$(uname -r)" | sort -C -V \ && [ -f /proc/sys/net/ipv4/tcp_congestion_control ]; then cat >> "$conf_opt" <<'EOF' net.core.default_qdisc = fq net.ipv4.tcp_congestion_control = bbr EOF fi # 应用sysctl配置 sysctl -e -q -p "$conf_fwd" sysctl -e -q -p "$conf_opt" } # rc.local更新函数（开机启动防火墙规则） update_rclocal() { ipt_cmd="systemctl restart openvpn-iptables.service" if ! grep -qs "$ipt_cmd" /etc/rc.local; then if [ ! -f /etc/rc.local ]; then echo '#!/bin/sh' > /etc/rc.local else if [ "$os" = "ubuntu" ] || [ "$os" = "debian" ]; then sed --follow-symlinks -i '/^exit 0/d' /etc/rc.local fi fi cat >> /etc/rc.local <> /etc/rc.local fi chmod +x /etc/rc.local # 赋予执行权限 fi } # 脚本头部信息函数 show_header() { cat <<'EOF' >/dev/null OpenVPN Script (Default TCP Protocol) https://github.com/hwdsl2/openvpn-install EOF } # 版权信息函数 show_header2() { cat <<'EOF'>/dev/null Copyright (c) 2022-2023 Lin Song Copyright (c) 2013-2023 Nyr EOF } # 脚本使用说明函数（【修改】新增--port参数说明） show_usage() { if [ -n "$1" ]; then echo "Error: $1" >&2 fi show_header show_header2 cat 1>&2 < $path\e[0m" cert_missing=1 fi done # 若证书缺失，尝试重新生成 if [ "$cert_missing" -eq 1 ]; then echo -e "\n\e[1;33m尝试重新生成缺失的OpenVPN证书文件...\e[0m" cd /etc/openvpn/server/easy-rsa/ || exiterr "无法进入EasyRSA目录，证书修复失败" # 重新初始化PKI并生成证书（保留--batch模式避免交互） ( set -x ./easyrsa --batch init-pki >/dev/null 2>&1 ./easyrsa --batch build-ca nopass >/dev/null 2>&1 ./easyrsa --batch --days=3650 build-server-full server nopass >/dev/null 2>&1 ./easyrsa --batch --days=3650 gen-crl >/dev/null 2>&1 ) || exiterr "证书重新生成失败，可能导致Peer certificate verification failure" # 重新复制证书到指定目录 cp -f pki/ca.crt pki/private/ca.key pki/issued/server.crt pki/private/server.key pki/crl.pem /etc/openvpn/server chown nobody:"$group_name" /etc/openvpn/server/crl.pem chmod o+x /etc/openvpn/server/ # 重新生成tls-crypt密钥 openvpn --genkey --secret /etc/openvpn/server/tc.key >/dev/null 2>&1 || exiterr "tls-crypt密钥生成失败" echo -e "\e[1;32m证书文件重新生成完成！\e[0m" else echo -e "\e[1;32m所有证书文件存在且完整，跳过修复步骤\e[0m" fi # 检查客户端配置文件中的证书引用是否正确 if [ -f "$export_dir$client.ovpn" ]; then echo -e "\n\e[1;33m检测客户端配置文件（$export_dir$client.ovpn）证书引用...\e[0m" # 检查配置文件中是否包含完整的CA、cert、key、tls-crypt块 local cert_blocks=("" "" "" "") local block_missing=0 for block in "${cert_blocks[@]}"; do if ! grep -qs "$block" "$export_dir$client.ovpn"; then echo -e "\e[1;31m警告：客户端配置文件缺失$block块，可能导致证书验证失败\e[0m" block_missing=1 fi done # 若配置文件缺失证书块，重新生成客户端配置 if [ "$block_missing" -eq 1 ]; then echo -e "\e[1;33m重新生成客户端配置文件以修复证书引用...\e[0m" new_client echo -e "\e[1;32m客户端配置文件重新生成完成！\e[0m" else echo -e "\e[1;32m客户端配置文件证书引用正常\e[0m" fi fi # 输出证书验证失败的手动排查指南 echo -e "\n\e[1;32m=== Peer certificate verification failure 排查指南 ===\e[0m" echo -e "1. 客户端连接时出现此错误，优先检查：" echo -e " - 客户端配置文件（.ovpn）是否完整，是否包含、、、完整块" echo -e " - 服务器端证书文件是否存在且未损坏：/etc/openvpn/server/*.crt /etc/openvpn/server/*.key" echo -e "2. 手动修复命令：" echo -e " - 重新生成服务器证书：sudo bash $0（选择添加新客户端，自动修复证书链）" echo -e " - 验证证书有效性：openssl x509 -in /etc/openvpn/server/ca.crt -noout -text" echo -e "3. 若仍失败，检查服务器时间是否同步（证书有效期依赖系统时间）：" echo -e " - 安装时间同步工具：sudo apt-get install ntpdate（Debian/Ubuntu）或 sudo yum install ntpdate（CentOS）" echo -e " - 同步时间：sudo ntpdate pool.ntp.org" echo -e "======================================================\e[0m" } # OpenVPN主安装函数 ovpnsetup() { export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" # 检查是否为root用户 if [ "$(id -u)" != 0 ]; then exiterr "This installer must be run as root. Try 'sudo bash $0'" fi # 检查是否用sh执行（Debian可能默认dash，不兼容） if readlink /proc/$$/exe | grep -q "dash"; then exiterr 'This installer needs to be run with "bash", not "sh".' fi # 检查内核版本（不支持2.x内核，如OpenVZ 6） if [[ $(uname -r | cut -d "." -f 1) -eq 2 ]]; then exiterr "The system is running an old kernel, which is incompatible with this installer." fi # 检查操作系统及版本 check_os check_os_ver # 检查TUN设备（OpenVPN必需） if [[ ! -e /dev/net/tun ]] || ! ( exec 7<>/dev/net/tun ) 2>/dev/null; then exiterr "The system does not have the TUN device available. TUN needs to be enabled before running this installer." fi auto=0 external_port="" # 【新增】存储外部传入的端口变量 # 若未安装OpenVPN，执行全新安装流程 if [[ ! -e /etc/openvpn/server/server.conf ]]; then check_nftables # 解析命令行参数（【修改】新增--port参数解析） while [ "$#" -gt 0 ]; do case $1 in --auto) auto=1 shift ;; --port) # 新增--port参数处理 if [[ -n "$2" && "$2" =~ ^[0-9]+$ && "$2" -ge 1 && "$2" -le 65535 ]]; then external_port="$2" shift 2 else show_usage "Invalid port value for --port (must be 1-65535)" fi ;; -h|--help) show_usage ;; *) show_usage "Unknown parameter: $1" ;; esac done # 安装必要依赖 install_wget install_iproute # 显示安装开始提示 show_start_setup # 检测服务器IP detect_ip # 检查是否在NAT后 check_nat_ip # 显示自动模式配置信息 show_config # 检测IPv6 detect_ipv6 # 选择协议（默认TCP） select_protocol # 选择端口（【修改】支持外部传入端口） select_port # 选择DNS select_dns # 输入客户端名称 enter_client_name # 显示安装确认提示 if [ "$auto" = 0 ]; then echo echo "OpenVPN installation is ready to begin. (Protocol: TCP, Port: $port)" fi # 检查防火墙 check_firewall # 确认安装 confirm_setup echo echo "Installing OpenVPN (TCP), please wait..." # 容器环境兼容处理（禁用LimitNPROC） if systemd-detect-virt -cq; then mkdir /etc/systemd/system/openvpn-server@server.service.d/ 2>/dev/null echo "[Service] LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf fi # 按操作系统安装OpenVPN及依赖 if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then export DEBIAN_FRONTEND=noninteractive # 安装OpenVPN ( set -x apt-get -yqq update || apt-get -yqq update apt-get -yqq --no-install-recommends install openvpn >/dev/null ) || exiterr2 # 安装证书工具和防火墙 ( set -x apt-get -yqq install openssl ca-certificates $firewall >/dev/null ) || exiterr2 elif [[ "$os" = "centos" ]]; then # 亚马逊Linux 2需安装EPEL源 if grep -qs "Amazon Linux release 2 " /etc/system-release; then ( set -x amazon-linux-extras install epel -y >/dev/null ) || exit 1 else # 其他CentOS版本安装EPEL源 ( set -x yum -y -q install epel-release >/dev/null ) || exiterr3 fi # 安装OpenVPN及依赖 ( set -x yum -y -q install openvpn openssl ca-certificates tar $firewall >/dev/null 2>&1 ) || exiterr3 else # Fedora系统安装 ( set -x dnf install -y openvpn openssl ca-certificates tar $firewall >/dev/null ) || exiterr "'dnf install' failed." fi # 若刚安装firewalld，启用并启动 if [[ "$firewall" == "firewalld" ]]; then ( set -x systemctl enable --now firewalld.service >/dev/null 2>&1 ) fi # 下载并安装EasyRSA（证书生成工具） easy_rsa_url='https://github.com/OpenVPN/easy-rsa/releases/download/v3.1.5/EasyRSA-3.1.5.tgz' mkdir -p /etc/openvpn/server/easy-rsa/ # 下载并解压EasyRSA { wget -t 3 -T 30 -qO- "$easy_rsa_url" 2>/dev/null || curl -m 30 -sL "$easy_rsa_url" ; } | tar xz -C /etc/openvpn/server/easy-rsa/ --strip-components 1 # 检查EasyRSA是否下载成功 if [ ! -f /etc/openvpn/server/easy-rsa/easyrsa ]; then exiterr "Failed to download EasyRSA from $easy_rsa_url." fi # 调整权限 chown -R root:root /etc/openvpn/server/easy-rsa/ cd /etc/openvpn/server/easy-rsa/ || exit 1 # 生成PKI、CA证书、服务器和客户端证书 ( set -x ./easyrsa --batch init-pki >/dev/null ./easyrsa --batch build-ca nopass >/dev/null 2>&1 ./easyrsa --batch --days=3650 build-server-full server nopass >/dev/null 2>&1 ./easyrsa --batch --days=3650 build-client-full "$client" nopass >/dev/null 2>&1 ./easyrsa --batch --days=3650 gen-crl >/dev/null 2>&1 ) # 复制证书和密钥到OpenVPN目录 cp pki/ca.crt pki/private/ca.key pki/issued/server.crt pki/private/server.key pki/crl.pem /etc/openvpn/server # 调整CRL文件权限（OpenVPN运行时用nobody用户） chown nobody:"$group_name" /etc/openvpn/server/crl.pem # 目录权限调整（允许nobody用户访问CRL文件） chmod o+x /etc/openvpn/server/ # 生成tls-crypt密钥（增强安全性） ( set -x openvpn --genkey --secret /etc/openvpn/server/tc.key >/dev/null ) # 生成DH参数文件（预定义ffdhe2048，避免耗时生成） 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 # 生成OpenVPN服务器配置文件（server.conf） echo "local $ip port $port proto $protocol dev tun ca ca.crt cert server.crt key server.key dh dh.pem auth SHA256 tls-crypt tc.key topology subnet server 10.8.0.0 255.255.255.0" > /etc/openvpn/server/server.conf # IPv6配置（根据检测结果调整） if [[ -z "$ip6" ]]; then echo 'push "block-ipv6"' >> /etc/openvpn/server/server.conf echo 'push "ifconfig-ipv6 fddd:2868:2868:2868::2/64 fddd:2868:2868:2868::1"' >> /etc/openvpn/server/server.conf else echo 'server-ipv6 fddd:2868:2868:2868::/64' >> /etc/openvpn/server/server.conf fi # 客户端路由配置（强制所有流量走VPN） echo 'push "redirect-gateway def1 ipv6 bypass-dhcp"' >> /etc/openvpn/server/server.conf echo 'ifconfig-pool-persist ipp.txt' >> /etc/openvpn/server/server.conf # DNS配置（根据用户选择写入） case "$dns" in 1) # 使用系统当前DNS（适配systemd-resolved） if grep '^nameserver' "/etc/resolv.conf" | grep -qv '127.0.0.53' ; then resolv_conf="/etc/resolv.conf" else resolv_conf="/run/systemd/resolve/resolv.conf" fi # 提取DNS服务器并写入配置 grep -v '^#\|^;' "$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|"") # Google Public DNS 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) # Cloudflare DNS 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) # OpenDNS 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) # Quad9 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) # AdGuard DNS 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 ;; 7) # 自定义DNS echo "push \"dhcp-option DNS $dns1\"" >> /etc/openvpn/server/server.conf if [ -n "$dns2" ]; then echo "push \"dhcp-option DNS $dns2\"" >> /etc/openvpn/server/server.conf fi ;; esac # 客户端额外配置（阻止外部DNS、保持连接、加密算法等） echo 'push "block-outside-dns"' >> /etc/openvpn/server/server.conf echo "keepalive 10 120 cipher AES-128-GCM user nobody group $group_name persist-key persist-tun verb 3 crl-verify crl.pem" >> /etc/openvpn/server/server.conf # TCP协议无需explicit-exit-notify（仅UDP需要） # 移除原UDP相关配置 if [[ "$protocol" = "udp" ]]; then echo "explicit-exit-notify" >> /etc/openvpn/server/server.conf fi # 优化系统参数（开启转发、TCP优化） update_sysctl # 配置防火墙规则（根据防火墙类型） if systemctl is-active --quiet firewalld.service; then # firewalld配置（临时+永久规则，避免重载） firewall-cmd -q --add-port="$port"/"$protocol" firewall-cmd -q --zone=trusted --add-source=10.8.0.0/24 firewall-cmd -q --permanent --add-port="$port"/"$protocol" firewall-cmd -q --permanent --zone=trusted --add-source=10.8.0.0/24 # IPv4 NAT配置 firewall-cmd -q --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip" firewall-cmd -q --permanent --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip" # IPv6配置（若有） if [[ -n "$ip6" ]]; then firewall-cmd -q --zone=trusted --add-source=fddd:2868:2868:2868::/64 firewall-cmd -q --permanent --zone=trusted --add-source=fddd:2868:2868:2868::/64 firewall-cmd -q --direct --add-rule ipv6 nat POSTROUTING 0 -s fddd:2868:2868:2868::/64 ! -d fddd:2868:2868:2868::/64 -j SNAT --to "$ip6" firewall-cmd -q --permanent --direct --add-rule ipv6 nat POSTROUTING 0 -s fddd:2868:2868:2868::/64 ! -d fddd:2868:2868:2868::/64 -j SNAT --to "$ip6" fi else # iptables配置（创建systemd服务，持久化规则） iptables_path=$(command -v iptables) ip6tables_path=$(command -v ip6tables) # OpenVZ环境兼容（使用iptables-legacy） 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 # 生成iptables服务文件 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=$iptables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" > /etc/systemd/system/openvpn-iptables.service # IPv6 iptables配置（若有） if [[ -n "$ip6" ]]; then echo "ExecStart=$ip6tables_path -t nat -A POSTROUTING -s fddd:2868:2868:2868::/64 ! -d fddd:2868:2868:2868::/64 -j SNAT --to $ip6 ExecStart=$ip6tables_path -I FORWARD -s fddd:2868:2868:2868::/64 -j ACCEPT ExecStart=$ip6tables_path -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT ExecStop=$ip6tables_path -t nat -D POSTROUTING -s fddd:2868:2868:2868::/64 ! -d fddd:2868:2868:2868::/64 -j SNAT --to $ip6 ExecStop=$ip6tables_path -D FORWARD -s fddd:2868:2868:2868::/64 -j ACCEPT ExecStop=$ip6tables_path -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" >> /etc/systemd/system/openvpn-iptables.service fi echo "RemainAfterExit=yes [Install] WantedBy=multi-user.target" >> /etc/systemd/system/openvpn-iptables.service # 启用并启动iptables服务 ( set -x systemctl enable --now openvpn-iptables.service >/dev/null 2>&1 ) fi # 更新rc.local（开机启动iptables服务） update_rclocal # SELinux兼容处理（若启用且端口非默认） if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 2868 ]]; then # 安装semanage工具 if ! hash semanage 2>/dev/null; then if [[ "$os_version" -eq 7 ]]; then # CentOS 7 ( set -x yum -y -q install policycoreutils-python >/dev/null ) || exiterr3 else # CentOS 8/9或Fedora ( set -x dnf install -y policycoreutils-python-utils >/dev/null ) || exiterr "'dnf install' failed." fi fi # 添加SELinux端口规则 semanage port -a -t openvpn_port_t -p "$protocol" "$port" fi # 若服务器在NAT后，使用公网IP生成客户端配置 [[ -n "$public_ip" ]] && ip="$public_ip" # 生成客户端配置模板（后续添加新客户端用） echo "client dev tun proto $protocol remote $ip $port resolv-retry infinite nobind persist-key persist-tun remote-cert-tls server auth SHA256 cipher AES-128-GCM ignore-unknown-option block-outside-dns block-ipv6 verb 3" > /etc/openvpn/server/client-common.txt # 启用并启动OpenVPN服务 ( set -x systemctl enable --now openvpn-server@server.service >/dev/null 2>&1 ) # 生成第一个客户端配置文件 new_client # 【新增】安装完成后执行证书验证失败检测与修复 check_cert_issue # 安装完成提示 echo echo "OpenVPN (TCP) installation finished!" echo echo "Client configuration file: $export_dir$client.ovpn" echo "To add new clients, run this script again." else # 若已安装OpenVPN，显示管理菜单 show_header echo echo "OpenVPN (TCP) is already installed." echo echo "Select an option:" echo " 1) Add a new client" echo " 2) Export config for an existing client" echo " 3) List existing clients" echo " 4) Revoke an existing client" echo " 5) Remove OpenVPN" echo " 6) Fix Peer certificate verification failure (证书验证失败修复)" # 【新增】证书修复选项 echo " 7) Exit" # 【修改】调整退出选项序号 read -rp "Option: " option # 验证输入 until [[ "$option" =~ ^[1-7]$ ]]; do # 【修改】支持1-7选项 echo "$option: invalid selection. Please enter a number between 1-7." read -rp "Option: " option done # 根据选择执行对应操作 case "$option" in 1) # 添加新客户端 echo echo "Provide a name for the new client:" read -rp "Name: " unsanitized_client [ -z "$unsanitized_client" ] && abort_and_exit set_client_name # 检查客户端名称是否已存在 while [[ -z "$client" || -e /etc/openvpn/server/easy-rsa/pki/issued/"$client".crt ]]; do echo "$client: invalid name (already exists or empty)." read -rp "Name: " unsanitized_client [ -z "$unsanitized_client" ] && abort_and_exit set_client_name done # 生成新客户端证书 cd /etc/openvpn/server/easy-rsa/ || exit 1 ( set -x ./easyrsa --batch --days=3650 build-client-full "$client" nopass >/dev/null 2>&1 ) # 生成客户端配置文件 new_client # 【新增】添加新客户端后自动检测证书配置 check_cert_issue echo echo "$client added successfully. Configuration file: $export_dir$client.ovpn" exit ;; 2) # 导出已有客户端配置 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 export:" tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') ' read -rp "Client number: " client_number [ -z "$client_number" ] && abort_and_exit # 验证输入 until [[ "$client_number" =~ ^[0-9]+$ && "$client_number" -le "$number_of_clients" ]]; do echo "$client_number: invalid selection. Please enter a number between 1-$number_of_clients." read -rp "Client number: " client_number [ -z "$client_number" ] && abort_and_exit done # 获取客户端名称并导出 client=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$client_number"p) new_client # 【新增】导出客户端配置后检测证书引用 check_cert_issue echo echo "$client exported successfully. Configuration file: $export_dir$client.ovpn" exit ;; 3) # 列出已有客户端 echo echo "Checking for existing clients..." 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 "Existing clients:" tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | nl -s ') ' # 显示客户端总数 if [ "$number_of_clients" = 1 ]; then printf '\nTotal: 1 client\n' else printf '\nTotal: %d clients\n' "$number_of_clients" fi ;; 4) # 吊销已有客户端 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 -rp "Client number: " client_number [ -z "$client_number" ] && abort_and_exit # 验证输入 until [[ "$client_number" =~ ^[0-9]+$ && "$client_number" -le "$number_of_clients" ]]; do echo "$client_number: invalid selection. Please enter a number between 1-$number_of_clients." read -rp "Client number: " client_number [ -z "$client_number" ] && abort_and_exit done # 获取客户端名称并确认吊销 client=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | sed -n "$client_number"p) echo read -rp "Confirm revocation of $client? [y/N]: " revoke until [[ "$revoke" =~ ^[yYnN]*$ ]]; do echo "$revoke: invalid selection. Please enter y or n." read -rp "Confirm revocation of $client? [y/N]: " revoke done # 执行吊销 if [[ "$revoke" =~ ^[yY]$ ]]; then echo echo "Revoking $client..." cd /etc/openvpn/server/easy-rsa/ || exit 1 ( set -x ./easyrsa --batch revoke "$client" >/dev/null 2>&1 ./easyrsa --batch --days=3650 gen-crl >/dev/null 2>&1 ) # 更新CRL文件 rm -f /etc/openvpn/server/crl.pem cp /etc/openvpn/server/easy-rsa/pki/crl.pem /etc/openvpn/server/crl.pem chown nobody:"$group_name" /etc/openvpn/server/crl.pem # 删除客户端配置文件（若存在） get_export_dir ovpn_file="$export_dir$client.ovpn" if [ -f "$ovpn_file" ]; then echo "Removing $ovpn_file..." rm -f "$ovpn_file" fi echo echo "$client revoked successfully!" else echo echo "$client revocation aborted!" fi exit ;; 5) # 卸载OpenVPN echo read -rp "Confirm OpenVPN removal? [y/N]: " remove until [[ "$remove" =~ ^[yYnN]*$ ]]; do echo "$remove: invalid selection. Please enter y or n." read -rp "Confirm OpenVPN removal? [y/N]: " remove done # 执行卸载 if [[ "$remove" =~ ^[yY]$ ]]; then echo echo "Removing OpenVPN, please wait..." # 获取当前端口和协议 port=$(grep '^port ' /etc/openvpn/server/server.conf | cut -d " " -f 2) protocol=$(grep '^proto ' /etc/openvpn/server/server.conf | cut -d " " -f 2) # 清理防火墙规则 if systemctl is-active --quiet firewalld.service; then ip=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.8.0.0/24 '"'"'!'"'"' -d 10.8.0.0/24' | grep -oE '[^ ]+$') # 移除临时+永久规则 firewall-cmd -q --remove-port="$port"/"$protocol" firewall-cmd -q --zone=trusted --remove-source=10.8.0.0/24 firewall-cmd -q --permanent --remove-port="$port"/"$protocol" firewall-cmd -q --permanent --zone=trusted --remove-source=10.8.0.0/24 firewall-cmd -q --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip" firewall-cmd -q --permanent --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to "$ip" # 清理IPv6规则（若有） if grep -qs "server-ipv6" /etc/openvpn/server/server.conf; then ip6=$(firewall-cmd --direct --get-rules ipv6 nat POSTROUTING | grep '\-s fddd:2868:2868:2868::/64 '"'"'!'"'"' -d fddd:2868:2868:2868::/64' | grep -oE '[^ ]+$') firewall-cmd -q --zone=trusted --remove-source=fddd:2868:2868:2868::/64 firewall-cmd -q --permanent --zone=trusted --remove-source=fddd:2868:2868:2868::/64 firewall-cmd -q --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:2868:2868:2868::/64 ! -d fddd:2868:2868:2868::/64 -j SNAT --to "$ip6" firewall-cmd -q --permanent --direct --remove-rule ipv6 nat POSTROUTING 0 -s fddd:2868:2868:2868::/64 ! -d fddd:2868:2868:2868::/64 -j SNAT --to "$ip6" fi else # 停止并禁用iptables服务 systemctl disable --now openvpn-iptables.service rm -f /etc/systemd/system/openvpn-iptables.service fi # 清理SELinux规则（若启用且端口非默认） if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$port" != 2868 ]]; then semanage port -d -t openvpn_port_t -p "$protocol" "$port" fi # 停止并禁用OpenVPN服务 systemctl disable --now openvpn-server@server.service rm -f /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf # 删除sysctl配置文件 rm -f /etc/sysctl.d/99-openvpn-forward.conf /etc/sysctl.d/99-openvpn-optimize.conf # 关闭IP转发（若未安装其他VPN服务） if [ ! -f /usr/bin/wg-quick ] && [ ! -f /usr/sbin/ipsec ] \ && [ ! -f /usr/local/sbin/ipsec ]; then echo 0 > /proc/sys/net/ipv4/ip_forward echo 0 > /proc/sys/net/ipv6/conf/all/forwarding fi # 清理rc.local中的启动命令 ipt_cmd="systemctl restart openvpn-iptables.service" if grep -qs "$ipt_cmd" /etc/rc.local; then sed --follow-symlinks -i "/^$ipt_cmd/d" /etc/rc.local fi # 卸载OpenVPN软件包 if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then ( set -x rm -rf /etc/openvpn/server apt-get remove --purge -y openvpn >/dev/null ) else # CentOS或Fedora ( set -x yum -y -q remove openvpn >/dev/null rm -rf /etc/openvpn/server ) fi echo echo "OpenVPN removed successfully!" else echo echo "OpenVPN removal aborted!" fi exit ;; 6) # 【新增】证书验证失败修复选项 echo -e "\n\e[1;33m=== 执行Peer certificate verification failure 修复流程 ===\e[0m" # 获取导出目录（用于检查客户端配置） get_export_dir # 获取第一个客户端名称（用于修复客户端配置） client=$(tail -n +2 /etc/openvpn/server/easy-rsa/pki/index.txt | grep "^V" | cut -d '=' -f 2 | head -1) if [ -z "$client" ]; then client="pinode" # 若无客户端，使用默认名称 fi # 执行证书检测与修复 check_cert_issue echo -e "\n\e[1;32m证书验证失败修复流程执行完成！\e[0m" echo -e "建议：修复后重新下载客户端配置文件（$export_dir$client.ovpn）并尝试连接" exit ;; 7) # 【修改】退出脚本（原6选项调整为7） exit ;; esac fi } ## 延迟执行安装函数（确保脚本完整加载） ovpnsetup "$@" exit 0