355 lines
15 KiB
Bash
355 lines
15 KiB
Bash
#!/bin/bash
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set -eo pipefail
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# ==============================================================================
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# 网关主机配置变量 - 请根据你的实际环境修改！
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# ==============================================================================
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# 网关主机内网IP (用于其他内网主机连接)
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GATEWAY_LAN_IP="{{ gateway_lan_ip }}"
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GATEWAY_LAN_CIDR="{{ gateway_lan_cidr }}" # 内网网段
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# DHCP 租约范围
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DHCP_START_IP="{{ dhcp_start_ip }}"
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DHCP_END_IP="{{ dhcp_end_ip }}"
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DHCP_LEASE_TIME="{{ dhcp_lease_time }}" # 租约时间，秒 (例如 2 小时)
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# 网关主机网卡名称
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WAN_INTERFACE="{{ wan_interface }}" # 连接外网的网卡，通常是DHCP获取IP
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LAN_INTERFACE="{{ lan_interface }}" # 连接内网的网卡，我们将配置静态IP
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# SSH SOCKS5 代理配置
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REMOTE_SSH_USER="{{ remote_ssh_user }}" # 远程服务器的SSH用户名
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REMOTE_SSH_IP="{{ remote_ssh_ip }}" # 远程服务器的IP地址
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REMOTE_SSH_PORT="{{ remote_ssh_port }}" # 远程服务器的SSH端口
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LOCAL_SOCKS5_PORT="{{ local_socks5_port }}" # SSH SOCKS5 代理在本机监听的端口 (127.0.0.1:1080)
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# 透明代理工具 redsocks2 监听端口
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REDSOCKS_PORT="{{ redsocks_port }}" # redsocks2 在本机监听的端口
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# DNSMASQ 配置
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DNSMASQ_LISTEN_IP="${GATEWAY_LAN_IP}" # dnsmasq 监听的IP
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DOMESTIC_DNS="{{ domestic_dns }}" # 国内DNS服务器
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FOREIGN_DNS="{{ foreign_dns }}" # 国外DNS服务器 (通过SSH SOCKS5代理访问)
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# GFWLIST2NEW 工具仓库和安装路径
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GFWLIST2NEW_REPO="{{ gfwlist2new_repo }}"
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GFWLIST2NEW_DIR="{{ gfwlist2new_dir }}"
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# ==============================================================================
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# 通用函数
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# ==============================================================================
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log_info() {
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echo -e "\e[32m[INFO] $(date +'%Y-%m-%d %H:%M:%S') $1\e[0m"
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}
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log_warn() {
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echo -e "\e[33m[WARN] $(date +'%Y-%m-%d %H:%M:%S') $1\e[0m" >&2
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}
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log_error() {
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echo -e "\e[31m[ERROR] $(date +'%Y-%m-%d %H:%M:%S') $1\e[0m" >&2
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exit 1
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}
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check_root() {
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if [[ $EUID -ne 0 ]]; then
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log_error "此脚本必须以 root 用户或使用 sudo 运行。"
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fi
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}
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install_package() {
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PACKAGE="$1"
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if ! dpkg -s "$PACKAGE" &>/dev/null; then
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log_info "安装 $PACKAGE..."
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sudo apt install -y "$PACKAGE" || log_error "安装 $PACKAGE 失败。"
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else
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log_info "$PACKAGE 已安装。"
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fi
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}
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# ==============================================================================
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# 0. 前置检查与环境初始化
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# ==============================================================================
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check_root
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log_info "开始网关主机配置脚本..."
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log_info "更新系统软件包列表..."
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sudo apt update || log_error "apt update 失败。"
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log_info "禁用 UFW 以避免与 iptables 冲突..."
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sudo ufw disable || log_warn "UFW 未运行或禁用失败，请手动确认。"
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log_info "安装必要工具：net-tools, iptables-persistent, ipset, dnsmasq, redsocks2, git, python3-pip, isc-dhcp-server..."
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install_package net-tools
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install_package iptables-persistent
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install_package ipset
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install_package dnsmasq
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install_package redsocks2
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install_package git
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install_package python3-pip
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install_package isc-dhcp-server # 新增 DHCP 服务器安装
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# ==============================================================================
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# 1. 配置内网网卡 IP 和 IP 转发
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# ==============================================================================
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log_info "配置网关主机内网网卡 (${LAN_INTERFACE}) 静态 IP..."
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# Netplan 配置
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NETPLAN_FILE="/etc/netplan/01-netcfg.yaml"
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# 备份现有配置
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sudo cp ${NETPLAN_FILE} ${NETPLAN_FILE}.bak_$(date +%Y%m%d%H%M%S) || log_warn "备份Netplan文件失败。"
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cat <<EOF | sudo tee ${NETPLAN_FILE} > /dev/null
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network:
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version: 2
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renderer: networkd
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ethernets:
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{{ wan_interface }}:
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dhcp4: true # 外网网卡通常通过DHCP获取IP
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optional: true # 允许此接口暂时不可用
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{{ lan_interface }}:
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addresses:
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- ${GATEWAY_LAN_IP}/24
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# 由于 dnsmasq 也会提供 DNS 服务，这里不需要单独配置 nameservers
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EOF
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sudo netplan try
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sudo netplan apply || log_error "应用 Netplan 配置失败，请检查网卡名称和IP地址。"
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log_info "内网网卡 ${LAN_INTERFACE} 已配置 IP: ${GATEWAY_LAN_IP}。"
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log_info "开启 IP 转发功能..."
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sudo sed -i '/^#net.ipv4.ip_forward=1/s/^#//' /etc/sysctl.conf || true # 取消注释
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echo "net.ipv4.ip_forward=1" | sudo tee -a /etc/sysctl.conf > /dev/null # 确保添加
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sudo sysctl -p > /dev/null || log_error "应用 sysctl 配置失败。"
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log_info "IP 转发已开启。"
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# ==============================================================================
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# 2. 配置 DHCP 服务器 (ISC DHCP Server)
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# ==============================================================================
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log_info "配置 ISC DHCP Server..."
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# 确保 DHCP 服务器只监听内网接口
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sudo sed -i "s/^INTERFACESv4=.*/INTERFACESv4=\"${LAN_INTERFACE}\"/g" /etc/default/isc-dhcp-server || log_error "配置 isc-dhcp-server 监听接口失败。"
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# 备份 DHCP 主配置文件
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sudo cp /etc/dhcp/dhcpd.conf /etc/dhcp/dhcpd.conf.bak_$(date +%Y%m%d%H%M%S) || log_warn "备份 dhcpd.conf 失败。"
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# 清空并写入新的 DHCP 配置
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cat <<EOF | sudo tee /etc/dhcp/dhcpd.conf > /dev/null
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# DHCPD CONFIGURATION FILE
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# The ddns-update-style parameter to use for DDNS updates.
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ddns-update-style none;
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# Default lease time
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default-lease-time ${DHCP_LEASE_TIME};
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max-lease-time ${DHCP_LEASE_TIME};
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# If this DHCP server is the official DHCP server for the local network segment
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# then uncomment the authoritative directive.
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authoritative;
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# A slightly different configuration for an internal subnet.
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subnet {{ gateway_lan_cidr%.* }}.0 netmask 255.255.255.0 {
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range ${DHCP_START_IP} ${DHCP_END_IP};
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option routers ${GATEWAY_LAN_IP};
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option domain-name-servers ${GATEWAY_LAN_IP}; # DNS 指向网关主机本身
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option broadcast-address {{ gateway_lan_cidr%.* }}.255;
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default-lease-time ${DHCP_LEASE_TIME};
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max-lease-time ${DHCP_LEASE_TIME};
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}
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# No service will be given on this subnet, but DECLINEs from hosts on this
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# subnet will be processed.
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# subnet 192.168.1.0 netmask 255.255.255.0 {
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# }
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EOF
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sudo systemctl restart isc-dhcp-server || log_error "重启 isc-dhcp-server 服务失败。"
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sudo systemctl enable isc-dhcp-server || log_error "启用 isc-dhcp-server 服务失败。"
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log_info "ISC DHCP Server 已配置并启动，在 ${LAN_INTERFACE} 上提供 DHCP 服务。"
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# ==============================================================================
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# 3. 启动 SSH SOCKS5 代理 (保持不变)
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# ==============================================================================
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log_info "启动 SSH SOCKS5 代理 (${REMOTE_SSH_USER}@${REMOTE_SSH_IP}:${REMOTE_SSH_PORT})..."
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# 检查 SSH 密钥是否存在，否则可能需要密码或生成密钥
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if [ ! -f "$HOME/.ssh/id_rsa" ] && [ ! -f "$HOME/.ssh/id_dsa" ]; then
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log_warn "SSH 密钥文件不存在。SSH 连接可能需要输入密码或先生成密钥对。"
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log_warn "请确保可以无密码SSH登录到远程服务器，或手动输入密码完成连接。"
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fi
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# 确保旧的代理进程被杀死
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sudo pkill -f "ssh -D ${LOCAL_SOCKS5_PORT}" || true
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# 启动 SSH SOCKS5 代理，后台运行
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sudo ssh -D ${LOCAL_SOCKS5_PORT} -N -f -p ${REMOTE_SSH_PORT} ${REMOTE_SSH_USER}@${REMOTE_SSH_IP} -o ExitOnForwardFailure=yes
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if [ $? -ne 0 ]; then
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log_error "SSH SOCKS5 代理启动失败。请检查远程SSH服务器信息和连接。"
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fi
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log_info "SSH SOCKS5 代理已在 127.0.0.1:${LOCAL_SOCKS5_PORT} 启动。"
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# 验证代理是否在监听 (需要一点时间启动)
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sleep 2
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if ! ss -tnlp | grep ":${LOCAL_SOCKS5_PORT}" &>/dev/null; then
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log_error "SSH SOCKS5 代理端口 ${LOCAL_SOCKS5_PORT} 未在监听。请手动检查 SSH 进程。"
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fi
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# ==============================================================================
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# 4. 配置 redsocks2 (透明 SOCKS5 代理) (保持不变)
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# ==============================================================================
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log_info "配置 redsocks2 透明代理..."
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# 备份现有配置
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sudo cp /etc/redsocks.conf /etc/redsocks.conf.bak_$(date +%Y%m%d%H%M%S) || log_warn "备份 redsocks.conf 失败。"
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cat <<EOF | sudo tee /etc/redsocks.conf > /dev/null
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base {
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log_debug = off;
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log_info = on;
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log = "syslog:daemon";
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daemon = on; # 后台运行
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redirector = iptables;
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}
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redsocks {
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local_ip = 127.0.0.1;
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local_port = ${REDSOCKS_PORT};
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ip = 127.0.0.1; # SSH SOCKS5 代理的地址
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port = ${LOCAL_SOCKS5_PORT}; # SSH SOCKS5 代理的端口
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type = socks5; # SOCKS5 代理
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}
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EOF
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sudo systemctl restart redsocks2 || log_error "重启 redsocks2 服务失败。"
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sudo systemctl enable redsocks2 || log_error "启用 redsocks2 服务失败。"
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log_info "redsocks2 透明代理已配置并启动，监听 127.0.0.1:${REDSOCKS_PORT}。"
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# ==============================================================================
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# 5. 配置 dnsmasq 智能 DNS 转发 (保持不变)
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# ==============================================================================
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log_info "配置 dnsmasq 智能 DNS 转发..."
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# 备份现有配置
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sudo cp /etc/dnsmasq.conf /etc/dnsmasq.conf.bak_$(date +%Y%m%d%H%M%S) || log_warn "备份 dnsmasq.conf 失败。"
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sudo rm -f /etc/dnsmasq.d/* # 清理旧的额外配置
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cat <<EOF | sudo tee /etc/dnsmasq.conf > /dev/null
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# 指定监听地址，只监听内网IP和本地环回
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listen-address=${DNSMASQ_LISTEN_IP},127.0.0.1
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# 不使用 /etc/resolv.conf 中的 DNS 服务器
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no-resolv
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no-poll
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# 国内域名直连公共DNS
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server={{ domestic_dns }}
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# 国外域名通过 gfwlist2new 生成的配置文件转发到代理
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# dnsmasq will read additional configuration files from /etc/dnsmasq.d
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conf-dir=/etc/dnsmasq.d
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EOF
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# 注意：DHCP 服务器功能由 isc-dhcp-server 提供，dnsmasq 不再提供 DHCP。
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# 确保 dnsmasq 不会干扰 DHCP
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echo "dhcp-option=option:router,${GATEWAY_LAN_IP}" | sudo tee -a /etc/dnsmasq.conf > /dev/null
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echo "dhcp-option=option:dns-server,${GATEWAY_LAN_IP}" | sudo tee -a /etc/dnsmasq.conf > /dev/null
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sudo systemctl restart dnsmasq || log_error "重启 dnsmasq 服务失败。"
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sudo systemctl enable dnsmasq || log_error "启用 dnsmasq 服务失败。"
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log_info "dnsmasq 智能 DNS 转发已初步配置。"
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# ==============================================================================
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# 6. 安装和配置 gfwlist2new (保持不变)
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# ==============================================================================
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log_info "安装和配置 gfwlist2new 工具..."
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if [ ! -d "${GFWLIST2NEW_DIR}" ]; then
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log_info "克隆 gfwlist2new 仓库..."
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sudo git clone "{{ gfwlist2new_repo }}" "${GFWLIST2NEW_DIR}" || log_error "克隆 gfwlist2new 仓库失败。"
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fi
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cd "${GFWLIST2NEW_DIR}"
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log_info "安装 gfwlist2new 依赖..."
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sudo pip3 install -r requirements.txt || log_error "安装 gfwlist2new 依赖失败。"
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log_info "配置 gfwlist2new 的配置文件 config.conf..."
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# 备份现有配置
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sudo cp config.conf config.conf.bak_$(date +%Y%m%d%H%M%S) || log_warn "备份 gfwlist2new config.conf 失败。"
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# 更新 config.conf 以适应我们的需求
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# gfwlist2new 默认会将 gfwlist 中的域名指向代理IP
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# IPSET_NAME 是 ipset 列表的名称
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# DNSMASQ_CONF_PATH 是 dnsmasq 配置文件路径
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# SOCKS5_SERVER 是代理服务器的IP和端口 (这里是 redsocks2 监听的IP和端口)
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cat <<EOF | sudo tee config.conf > /dev/null
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[DEFAULT]
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# IPSet Config
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IPSET_NAME = gfwlist
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IPSET_FILE = /etc/ipset/gfwlist.conf
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# Dnsmasq Config
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DNSMASQ_CONF_PATH = /etc/dnsmasq.d/gfwlist_router.conf
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DNSMASQ_LOG_PATH = /var/log/dnsmasq.log
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DNS_PROXY_SERVER = 127.0.0.1#${REDSOCKS_PORT} # 这里的端口要指向 redsocks2
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# Proxy Config
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SOCKS5_SERVER = 127.0.0.1:${LOCAL_SOCKS5_PORT} # 这里的端口是SSH SOCKS5代理
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# Other
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GITHUB_RAW_URL = raw.githubusercontent.com
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EOF
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log_info "执行 gfwlist2new 生成 ipset 和 dnsmasq 规则..."
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# 第一次运行，生成规则并应用
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sudo python3 gfwlist2new.py -s "${SOCKS5_SERVER}" -f "{{ foreign_dns }}" -d "{{ domestic_dns }}" || log_error "gfwlist2new 运行失败。"
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# 重启 dnsmasq 应用新规则
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sudo systemctl restart dnsmasq || log_error "重启 dnsmasq (gfwlist) 失败。"
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log_info "设置 gfwlist2new 定时更新任务 (每天凌晨 3:00)..."
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(sudo crontab -l 2>/dev/null; echo "0 3 * * * cd ${GFWLIST2NEW_DIR} && sudo python3 gfwlist2new.py -s ${SOCKS5_SERVER} -f {{ foreign_dns }} -d {{ domestic_dns }} && sudo systemctl restart dnsmasq") | sudo crontab -
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log_info "gfwlist2new 配置完成并设置定时更新。"
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cd - > /dev/null
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# ==============================================================================
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# 7. 配置 IPTABLES 规则实现透明代理和 NAT (保持不变)
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# ==============================================================================
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log_info "配置 IPTABLES 规则 (NAT 和透明代理)..."
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# 清除现有规则，避免冲突
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sudo iptables -F
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sudo iptables -X
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sudo iptables -t nat -F
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sudo iptables -t nat -X
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sudo iptables -t mangle -F
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sudo iptables -t mangle -X
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# 1. 开启 NAT (使内网访问外网)
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sudo iptables -t nat -A POSTROUTING -o {{ wan_interface }} -j MASQUERADE
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log_info "已配置 NAT 规则。"
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# 2. IP 转发规则 (允许内网到外网，并允许已建立连接回传)
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sudo iptables -A FORWARD -i {{ lan_interface }} -o {{ wan_interface }} -j ACCEPT
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sudo iptables -A FORWARD -o {{ lan_interface }} -i {{ wan_interface }} -m state --state RELATED,ESTABLISHED -j ACCEPT
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log_info "已配置 IP 转发规则。"
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# 3. 透明代理规则 (使用 redsocks2 和 ipset)
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# 重定向到 redsocks2 的流量，不处理来自 redsocks2 本身的流量
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sudo iptables -t nat -A PREROUTING -i {{ lan_interface }} -p tcp -s {{ gateway_lan_cidr }} -m set --match-set gfwlist dst -j REDIRECT --to-ports ${REDSOCKS_PORT}
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log_info "已配置透明代理重定向规则 (所有端口，目标IP在 gfwlist 中的内网TCP流量到 redsocks2)。"
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# 排除 redsocks2 自身流量循环
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# 这一步非常重要，避免 redsocks2 自己产生流量又被 iptables 捕获
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sudo iptables -t nat -A OUTPUT -p tcp -d 127.0.0.1 --dport ${REDSOCKS_PORT} -j RETURN
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sudo iptables -t nat -A OUTPUT -p tcp -d 127.0.0.1 --dport ${LOCAL_SOCKS5_PORT} -j RETURN
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log_info "已配置排除 redsocks2 自身流量循环的规则。"
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# 保存 iptables 规则
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sudo netfilter-persistent save || log_error "保存 iptables 规则失败。"
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sudo systemctl enable netfilter-persistent || log_error "启用 netfilter-persistent 服务失败。"
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log_info "IPTABLES 规则已配置并保存。"
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log_info "----------------------------------------------------------------------------------"
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log_info "网关主机配置完成！"
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log_info "请检查 redsocks2 和 ssh -D 进程是否正常运行。"
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log_info "请注意：SSH SOCKS5 代理可能需要手动输入密码或配置免密登录才能持久运行。"
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||
log_info "内网主机现在应该可以自动通过 DHCP 获取 IP 并访问网络。"
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log_info "----------------------------------------------------------------------------------"
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