Linux下使用tun2socks进行两地网络连接


  之前写了一个关于内网回拨解决方案 , 主要是介绍在PPTP不好用的情况下,两地机房网络如何进行内网连接,该篇推荐使用的是badvpn, 但该仓库已经归档很久了。这篇介绍另一个工具 tun2socks 来替代badvpn

  关于为什么记录这个,可以翻看之前的文章内网回拨解决方案 , 本篇只记录相关的整合脚本。

  • /usr/local/bin/tun2socks-control
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    #!/usr/bin/bash
    ################################################# 
    #   author      0x5c0f 
    #   date        2023-04-27 
    #   email       mail@0x5c0f.cc 
    #   web         tools.0x5c0f.cc 
    #   version     1.2.0
    #   last update 2024-06-11
    #   descript    Use : ./tun2socks-control -h
    ################################################# 
    PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
    export PATH
    
    # Log level [debug|info|warning|error|silent] (default "info")
    LOG_LEVEL="${LOG_LEVEL:-info}"
    
    # proxy model
    PROXY_MODEL="${PROXY_MODEL}"
    
    # local dev
    LOCAL_NETWORK_DEV="${LOCAL_NETWORK_DEV:-eth0}"
    # tun dev
    TUN_NETWORK_DEV="${TUN_NETWORK_DEV:-tun1}"
    # tun ip prefix
    TUN_NETWORK_PREFIX="${TUN_NETWORK_PREFIX:-10.3.6}"
    # route ip
    TUN_ROUTE_IP=($(eval echo ${SOCKS_ROUTE}))
    
    _START() {
        ip tuntap add dev "${TUN_NETWORK_DEV}" mode tun
        ip addr add "${TUN_NETWORK_PREFIX}.1/24" dev "${TUN_NETWORK_DEV}"
        ip link set "${TUN_NETWORK_DEV}" up
        # add route
        for _ip in ${TUN_ROUTE_IP[@]}; do
            ip route add "${_ip}" via "${TUN_NETWORK_PREFIX}.2"
        done
        # start tun2socks (https://github.com/xjasonlyu/tun2socks.git)
        tun2socks -device ${TUN_NETWORK_DEV} -proxy ${PROXY_MODEL} -interface ${LOCAL_NETWORK_DEV} -loglevel ${LOG_LEVEL}
    }
    
    _STOP() {
        # delete route
        for _ip in ${TUN_ROUTE_IP[@]}; do
            ip route del "${_ip}" via "${TUN_NETWORK_PREFIX}.2"
        done
        # delete network dev
        ip link set "${TUN_NETWORK_DEV}" down
        ip addr del "${TUN_NETWORK_PREFIX}.1/24" dev "${TUN_NETWORK_DEV}"
        ip tuntap del dev "${TUN_NETWORK_DEV}" mode tun
    }
    
    main() {
        case "$1" in
        "start")
            _START
            ;;
        "stop")
            _STOP
            ;;
        *)
            echo "$0 start|stop"
            ;;
        esac
    
    }
    main $@
    
  • /etc/sysconfig/tun2socks
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    ## tun2socks 日志级别 [debug|info|warning|error|silent] (default "info")
    LOG_LEVEL="info"
    
    ## https://github.com/xjasonlyu/tun2socks/wiki/Proxy-Models
    # <此项必填> 
    PROXY_MODEL="socks5://127.0.0.1:1083"
    
    ## 本地网络设备接口 (default: eth0)
    LOCAL_NETWORK_DEV="eth0"
    
    # tun 设备名(default: tun1)
    TUN_NETWORK_DEV="tun3"
    # tun 绑定的网段 (default: 10.3.6.0/24)
    TUN_NETWORK_PREFIX="10.3.6"
    
    # 只支持ipv4 
    ROUTE_HOST=""
    
    # 支持配置多个 空格隔开   
    SOCKS_ROUTE="${ROUTE_HOST}"
    
  • /etc/systemd/system/tun2socks.service
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    [Unit]
    Description=tun2socks https://github.com/xjasonlyu/tun2socks.git
    After=network.target
    # Requires=socketssh-tun.service
    
    [Service]
    Type=simple
    EnvironmentFile=/etc/sysconfig/tun2socks
    PIDFile=/run/tun2socks.pid
    ExecStart=/usr/local/bin/tun2socks-control start
    ExecStopPost=/usr/local/bin/tun2socks-control stop
    
    [Install]
    WantedBy=multi-user.target
    
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$> sudo systemctl daemon-reload 
$> sudo systemctl start tun2socks.service