使用autossh建立SSH通道，实现本地socks代理，系统需安装autossh（如果是OSX，还需要安装watch）。

autossh.sh

# MacOSX-Kits: https://github.com/JinnLynn/MacOSX-Kits/blob/master/shell/inc/ssh.sh

JPROXY_SERVER_USR="YOUR SSH SERVER USERNAME"
JPROXY_SERVER="YOUR SSH SERVER"
JPROXY_SERVER_KEY="YOUR SSH KEY FILEPATH"
JPROXY_SOCKS_PORT="9527"

# 输出检查结果字符串
# 使用方法: 判断语句; _kits_check "说明文字"
# 如: [[ 0 -eq 0 ]]; _kits_check "0=0?"
function _kits_check() {
    ret=$?
    ok="\033[32m✔\033[39m"
    fail="\033[31m✘\033[39m"
    for (( i = 0; i < 40; i++ )); do echo -n " "; done
    [[ $ret -eq 0 ]] && echo -en "$ok" || echo -en "$fail"
    [[ ! -z "$1" ]] && echo -e "\r$1"
}

# ssh代理
function kits_ssh_proxy() {
    mp="55000"
    case "$1" in
        "start" | "restart" )
            kits_ssh_proxy stop
            autossh -M $mp -f -N -D $JPROXY_SOCKS_PORT -i "$JPROXY_SERVER_KEY" $JPROXY_SERVER_USR@$JPROXY_SERVER
            ;;
        "stop" )
            # 杀死SSH进程
            for p in `ps aux | grep ssh | grep $mp:127.0.0.1:$mp | awk '{print $2}'`; do 
                [[ ! -z "$p" ]] && kill -9 $p
            done
            # 如果SSH没有成功连接, 前述的进程将不存在，需手动杀死autossh进程
            for p in `ps aux | grep autossh | grep $mp | awk '{print $2}'`; do 
                [[ ! -z "$p" ]] && kill -9 $p
            done
            ;;
        "alive" )
            # 查找autossh进程
            ret=`ps aux | grep autossh | grep -c $mp`
            [[ $ret -gt 0 ]]; _kits_check "autossh"
            ret=`lsof -i:$JPROXY_SOCKS_PORT`
            [[ ! -z "$ret" ]]; _kits_check "SOCKS[127.0.0.1:$JPROXY_SOCKS_PORT]"
            ;;
        "watch" )
            watch -n 1 "lsof -i:$JPROXY_SOCKS_PORT"
            ;;
        * )
            ;;
    esac
}