up)
   export MODE="start"
   export PHASE="post-up"
        #add start
   nmcli con up id 连接名称 #连接后自动连接VPN
        #add end
   exec run-parts /etc/network/if-up.d
   ;;
    vpn-up)
   export MODE="start"
   export PHASE="post-up"
   exec run-parts /etc/network/if-up.d
   ;;
    down)
   export MODE="stop"
   export PHASE="post-down"
   exec run-parts /etc/network/if-post-down.d
   ;;   
    vpn-down)
   export MODE="stop"
   export PHASE="post-down"
   exec run-parts /etc/network/if-post-down.d
   ;;

        password-flags=0 #0密码保存到networkmanager，1密码保存到用户钥匙环，2不保存密码，4不需要密码
        [vpn-secrets]
        password=密码