Mac系统推荐使用以下协议:
      IPSec or L2TP: 配置简单。
      SSH Socks Tunnel: 稳定,只限网页访问。
    
        接口: VPN
        VPN类型: 'Cisco IPSec' (Recommended) or 'L2TP over IPSec'
        服务器地址: sanpingshui.com
        帐户名称: [Your account or guest account]
        密码: [Your password or guest password]
        共享的密钥(Shared Secret): petersvpn
        组别名称(Group Name): <空> (Empty)
          其它: 默认
      
        注意:L2TP必须在高级选项里勾选"通过VPN连接发送所有通信"。
        
      
        SERVER_IP: sanpingshui.com
        SSH USER: vpn
        SSH key file: [your key file], e.g. this file vpn.pem
      
      Open
          Terminal(终端) in Mac,
      and type the following command to setup the SSH tunnel: 
      ssh -D 9090 [USER]@[SERVER_IP] -i [Path of your SSH key file]
      
      eg:
      ssh -D 9090 vpn@sanpingshui.com -i /home/david/vpn.pem
      
      or if you run the command in the folder containing the SSH key file:
      ssh -D 9090 vpn@sanpingshui.com -i ./vpn.pem
      
      
      
      If the ssh command is successful, you will see a welcome message like below.
      
      ... 
      
      *** Welcome! You can configure your browser to use Socks Tunnel now. *** 
      vpn@ip-172-26-1-210:~$ 
      
      If you face any permission issue with the SSH key file while running the above command, 
      run the command below:
      chmod 600 [Path of your SSH key file]
    
请参考 这里。注意配置中端口是上面的9090。
下载Firefox火狐,打开设置->网络设置,选择手工配置代理如下:
        
        
        
        