想看看ant-design源码，结果报下面这个错误

git clone git@github.com:ant-design/ant-design.git
正克隆到 'ant-design'...
Connection to 13.229.188.59 port 22 timed out
fatal:

然后执行ssh -T git@github.com

ssh -T git@github.com
Hi xxx! You've successfully authenticated,

出现了就是说明github认证是成功了的。
接着又克隆出现了

git clone git@github.com:ant-design/ant-design.git
正克隆到 'ant-design'...
mux_client_request_session: read from master failed:

错误，然后修改了
/etc/ssh/ssh_config
设置

Host *  
ServerAliveInterval 120

长久连接。