github.com port 22: Connection timed out

• • 背景
  • 解决方案
  • 参考

• 今天突然用ssh方式 pull GitHub的项目报github.com port 22: Connection timed out

 $ git clone git@github.com:1030907690/dayAndNightAndroidCustomServerPy.git
Cloning into 'dayAndNightAndroidCustomServerPy'...
ssh: connect to host github.com port 22: Connection timed out
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

• 这个大概是公司网络把访问出去22端口给屏蔽了，我telnet也不通。

• GitHub允许使用443端口，下面改成走443端口。
• 先检查走443端口能否行得通。

ssh -T -p 443 git@ssh.github.com

• 确认有successful提示，如下。

 The authenticity of host '[ssh.github.com]:443 ([20.205.243.160]:443)' can't be established.
ED25519 key fingerprint is SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '[ssh.github.com]:443' (ED25519) to the list of known hosts.
Hi 1030907690! You've successfully authenticated, but GitHub does not provide shell access.

• 确认可以，下一步编辑文件

vim ~/.ssh/config

• 加入以下代码

Host github.com
Hostname ssh.github.com
Port 443

• 测试是否成功ssh -T git@github.com，如下所示
  

• 然后拉取项目就可以了，如下所示
  

• https://segmentfault.com/a/1190000040896781
• https://www.jianshu.com/p/c3aac5024877