1. ssh: connect to host github.com port 22: Connection refused

   It worked well before, however, all of a sudden, I got this error when I tried to push codes to github.com.

   Because the error is ssh-relevant, so first I generated a new ssh key and added it to github. However, the problem wasn’t solved.

   If this error can’t give me enough information, why not get more errors to find clues? So I tried git clone, and got error ssh: connect to host github.com port 22: Connection refused. I googled this error, and got the solution as below:

   The reason why we suddenly got this error might be 22 port is blocked by firewall, so try to connect 443 port of github. Execute ssh -T -p 443 git@ssh.github.com in Git Bash, then everything is fine for me!

Resources

1. Oh, shit! Git[https://ohshitgit.com/]