Github (SSH) via public WIFI, port 22 blocked

The same works for Bitbucket:

Host bitbucket.org
  Hostname  altssh.bitbucket.org
  Port  443

via (outdated / dead)

via, updated (2015-10-29)

Try this:

$ vim ~/.ssh/config

Add

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

Source: https://help.github.com/articles/using-ssh-over-the-https-port

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