title: Why my github connection stopped working without any change
body: <p>I had been using Github on my personal Mac and IntelliJ for long time.
  In fact, I run spring-boot config server also on local backed by Git repo on github, and all had been working fine .until today.
  Today suddenly, my local config server stopped working.
  I tried and not able to use IntelliJ to push code to Github</p>
  
  <p>So I tried using the terminal, but I've got the following error today. </p>
  
  <pre><code>MacBook-Pro ~ %  ssh -T -p 443 git@ssh.github.com
  The authenticity of host '[ssh.github.com]:443 ([192.30.253.123]:443)' can't be established.
  RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8.
  Are you sure you want to continue connecting (yes/no)? 
  Host key verification failed.
  </code></pre>
  
  <p>Until yesterday all was working fine. I was not even using the Terminal, I had been committing and pushing code through Intellij. But today everything is failing.</p>
  
  <p>I pressed yes in the above command. And got the following message</p>
  
  <pre><code>Warning: Permanently added '[ssh.github.com]:443,[192.30.253.123]:443' (RSA) to the list of known hosts.
  Hi xxxxxx! You've successfully authenticated, but GitHub does not provide shell access.
  </code></pre>
  
  <p>But I'm still not able to push or infect connect the GitHub.
  I checked the files in <code>~/.ssh</code> folder. Nothing was changed since December.
  I checked my Github Profile settings ssh key, nothing changed since December.</p>
  
  <p>But suddenly today everything stopped working.
  Any help is appreciated. </p>