title: Git access on Heroku deployment and others: connection refused
body: <p>I have suddenly run into an issue using git.</p>
  
  <p>I created a new app, went to push to Heroku and now see:</p>
  
  <pre><code>ssh: connect to host heroku.com port 22: Connection refused
  </code></pre>
  
  <p>My other previously working Heroku apps no longer work, receiving the same error.
  Other Heroku commands work (create, info, db:push).</p>
  
  <p>I also see the error when accessing Git on my unfuddle accounts. </p>
  
  <p>I can SSH to other services, so it doesn't look like it's my machine.</p>
  
  <p>Any ideas?</p>