This is probably a blindingly obvious question, but I'm a little stumped. I've done a little work for local business, setting up a Linux server (Ubuntu), developing some code and pushing it to github. It's all worked wonderfully until a few weeks ago, when he had someone in to do something to the network. Since then, Things Are Broken in ways that I don't understand.

When I try to do anything with github, I see the response

  Received disconnect from 140.82.113.3 port 22:2: Connection blocked because server only allows public key authentication. Please contact your network administrator.

Because I was worried I'd borked my account, this afternoon I tried again, creating a brand-new account and ssh-ing in .. and still got the same result.

My github account works fine from my own machine, and also from my web provider (pair.com), so I'm guessing there's something going on within my client's network. Suggestions gratefully received.

Alex
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