Git access on Heroku deployment and others: connection refused

I have suddenly run into an issue using git.

I created a new app, went to push to Heroku and now see:

ssh: connect to host heroku.com port 22: Connection refused

My other previously working Heroku apps no longer work, receiving the same error. Other Heroku commands work (create, info, db:push).

I also see the error when accessing Git on my unfuddle accounts.

I can SSH to other services, so it doesn't look like it's m开发者_StackOverflow中文版y machine.

Any ideas?

Perhaps the comments here might help. Matt H. suffered the same problem of connection refused errors when connecting to heroku.com, because he was running PeerGuardian. Heroku's staff say that "Most of the time, we find users who have software that is blocking ec2/amazon."

I rebooted and problem solved.