I have exactly the same problem as described here: http://stackoverflow.com/questions/12849986/connection-timeout-when-accessing-github

So I'll just copy & paste:

I have some weird problems. When I try to log in my Github account, I get a "net::ERR_EMPTY_RESPONSE" error.

I tried with Chrome, Firefox and Opera. In Firefox, if a clean the cache and offline data, it works for a while. Then I can log in, but I still can't create a Github repository, even if I clear the cache again.

My friend, in the same network, with Windows, can do whatever he wants on Github's web site, but I can't. I tried many DNS servers, I tried not to set it (my friend doesn't), but it's still not working.

My OS: Ubuntu x64 12.04

Ideas, please. And thanks.

Also, I can clone any repo but I can't push. I had to change to https://codeplane.com/ due to this problem, but I want to understand why it happens.

EDIT: I could clone one repo, but the other one just hangs at this point:

felipelalli@felipelalli-Studio-XPS-8100:~/wa$ git clone [email protected]:felipelalli/micaroni.git
Cloning into 'micaroni'...
remote: Counting objects: 5238, done.
remote: Compressing objects: 100% (3257/3257), done.
Receiving objects:  92% (4839/5238), 43.29 MiB | 902 KiB/s