Why do I get "unable to connect a socket" when I try to clone via a git URL?

Looks like there is a network problem because the git protocol, by default, uses the port 9418. Looks like your traffic is blocked on that port.

Uku Loskit is right about the port being blocked. The solution is to set up your remote's URL without using git://

I use: https://github.com/user/project.git or [email protected]:user/project.git