are you sure
port 9418 (tcp) is allowed for outbound connections?
Funny, while I was bringing my kids to school in the morning, suddenly
it came up in my mind that our company's firewall blocks almost all
ports to the outside world, except port 80 and a few others. I totally
forgot that, sorry :)
You can go to repo.or.cz and ask them to clone the OpenBSC git repository and
then clone using http.
z.