Git issues behind firewall(?)

[Boldunum]

Yeah so basically I've tried gitlab and bitbucket. Works great on my pc. But I got a dedicated server that presumably has firewall rules set and the authentication keeps failing. I googled the issue , and have followed what other people do but no go. Still having the same problem ... so figured to post here maybe someone can help me out.

This is drving me crazy right now as there is no documentation on this.

The OS is Windows Server 2012R

Thanks.