Git Push via ssh takes forever

In my home, when i run “git push” to gitlab.com via ssh, the process never ends.
Running wireshark i can see that several packages are being dropped.
When I try to run the same command over the mobile network, it works normally.

Can anybody help me? Gitlab banned the IP range of my ISP?

“git push” via https works normally. My only problem is with git push via ssh.