Cannot connect to gitlab.com: Connection refused

With my vServer I cannot connect to gitlab.com at all. From my local machine everything works as usual.

I tried several things:

$ ping gitlab.com
PING gitlab.com (35.231.145.151) 56(84) bytes of data.
From phase-engine.com (195.128.100.217) icmp_seq=1 Destination Port Unreachable
ping: sendmsg: Operation not permitted
$ ssh -T git@gitlab.com
ssh: connect to host gitlab.com port 22: Connection refused
$ curl gitlab.com
curl: (7) Failed to connect to gitlab.com port 80: Connection refused
$ curl https://gitlab.com
curl: (7) Failed to connect to gitlab.com port 443: Connection refused
$ curl http://gitlab.com:443
curl: (7) Failed to connect to gitlab.com port 443: Connection refused

Is there any chance that my server got blacklisted somehow?

As it’s still not working, we dropped gitlab in favor of gitea.