Git over SSH for Bitbucket Data Center — the port in every ssh://git@host:7999/ clone URL.
IANA registers 7999 as irdmi2, a name almost nobody uses. What actually listens here is Bitbucket's embedded SSH server: Atlassian's own Helm chart and Docker instructions default bitbucket.ports.ssh to 7999, which is why Bitbucket clone URLs carry the port explicitly while the web UI sits on 7990. It is a normal SSH server implemented in Java, speaking only the Git commands, not a shell.
Fine to expose
Public Git-over-SSH is the intended deployment: it is public-key only, and the SSH server exposes Git upload/receive-pack rather than a login shell. Pair it with the usual SSH hygiene and keep the 7990 web port behind whatever fronts it.
$ ssh -p 7999 -o BatchMode=yes git@TARGETSeen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.