The outage has been resolved.

On Mon, Dec 4, 2023, 6:55 PM Dan Mick <dmick@redhat.com> wrote:
We're experiencing network problems to the community lab (sepia) today
again.  There's been another cable cut.  Teams from our upstream
internet provider are working on the issue; however, some inbound and
outbound connections are affected and just don't work.

We're at the mercy of the provider's infrastructure.  I'll let this list
know when the problem gets fully resolved.