Since the last update, my system didn’t show the web interface anymore. So I decided to do some debugging. SSH and other services seem to work fine - so I got into the box for some further investigation.
For some strange reason, the webserver is not listening on tcpv4
root@ucs:~# netstat -anpt | grep 443 tcp6 0 0 :::443 :::* LISTEN 994/apache2
Not sure what caused it, but configs are clean.