I have a demo installation of Zentyal in a VM, with passthrough access to my main network (no nat).
Configuration page works fine (default port) and I have configured more or less things as they would be in production.
Only thing not working properly yet (on purpose) is DNS (active but... nobody accesses it) and DHCP (inactive) as Zentyal is in a network with other active DNS and DHCP (and different domain).
Jabber service for some reason drops.
It does say that it writes to some log (which btw should be accessible from web console), but I haven't yet ssh to the server to read it.
Question is, any "common" reason the jabber service fails in a new server?