We have a GW cluster with a few postoffices. Our GMS is behind a
firewall but 7191 is open --> POA and 8191 is open --> GMS. It is only
open on the cluster resource port.
We do get 8908 when new mail arrives to GW.
We did a sniff, using pktscan, witch showed that the POA is trying to
send it's notification to GMS from the cluster host's ip address instead
of the resource ip address.
The POA's are set to "Bind exclusively to TCP/IP Address".

Is it nessesary to open 8191 from the cluster host's as well ?? Or is it
supposed to work anyway?

We use 7.0.3 Agents and GMS 2.0.3 for Linux.