we have a customer where we have 2 VLANs. In VLAN 1 we have the myPBX "Server" and in the other VLAN we have the PCs with the myPBX Software. In the firewall we have TCP / UDP Ports 0(any) get free for the other VLAN. The myPBX software have a connection to the "Server" but in the history always stand load. Which ports or protocols we must stand on free for the other VLAN.
Here a picture in German what I mean:
Can anyone help me?
Sorry for my Englisch.