4psa Spam Guardian and firewall settings

[dopey]

Hi,

I have setting some firewall rules voor using Spam Guardian whit razor, DCC, pyzor.

I have set the follow firewall rules:
pyzor: 24441 udp in and out
DCC: 6277 udp in and out
Razor 2703 tcp only out
SpamAssassin: 783/tcp/udp closed
???: 722 tcp/udp closed

I have now 3 qeustions:

1. Whats running on port 722 ?

2. Is it normal that there is nothing listen on port 783 ?

3. Are my firewall settings good or do i have to add something ? or can i delete some firewall rules ?

Greets