HI
Ports 80 and 443 should be open in most routers anyway.
I cannot say I have seen a Table where there can be multiple Trigger Ports.
If you are using iChat 3 then it can be written this was.
Trigger 5678 (UDP only) as this is the Visible Invite and Start of A/V stuff
Incoming ports are then 5060 (if iChat 3) then the group (16384-16403 for iChat 3) 16393-16402 (Smaller group but inside the iChat 3 ones)
Text Chatting in AIM is on port 5190 TCP by default in iChat versions prior to 6 as is the Login.
If you Change the Login port (to 443) then the Text chat moves
File Sharing on AIM needs port 5190 on UDP
I would tend to heave the Login Port trigger the File Sharing port.
As you can set up the Jabber one the way you have I would not alter it.
As already stated I am not seeing this here in the UK (I get pushed to a UK Yahoo Server)
I am also using UPnP in my router.
10:15 PM Monday; January 9, 2012
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
iMac 2.5Ghz 5i 2011 (Lion 10.7.2)
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Mac OS X (10.6.8),
"Limit the Logs to the Bits above Binary Images." No, Seriously