Found ports setting...but still cant video conference with ichat

Question

I was once able to use iChat to type back and forth and use video conference (i was borrowing my neighbors wireless connection). But since I got this siemens SE567 router, the video chat fails to connect. I can still chat by typing. I have set up port forwarding for the following ports (all UDP): 5060, 5190, 5297, 5298, 5353, 5678 and 16384-16403. Also, thanks to Kappy and Barney, I have allowed iChat to access the internet. I think these ports are for iChat. But are the same for the videos, or do I have to open other ports (may be for isight). please help. May be i didnt have to open those ports I did since I was always able to use iChat to type.

Answer 1

In the Mac Firewall setting it to Allow All is just that it allows all ports or rather all apps to use any port they want.
In the routing device it tends to be different and somewhat different depending on the device.
A routing device will need to open the ports above 1024 in some manner (UPnP, Port Forwarding, Port Triggering or DMZ).
With some the firewall if it has a software version as well will be effective on those ports and will allow traffic.
On other devices the ports that are to be firewalled also need to be set.
Next comes what does the firewall actually do.
This for example is based on Levels
It includes at different stages things like Not Responding to Internet Pings, Intrusion detection, DOS and SPI but couches them in none threatening (friendly) terms that can be seen as being less informative.
On some devices the DOS or SPI (Some have both but must have one or the other) and Responding to Internet Pings can be separate features making you wonder what the actual firewall is doing.
This 3com emulator page makes it clear what the firewall here does and links the things that are going to be affected by it under it as sub headings in the menu.
This Netgear one has Firewall place and in the WAN menu item has either SPI or DOS (depending of firmware version) and Ping Blocking in that menu item. The actual firewall just seems to allow All Outgoing connection and block incoming ones but does not actually say what it is protecting you from.
(I had one of these and only did the WAN page stuff)
The upshot is that in your case you may need to set the ports in Port Forwarding (NAPT on yours) and also set them in the firewall. But having said that if it has an Off setting it would seem it firewall the ports that are in use.
Now in addition some routing modem are SIP aware and expect any SIP data to go to a VoIP phone. In theses cases there is a special Binding of SIP to port 5060. I know that Thomson-Alcatel Speedtouch range does this and some Drayteks but I am not aware of any of the Siemens range doing it.
My Netgear DG834G had a firmware Update which added a SIP ALG
ALGs are Application Level Gateways and are supposed to help with those particular applications. I could not work out if the one in my Netgear did actually help or not so I turned it Off
At the bottom.
I can not see from the Port Forward pics that suggests that you have these either.
The Manual seems to be downloadable from here which may help
http://gigaset.siemens.com/shc/0,1935,hqen_0_141461_rArNrNrNrN_variation%253A-5_pageType%253AmanualsimagePos%253A0,00.html#content
10:09 PM Tuesday; July 8, 2008