Mario Kart Wii.  There are definitely incoming ports on the high end.  
UDP 50000 and up.

Tim Kingman wrote:
> What games are you playing? I'm running 1.235 and have never set up 
> any forwarding to my Wii, and I don't have any problems "hosting" in 
> Mario Kart or Guitar Hero. I had assumed that the Wii connected to 
> Nintendo's WFC servers and all the communication happened there, 
> rather than the PC games style of having other players actually 
> connecting to your PC. When I have had problems, I would get 
> disconnected after a minute or two of a kart race, but we would see 
> similar issues regardless of who first opened the room.
>
> I guess I don't really have any useful suggestions or information 
> here. I'm sure there are other Wii owners on multiple firmware 
> versions to chime in. I have some spare hardware here and may try 
> installing 1.3 over the weekend to see if I get different results than 
> 1.2.
>
> -Tim
>
> On Dec 3, 2008, at 7:02 PM, Christopher M. Iarocci wrote:
>
>> I have a WII behind my m0n0wall at home.  I'm running 1.3B15.  I am 
>> unable to host a room on the WII.  I can connect to a hosted room 
>> without issue.  I found the ports used to host a game and port 
>> forwarded them to my WII.  However, even though they are not being 
>> blocked (checked the logs), the connection still does not happen.  
>> So, I dropped a Linksys in place, bam, hosting works fine.  So I did 
>> a bit more experimenting with the m0n0wall (borrowed a friend's WII 
>> and connected them both).  If I do a 1:1 NAT mapping to the WII from 
>> my outside IP and open the firewall ports, everything works fine.  If 
>> I simply port forward the ports and open the firewall, it will not 
>> work.  So my question here is, what is the major difference between 
>> port forwarding and 1:1, and is there a way to get around this 
>> problem?  I would love to leave the 1:1 in place, but unfortunately I 
>> only have a single IP and other services that run behind it that get 
>> broken when the 1:1 is in place.  Thanks for any help you can offer.
>>
>> Chris
>
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