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Bug in Apple Airport support of NAT-PMP with UDP

 
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lowerpower



Joined: 01 Oct 2007
Posts: 8
PostPosted: Sat Mar 07, 2009 5:38 am    Post subject: Bug in Apple Airport support of NAT-PMP with UDP Reply with quote
FYI, I found a bug, or at least what I see as a bug in the post mapped handling of UDP traffic in the Apple Airport router.

For example, If I map port 1111 with NAT-PMP to the same port on an internal machine, if I send traffic to the external IP address at that port it gets sent to my internal port, which is what I expect.

But If I generate traffic with a source port of 1111 on that mapped internal machine, the port doesn't leave the router on port 1111 but on some typical NAT port.

I think this can cause problems with some peers that are on port restricted or Symmetric NATS.

So be aware of this problem.

-lp
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