Need Tech help look at Screen Shot (Random UDP Ports)

from Demigod Forums

So in order to get to the bottom of my connection problems (being able to connect to some people but not everyone) I took a screen shot of my router log.

 

I made sure everything was turned off besides my computer and my server (which i was using to access the router) Then I attempted to join 2 games. Each time there was a person that I could not connect too you can see that they were trying to connect on some random UDP port (check circled log entry). If a tech could please take a look at this and offer some insight on how I can resolve this issue it would be greatly appriciated :)

 

Thanks

Bart.

 

Blocked UDP Ports

1,476 views 4 replies
Reply #1 from Demigod Forums Top

Some NAT not only map the internal IP-address to an external one, but they also map the internal port to a different external port (e.g. 6112 becomes 54822). Your router seems to be of the most nasty kind and maps to an unpredictable port, meaning the NAT faciliator cannot arrange a NAT punchthrough. If in your router options you can change the NAT mode, switch to "endpoint-independent mapping", "full-cone" or "gaming mode".

If you want to further understand these different ways a NAT can operate, Cisco has an article on NAT anatomy

Reply #2 from Demigod Forums Top

i had the same logs as you, i fixed it by changing firewall rules.

this is what my router log looked like when the random ports where occuring

Friday April 17, 2009 19:33:44 Unrecognized attempt blocked from 59.113.164.120:25082 to [my WAN IP] UDP:48954
Friday April 17, 2009 19:34:25 TX TCP reset for 192.168.0.2(1977) -> 192.168.0.1(80)
Friday April 17, 2009 19:34:25 TX TCP reset for 192.168.0.2(1978) -> 192.168.0.1(80)
Friday April 17, 2009 19:34:58 Unrecognized attempt blocked from 119.117.108.210:19450 to [my WAN IP] UDP:48954

unfortunately i dont know if you have the same settings on you router, hope this helps.

note: after i did this firewall configuration the random port messages were gone from the router log.

 

 

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Reply #3 from Demigod Forums Top

Thanks for the responses I'll go through the router options again when I get home and ill hopefully post with some positive results.

Stack3d thanks for the SS, but it looks like ive done exactly that already... allowed all wan traffic on ports 6100-6200 to go to my internal IP address, the problem has been that its been trying to forward one some insane ports so I believe it might be the NAT thing which I will look into deepr :)

Reply #4 from Demigod Forums Top

but it looks like ive done exactly that already
End of quote

ok well have you tried putting your PC in the DMZ? that may work..