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kernel: NAT: 0 dropping untracked packet c1aa2300 1 10.20.30.132 -> 62.142.131.12



Hello,

I have the following problem. A few days before I compiled my 2.4.2 kernel
with support for NAT in order to get a computer of a friend of mine
connected to the internet (we had to masquerade his computer since my ISP
has fixed the internet connection to the MAC address of my network card,
but that's an other story). The whole thing went ok, but there is one
thing which puzzles me.

>From the begining I got ever once in a while a message of the following
type in my logs:

Mar 31 13:50:17 seneca kernel: NAT: 0 dropping untracked packet c1ecc980 1
10.20.30.132 -> 62.142.131.12

Ok, that might happen I thought (and I am anything else but a expert in
this NAT stuff, so I realy don't know, what this message means, but as
long as it happend only seldom I didn't care much about it). But yesterday
the appareance of these messages started to increase and today its realy
anoying. So I'm realy wondering, what's going on here? Especialy offten
the source address 10.20.30.132 is mentioned, once in a while (but
seldom) there are other addresses outside the local network, for example
169.254.27.17 (About my network: My IP is 62.142.131.26, the gateway is
62.142.131.1)

I've attached the gnuziped part of kern.log from the last reboot on (45
min containing about 300 messages). Perhaps somebody has a clue, what is
going on here in the network?

Thank you in advance,
Martin

Attachment: kern.log.gz
Description: Binary data


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