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Re: skb_checksum_help

To: Thomas Graf <tgraf@xxxxxxx>
Subject: Re: skb_checksum_help
From: David Coulson <david@xxxxxxxxxxxxxxxx>
Date: Sun, 23 Jan 2005 20:31:02 -0500
Cc: netdev@xxxxxxxxxxx
In-reply-to: <20050124003241.GJ23931@xxxxxxxxxxxxxx>
References: <41F432BD.3000300@xxxxxxxxxxxxxxxx> <20050124003241.GJ23931@xxxxxxxxxxxxxx>
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Thomas Graf wrote:

Protocol: 17 (UDP)
Checksum: 0x7b08
Source: 211.32.117.11 (korean ip)
Destination: 10.1.1.5

[0] The originator of this packet is likely a BSD based
UNIX box. It is unlikely that it dropped to 49 from 128
which I think is the base TTL windows uses. Only guessing
though.

Looks like a DNS packet. AFAIK, 53 is the only UDP port I NAT through from the outside to 10.1.1.5. No idea if that really matters or not, with respect to the contents of the IP packet.

David

--
David J. Coulson
email: david@xxxxxxxxxxxxxxxx
web: http://www.davidcoulson.net/
phone: (216) 920-3100 / (216) 258-4942

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