Re: TCP header length exceeds packet length

[Phil Wood <cpw () lanl gov>]

If extol is getting the tcp off the wire then they probably need to know
the mtu of your interface so you can set the snapshot length.

If extol is reading a file you prepared, then it was probably read with
a snaplen less than the maximum mtu of your interface.

Or, finally it might just be a corrupt packet.  You should do a full
packet capture of the offending pc spew with probably something like:

  tcpdump -i <interface> -s 1514 ... -w pc.pcap host pc

on the assumption that your using an ethernet interface for packet
capture.

On Mon, Nov 03, 2003 at 03:38:55PM +0100, Erik Nyman wrote:
> Hi!
>
> I'm testing a tool built by extol
> (http://www.extol.com.my/news/warning/other/blaster_detection.htm) but I get
> this warning message that I don't understand.
>
> WARNING: TCP Header length exceeds packet length!
>
> I have searched for an explanation, but I can't find any.
>
> Anyone that can explain what to do about the PC that sends these packets?
>
> /Erik
>
>
>
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-- 
Phil Wood (cpw_at_lanl.gov)


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