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Date: Sun, 7 Jul 2002 11:31:26 +0100
From: Matthew Seaman <m.seaman@infracaninophile.co.uk>
To: Irwan Hadi <irwanhadi@phxby.engr.usu.edu>
Cc: questions@FreeBSD.ORG
Subject: Re: pullup failed
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On Sat, Jul 06, 2002 at 10:42:55PM -0600, Irwan Hadi wrote:

> pullup failed

ipfw(8) man page:

FINE POINTS
     =B7   There are circumstances where fragmented datagrams are unconditi=
on=AD
         ally dropped.  TCP packets are dropped if they do not contain at
         least 20 bytes of TCP header, UDP packets are dropped if they do n=
ot
         contain a full 8 byte UDP header, and ICMP packets are dropped if
         they do not contain 4 bytes of ICMP header, enough to specify the
         ICMP type, code, and checksum.  These packets are simply logged as
         ``pullup failed'' since there may not be enough good data in the
         packet to produce a meaningful log entry.

Fragmented packets like that are probably due to broken hardware on
your network, although they can be the result of enemy action.

	Cheers,

	Matthew

--=20
Dr Matthew J Seaman MA, D.Phil.                       26 The Paddocks
                                                      Savill Way
Tel: +44 1628 476614                                  Marlow
Fax: +44 0870 0522645                                 Bucks., SL7 1TH UK

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