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 Message-ID: <20020707103126.GB20900@happy-idiot-talk.infracaninophi> In-Reply-To: <20020707044255.GA3260@phxby.com> References: <20020707044255.GA3260@phxby.com>
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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
· There are circumstances where fragmented datagrams are uncondition
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 not
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
--
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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