Great Circle Associates Firewalls
(March 1996)
 

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Subject: 4 times:Re: IP fragments and packet filters
From: "massimo.cotrozzi" <massimo . cotrozzi @ ArthurAndersen . com>
Date: 6 Mar 96 10:36:10
To: firewalls <firewalls @ greatcircle . com>

I've received the following message ( and a couple of other more )
 for at least 4 times.
Is there anything wrong with the mailing list or is it my router?

To: cbk @ starbase.ingress.com ("charles b. kaplan")  @ internet
cc: firewalls @ greatcircle.com  @ internet (bcc: Massimo Cotrozzi)
From: Bill_Conaway @ iongate.staff.ichange.com (Bill Conaway) @ internet
Date: 01/03/96 15.37
Subject: Re: IP fragments and packet filters

Charles B. Kaplan wrote:
> 
> >The only time you're ever likely to see a packet with FO=1 is if a bad guy is
> >knocking at your door.
> 
> Would there ever be exceptions to this that would stem from the passing of
> data long distance, and thus forcing the data into a bigger pipe (say an ATM
> link cross country), and then back out of the pipe, possible becoming
> fragmented.

See rfc1858, "Security Considerations for IP Fragment Filtering".

-- 
Eric V. Smith           | Some for renown on scraps of learning dote,
EricSmith @
 windsor .
 com   |  And think they grow immortal as they quote.
Windsor Software Corp   +----------------------------------+ Edward Young
http://www.windsor.com/   Windows NT, Unix, SQL Server     |  English poet




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