full-disclosure - Re: (ICMP attacks against TCP) (was Re: HPSBUX01137 SSRT5954

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Message-ID: <200507211717.j6LHHFDk001899@vaticaan.Holland.Sun.COM>
Date: Thu Jul 21 18:33:48 2005
From: Casper.Dik at Sun.COM (Casper.Dik@....COM)
Subject: Re: (ICMP attacks against TCP) (was Re:
	HPSBUX01137 SSRT5954 


>> There are still some radio links with MTUs of 296 bytes.
>
>Go search with google....people still actively use smaller MTUs.
>
>What do you do?  Where do you draw the line in the sand?

Well, the minimum requirement for "you must be able to reassemble this"
is 576; so you use PMTU until you go as low as 576 at which point you
stop using the DF bit.

Casper