Date: Thu, 08 Jun 2000 17:17:02 -0600 From: Wes Peters <wes@softweyr.com> To: Dave Preece <dave.preece@kbgroup.co.nz> Cc: "Kenneth D. Merry" <ken@kdm.org>, freebsd-hackers@FreeBSD.ORG Subject: Re: Path MTU discovery. Message-ID: <3940296E.D499F88E@softweyr.com> References: <67B808B0DD93D211ABEE0000B498356B02BC71@internet.kbgroup.co.nz>
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Dave Preece wrote:
>
> > > Just learning about this: I can see the advantages but does
> > anything use it?
> >
> > Sure, TCP uses it.
> >
> > TCP (at least in FreeBSD) sets the "don't frag" bit on all
> > its outgoing
> > packets.
>
> Good lord, so it does. Mental note, packet sniff before posting in future.
>
> So... thinking about what this means for firewalls and natd. If we block all
> incoming ICMP's across the firewall
That's a no-no.
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
wes@softweyr.com http://softweyr.com/
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