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Date:      Tue, 17 Aug 1999 00:05:57 -0700 (PDT)
From:      Archie Cobbs <archie@whistle.com>
To:        geoffr@is.co.za (Geoff Rehmet)
Cc:        imp@village.org ('Warner Losh'), archie@whistle.com (Archie Cobbs), brian@CSUA.Berkeley.EDU, current@FreeBSD.ORG
Subject:   Re: Dropping connections without RST
Message-ID:  <199908170705.AAA02218@bubba.whistle.com>
In-Reply-To: <E3453EC6C52ED3118E7E0090275CD47CFFAFA7@isjhbex.is.co.za> from Geoff Rehmet at "Aug 17, 1999 08:55:23 am"

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Geoff Rehmet writes:
> > : Not that easily.. how are you going to make ipfw dynamically know
> > : which ports have listeners and which don't?
> > 
> > By filtering all RST packets?
> 
> My view was that this is much simpler than filtering packets -
> never generate the packet.  My guess is that it creates lower
> overheads.  In some instances, I don't want to look at every
> packet (which in effect happens with a packet filter).

Plus, packets with RST in them are used for other purposes besides
rejecting new incoming connections..

-Archie

___________________________________________________________________________
Archie Cobbs   *   Whistle Communications, Inc.  *   http://www.whistle.com


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