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Date:      Tue, 9 Jun 1998 09:01:08 -0400 (EDT)
From:      Snob Art Genre <benedict@echonyc.com>
To:        Tom Torrance <freebsd@tomqnx.com>
Cc:        hackers@FreeBSD.ORG
Subject:   Re: IPFW problem?
Message-ID:  <Pine.GSO.3.96.980609085936.10243C-100000@echonyc.com>
In-Reply-To: <m0yjJW2-00087JC@TomQNX.tomqnx.com>

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On Tue, 9 Jun 1998, Tom Torrance wrote:

> The sample file to the contrary, it appears that ipfw will not
> allow the "established" keyword for the "allow icmp" case.
> 
> Is this a misunderstanding on my part or a genuine fault"?

'Established' matches on the ACK bit to make sure a packet is part of an
established connection, right?  It's a misunderstanding: ICMP is
connectionless.
 
> Is there another way to allow ICMP only as part of the TCP protocol?

I'm not sure I understand this.  ICMP is logically at the same level as
TCP, it goes over IP.


 Ben

"You have your mind on computers, it seems." 


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