From: "Mark E. Donaldson" <markee@bandwidthco.com>
To: 'Kiran Kumar' <immidi_kiran@yahoo.com>,
'Netfilter Mailing List' <netfilter@lists.netfilter.org>
Subject: RE: ICMP Rule Problem
Date: Tue, 3 Feb 2004 21:50:41 -0800 [thread overview]
Message-ID: <200402040550.i145ocrB027043@server5.bandwidthco.com> (raw)
In-Reply-To: <20040203132411.96455.qmail@web14004.mail.yahoo.com>
The answer lies within RFC 1122 which states "that an ICMP error message
should not be sent as the result of receiving another ICMP error message."
However, An ICMP message can be sent in response to an ICMP query message,
which is what an echo request is, and is the source of the question that
started this thread.
-----Original Message-----
From: netfilter-admin@lists.netfilter.org
[mailto:netfilter-admin@lists.netfilter.org] On Behalf Of Kiran Kumar
Sent: Tuesday, February 03, 2004 5:24 AM
To: Netfilter Mailing List
Subject: Re: ICMP Rule Problem
--- Antony Stone <Antony@Soft-Solutions.co.uk> wrote:
> Never mind that, you're not allowed to respond to ICMP packets with
> ICMP errors.
>
> See RFC792 page 1.
Wrong. You are not allowed to respond to ICMP _errors_ with ICMP errors,
what else does ping mean by giving error messages like "Destination Host
Unreachable" ?.
=====
Regards,
Kiran Kumar Immidi
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next prev parent reply other threads:[~2004-02-04 5:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-03 9:17 ICMP Rule Problem Antony Stone
2004-02-03 13:24 ` Kiran Kumar
2004-02-03 13:49 ` Antony Stone
2004-02-03 15:20 ` Maciej Soltysiak
2004-02-04 5:50 ` Mark E. Donaldson [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-02-02 17:02 David C. Hart
[not found] ` <200402021211.06028.Alistair Tonner <>
2004-02-02 17:16 ` David C. Hart
2004-02-02 19:38 ` Unknown, Alistair Tonner
2004-02-03 6:36 ` Mark E. Donaldson
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