From: "John A. Sullivan III" <jsullivan@opensourcedevel.com>
To: Derick Anderson <danderson@vikus.com>
Cc: netfilter@lists.netfilter.org
Subject: RE: ICMP types to allow
Date: Wed, 21 Dec 2005 13:48:48 -0500 [thread overview]
Message-ID: <1135190928.31139.37.camel@localhost> (raw)
In-Reply-To: <FAC4E024BF776842876169173CE2F01313B722@mailbox.vikus.com>
On Wed, 2005-12-21 at 13:36 -0500, Derick Anderson wrote:
> After reading the ICMP state machine section of the Netfilter tutorial
> [http://iptables-tutorial.frozentux.net/iptables-tutorial.html#ICMPCONNE
> CTIONS] it appears that ICMP traffic related to existing TCP and UDP
> connections falls under the RELATED,ESTABLISHED rules.
>
> So someone correct me if I'm wrong, but this means that any valid ICMP
> error message would get picked up by a '-A FORWARD -m state --state
> RELATED,ESTABLISHED -j ACCEPT' at the start of the chain, and so (as
> lst_hoe01 stated) allowing type 8 is all you really need to do, correct?
> (and a little reading goes a long way... =)
>
> Thanks,
>
> Derick Anderson
>
>
Somewhere I recall Microsoft documentation asking that all ICMP traffic
be allowed for Active Directory. I never bothered to find out what
exactly was needed and why. Does anyone know if a properly functioning
Active Directory needs anything other than echo? - John
--
John A. Sullivan III
Open Source Development Corporation
+1 207-985-7880
jsullivan@opensourcedevel.com
If you would like to participate in the development of an open source
enterprise class network security management system, please visit
http://iscs.sourceforge.net
next prev parent reply other threads:[~2005-12-21 18:48 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-21 18:36 ICMP types to allow Derick Anderson
2005-12-21 18:48 ` John A. Sullivan III [this message]
2005-12-22 0:29 ` René Pfeiffer
2005-12-22 2:08 ` Chris Brenton
2005-12-22 11:03 ` René Pfeiffer
2005-12-22 8:50 ` lst_hoe01
-- strict thread matches above, loose matches on Subject: below --
2005-12-21 19:12 Derick Anderson
2005-12-21 16:31 Peter E. Fry
2005-12-21 13:45 Derick Anderson
2005-12-21 14:16 ` lst_hoe01
2005-12-21 16:27 ` Georgi Alexandrov
2005-12-21 19:22 ` Cedric Blancher
2005-12-21 22:01 ` Chris Brenton
2005-12-22 0:32 ` René Pfeiffer
2006-01-03 7:33 ` Jan Engelhardt
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