From owner-freebsd-net@FreeBSD.ORG  Thu Jul 13 18:59:37 2006
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Date: Thu, 13 Jul 2006 21:59:25 +0300 (EEST)
From: Dmitry Pryanishnikov <dmitry@atlantis.dp.ua>
To: Brian Candler <B.Candler@pobox.com>
In-Reply-To: <20060713214311.T73434@atlantis.atlantis.dp.ua>
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Cc: freebsd-net@freebsd.org, Ensel Sharon <user@dhp.com>
Subject: Re: counting (not) blocks of IPs in ipfw - please help
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On Thu, 13 Jul 2006, Dmitry Pryanishnikov wrote:
>> # ipfw add 00100 count ip from { not 10.20.0.0/16 and not 10.30.0.0/16 } to
>>    any via fxp0 in
>> ipfw: missing ")"
>
> Correct, there is no 'and' keyword in ipfw syntax, since it's redundant:
> a simple ',' in address list means 'and'. So this can be written as:

  Umm, sorry, of course ',' means 'or':

 	10.20.0.0/16,10.30.0.0/16 matches 10.20.0.0/16 OR 10.30.0.0/16

> ipfw add 100 count ip from not 10.20.0.0/16,10.30.0.0/16 to any via fxp0 in

  Yet this construction is correct and means exactly that: packets NOT
from ( 10.20.0.0/16 OR 10.30.0.0/16).


Sincerely, Dmitry
-- 
Atlantis ISP, System Administrator
e-mail:  dmitry@atlantis.dp.ua
nic-hdl: LYNX-RIPE