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Date: Fri, 6 Feb 2004 10:13:26 -0800
From: Luigi Rizzo <rizzo@icir.org>
To: Don Bowman <don@sandvine.com>
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In-Reply-To: <FE045D4D9F7AED4CBFF1B3B813C85337045D7EEA@mail.sandvine.com>;
	from don@sandvine.com on Fri, Feb 06, 2004 at 01:09:48PM -0500
cc: "'Jack L. Stone'" <jacks@sage-american.com>
cc: freebsd-ipfw@freebsd.org
Subject: Re: Syntax to block 38 IPs
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On Fri, Feb 06, 2004 at 01:09:48PM -0500, Don Bowman wrote:
...
> deny ip from { 209.102.202.131, 209.102.202.132, ...} to any 

this is still inefficient. Better to use

	deny ip from 209.102.202.0/24{131,132,157,190,1,86} ...

which uses a bitmap to represent the list of hosts and has constant
processing time as opposed to having to scan a list.

	cheers
	luigi

> this uses IPFW2 I think.
> 
> from the shell, remember to escape the { as \{.
> 
> you could also send a RST i suppose, but just dropping it is
> best.
> 
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