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Date:      Fri, 14 Nov 2008 15:17:45 +0000
From:      Vincent Hoffman <vince@unsane.co.uk>
To:        Gary Hartl <ghartl@gmail.com>
Cc:        FreeBSD Questions <freebsd-questions@freebsd.org>
Subject:   Re: inet hosts question
Message-ID:  <491D9699.5000103@unsane.co.uk>
In-Reply-To: <000001c94666$5eb02360$1c106a20$@com>
References:  <000001c94666$5eb02360$1c106a20$@com>

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Gary Hartl wrote:
> Hi all;
>
> I have a quick question, I am trying to block a range of ip's for the sake
> of example they are 192.168.0.0 - 192.168.255.255
> For the life of me I can't remember how to do that.
>
>   
What mechanism? null route, ipfw, ipf or pf
> I thought I could do it by using the /class ie /32 for class c but i can't
> remember what the class delegation is for that size of pool, I think it is a
> class B.
>   
192.168.0.0/16 for your example.
and yes this is a class B (not all /16s are though.)

the /x notation is called CIDR (classless interdomain routing.)
http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

Vince
> All help would be appreciated.
>
> Cheers, 
>
> Gary 
>
>
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