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 From:  Chris Buechler <cbuechler at gmail dot com>
 To:  Allan Mogensen <allan at 1966 dot dk>
 Cc:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] DMZ and public ip problem
 Date:  Wed, 16 Mar 2005 13:50:09 -0500
On Wed, 16 Mar 2005 14:28:54 +0100, Allan Mogensen <allan at 1966 dot dk> wrote:
> Okay, i'm a bit confused how to set the DMZ interface ip... if i want to use
> the 83.90.91.241, would it then be 83.90.91.241/31 or ??
> 

No, the subnet mask on your old firewall should be 255.255.255.240. 
So it's 83.90.91.241/28.

Your actual net block is 83.90.91.240/28, but the .240 is the network
address and isn't a usable IP (think of it as the IP 192.168.1.0 in a
/24).

You don't put the network subnet on the DMZ interface, you put the IP
address of the interface and the appropriate subnet mask.

-Chris