From owner-freebsd-questions  Wed Oct 21 12:18:38 1998
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	Wed, 21 Oct 1998 12:19:34 -0700 (PDT)
Date: Wed, 21 Oct 1998 12:19:34 -0700 (PDT)
From: Dan Busarow <dan@dpcsys.com>
To: Loren Daniel Koss <loren@boingo.pciway.com>
cc: freebsd-questions@FreeBSD.ORG
Subject: Re: HELP! Can't see second Ethernet Card..
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On Wed, 21 Oct 1998, Loren Daniel Koss wrote:
> Okay, here's the diagram I want:
> 
> Router (206.0.98.1)
> |
> |
> |Ep0  (206.0.98.10)
> -Firewall- (IPFW)
> |Ep1 (206.0.98.9)
> |
> |
> |
> ------HUB----------
> |
> |
> 206.0.98.200 - 206.0.98.250

You need to use subnetting to do this.  The simplest, though probably
not the best based on the numbers you show is two subnets like

Router (206.0.98.1)
 |
 |
 |Ep0  206.0.98.10 netmask 255.255.255.128, broadcast 206.0.98.127
 -Firewall- (IPFW)
 |Ep1 206.0.98.129 netmask 255.255.255.128, broadcast 206.0.98.255
 |
 |
 |
 ------HUB----------
 |
 |
 206.0.98.130 - 206.0.98.254


You could also use a netmask of 206.0.98.192 on this inside net
with two external subnets, one a /25 as above and the second another
/26 with a netmask of 209.0.98.192.  This would give you the address
range 193-254 on the inside with the rest on the outside.

Routing will be automatic in the first example, you'll need to add
a static route for one of the two outside nets in the second case.

You may also want to get a copy of _TCP/IP Network Administration_
from O'Reilly.

Dan
-- 
 Dan Busarow                                                  949 443 4172
 Dana Point Communications, a California corporation        dan@dpcsys.com
 Dana Point, California  83 09 EF 59 E0 11 89 B4   8D 09 DB FD E1 DD 0C 82


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