Basic DMZ routing/subnet question

Basic DMZ routing/subnet question

Post by Scott W. Peters » Sat, 06 Oct 2001 01:04:03



I have a question about the subnetmask and gateway on our Cisco
router:

Would the Cisco have a subnet mask of 255.255.255.128 and a gateway of
x.x.x.251 based on the below information?

We have a public Class C and are looking to break it into 2 subnets,

x.x.x.1 to x.x.x.126 : DMZ      /dev/eth2
x.x.x.129 to x.x.x.254 : External Network       /dev/eth1
192.168.1.1 to 192.168.1.254 : Internal Network /dev/eth0

Linux:
eth2 x.x.x.126
eth1 x.x.x.251
eth0 192.168.1.1

Cisco router connects us to the internet.
Cisco x.x.x.254

Here is the layout:
Internet -> Cisco -> Linux -> DMZ or Internal

Does anyone know of a site that gives some basics on the subnetting
and routing of a DMZ?

Thanks a million,

Scott - N9SLA

 
 
 

Basic DMZ routing/subnet question

Post by Michael Heimin » Sat, 06 Oct 2001 05:46:19



18:04:

Quote:> I have a question about the subnetmask and gateway on our Cisco
> router:

> Would the Cisco have a subnet mask of 255.255.255.128 and a gateway
> of x.x.x.251 based on the below information?

> We have a public Class C and are looking to break it into 2 subnets,

> x.x.x.1 to x.x.x.126 : DMZ    /dev/eth2
> x.x.x.129 to x.x.x.254 : External Network     /dev/eth1
> 192.168.1.1 to 192.168.1.254 : Internal Network       /dev/eth0

> Linux:
> eth2 x.x.x.126
> eth1 x.x.x.251
> eth0 192.168.1.1

> Cisco router connects us to the internet.
> Cisco x.x.x.254

> Here is the layout:
> Internet -> Cisco -> Linux -> DMZ or Internal

> Does anyone know of a site that gives some basics on the subnetting
> and routing of a DMZ?

> Thanks a million,

> Scott - N9SLA

You may check RFC2462,2401,2402 (www.faqs.org).

Another idea would be getting a book about this task, searching
amazon.com should show some.

Good luck

Michael Heiming