Ok, let me re define the situation. I have two networks going to the same isp through an 8 port hub, two firewalls connecting two separate networks that are exact clones of each other in every way except two domain name and ip One network is 10.0.0.0 with a subnet of 255.255.255.0 The other is 10.10.0.0 would the subnets be the same, How about if I wanted them both to connect to one firewall, would I just set up a rule in iptables to masq the addresses from the separated firewall, how about if I just wanted everything to go through the 10.0.0.0 network to the internet. I thought the second 10 in 10.10.0.0 would cause the subnet to change. But if the subnets are the same in two networks does that mean they can communicate without the use of a router. -----Original Message----- From: Ewan Leith [mailto:ewan@longwords.org] Sent: Friday, April 12, 2002 2:11 PM To: john@wishdev.com Cc: suse-linux-e@suse.com; Gideon Hallett Subject: Re: [SLE] Subnet mask settings.... You are right, ive not been paying attention to this thread, but though 2 IPs with those subnet masks are on the same 9 bit subnet. The whole subnet will consist of 10.0.0.0-10.0.1.255 What he wants is a normal Class C subnet. Ewan On Fri, 2002-04-12 at 18:54, John Higgins wrote:
First network 10.0.0.0 255.255.254.0 Second network 10.0.1.0 255.255.254.0
In no way do I mean to sound rude - but isn't that completely wrong?
Doesn't the above subnet mask mean that those addresses are on the same subnet? If the subnet mask ends at the 23rd binary digit then 10.0.0.x and 10.0.1.x are in the same subnet - the first 23 binary digits are 00001010 00000000 0000000 - and doesn't that mean they both exist within the same host area of the last 9 binary digits? Wouldn't you need a 255.255.255.0 subnet mask in this case? This looks awfully similar to 2 class C networks and all class C's have 255.255.255.0 as the subnet mask.
John W Higgins john@wishdev.com
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