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Valid IP address

I'm setting up some vpn's which means I need each network in its own range. So I need to know the max and minimum number allowed for the third quad.

I'm staying with the 192.168.x.x range and know about the 10.x.x.x range.
For simplicity sake I'm planning on making each network as class C even though I'm aware of the other subnetting options.

What I am not sure of
Is a valid ip address for a private network or do I have to back it down to
1 Solution

The official private address ranges are as follows: -  (10/8 prefix) -  (172.16/12 prefix) - (192.168/16 prefix)

See --> http://www.faqs.org/rfcs/rfc1918.html

As you are using a mask then the valid address range could indeed be - if you wished - The network address would be and braodcast address so these could be restricted as host addresses. Its a bit different if you use non-default masks (sub-netting).

davidpmAuthor Commented:
Thanks I was just a little insecure about the 255 in the third quad.
But I just came it to my office and switched the network and it worked fine.
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