[isalist] Re: Isa 2004 and CIDR?
- From: "Thor (Hammer of God)" <thor@xxxxxxxxxxxxxxx>
- To: "isalist@xxxxxxxxxxxxx" <isalist@xxxxxxxxxxxxx>
- Date: Wed, 12 Jul 2006 08:06:53 -0700
http://www.ISAserver.org
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Well, to be pedantic, 1918 specifies 192.168.0.0 as a "block" of 256 C-Class
subnets, not as a subnet in itself. So you really can't call 192.168 a /16
subnet.
t
On 7/12/06 7:57 AM, "Jim Harrison" <jim@xxxxxxxxxxxx> spoketh to all:
> http://www.ISAserver.org
> -------------------------------------------------------
>
> 1. Per RFC 1918, 192.168 is a /16 subnet; not a /24.
> 2. ISA will not care so long as you define the network properly.
>
> Sent via WM5-enabled PPC-phone
>
> -----Original Message-----
> From: "Taps" <Taps@xxxxxxxxxxxx>
> To: isalist@xxxxxxxxxxxxx
> Sent: 7/11/06 18:47
> Subject: [isalist] Isa 2004 and CIDR?
>
> http://www.ISAserver.org
> -------------------------------------------------------
>
> I know this is going to sound like a silly question, but I cant find any
> information confirming or denying this:
>
> We are currently using a 192.168.140.0/24 subnet in our internal
> network. Recently, we have started using VMWare to do support of some
> of our customers. We like to have duplicate setups of their servers in
> our virtual environment. At the extreme, our customers have 7 separate
> servers per site which we duplicate. We have recently acquired many new
> customers and about half our what we term "multi-site". So there is a
> possiblity of 14 or 21 servers. Each of which needing a static IP
> address (because of the stupid way the software is written).
>
> With the addition of these, plus the rest of our network, we are running
> out of IP Addresses. I am thinking of dropping the subnet mask back to
> a /23 or /22. To give me a usable range of
> 192.168.140.1-192.168.143.254.
>
> I realizing because of CIDR, the theory of 192.x.x.x needing to be a
> classC isnt an absolute anymore. But before I go through and make any
> changes, I was wondering if anyone could confirm or deny that ISA will
> handle this without any major issues.
>
> Before you ask, yes, I plan on testing this before I roll it out. But
> that wont be for a while. I figured if anyone had tried something
> similar they could clue me in on any issues that they might have had.
> If someone has tried it and it just wont work, then I will find another
> alternative.
>
> And yes, switching to a 10.x.x.x address was considered. But again,
> with the way some of the software was written, the IP addresses would
> need to stay the same.
>
>
>
> --
>
> Taps@xxxxxxxxxxxx
> http://Taps.Iniquity.Org
> - "What spirit is so empty and blind, that it cannot recognize the fact
> that the foot is more noble than the shoe, and skin more beautiful than
> the garment with which it is clothed?"
> -- Michaelangelo
>
> - "Build a man a fire, and he'll be warm for a day. Set a man on
>
>
> All mail to and from this domain is GFI-scanned.
>
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