[isalist] Re: Isa 2004 and CIDR?
- From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
- To: <isalist@xxxxxxxxxxxxx>
- Date: Wed, 12 Jul 2006 10:09:20 -0500
http://www.ISAserver.org
-------------------------------------------------------
It's actually a network ID, not a sub-network ID
Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
MVP -- ISA Firewalls
> -----Original Message-----
> From: isalist-bounce@xxxxxxxxxxxxx
> [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Thor
> (Hammer of God)
> Sent: Wednesday, July 12, 2006 10:07 AM
> To: isalist@xxxxxxxxxxxxx
> Subject: [isalist] Re: Isa 2004 and CIDR?
>
> http://www.ISAserver.org
> -------------------------------------------------------
>
> 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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> >
> >
> >
>
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