Private use of non-RFC1918 IP space

Jeffrey Ollie jeff at
Mon Feb 2 15:57:00 UTC 2009

On Mon, Feb 2, 2009 at 9:48 AM, Trey Darley <trey at> wrote:
> Some colleagues and I are running into a bit of a problem. We've been
> using RFC 1918 Class A space but due to the way subnets have been
> allocated we are pondering the use of public IP space. As the network in
> question is strictly closed I don't anticipate any problems with this as
> the addresses would be unambiguous within our environment. I'm curious if
> anyone else is doing this.

I'd recommend against it, because even though the network is not
connected to the Internet now you never know what the future holds.
Even if it's never connected there are always things that seem to pop
up and cause problems.

Also, if you're address allocation policy has been so badly managed
that you've run out of space in adding more IPs to the pool
isn't going to help for very long.

Jeff Ollie

"You know, I used to think it was awful that life was so unfair. Then
I thought, wouldn't it be much worse if life were fair, and all the
terrible things that happen to us come because we actually deserve
them? So, now I take great comfort in the general hostility and
unfairness of the universe."

	-- Marcus to Franklin in Babylon 5: "A Late Delivery from Avalon"

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