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[ILUG] [OT] private IPs in public dns zones

[ILUG] [OT] private IPs in public dns zones

Thomas Bridge tbridge at vianetworks.ie
Thu Jul 19 12:06:38 IST 2001


At 23:26 18/07/2001 +0100, you wrote:

>On Wed, 18 Jul 2001, Kevin Gannon wrote:
>
> > Hmmmm, its kinda of a pain when all your customers ring you to
> > say that they cant traceroute to there web site from provider X.
>
>but it saves on IPs..

And makes it a hell of a lot more difficult to debug network 
problems.   IPv4 usage conservation isn't designed to make life more 
difficult, just make people more sensible in their usage of same.

>but certainly the Tier 1 border routers should be filtering out
>private IP space.

How - where?

> > In fact I would ask questions of any ISP doing packet filtering
>
>not packet filtering - route filtering...

Any sensible ISP is doing some route filtering - but that doesn't stop us 
receiving packets with a source address of 192.168.1.1 (it's just if that's 
the destination, we'll drop it).

>so tell me, where do i get a class B? (or anything close to a class
>B, ie at least /20). roll on ipv6. i have a full 64 bits of 6BONE
>unicast address space all to myself: 3ffe:80c0:220:c/64

Why the hell do you need a class B size of space anyway?

T.






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