[20497] in North American Network Operators' Group
RE: Maybe I'm misreading this but...
daemon@ATHENA.MIT.EDU (Martin, Christian)
Thu Oct 15 01:33:52 1998
From: "Martin, Christian" <CMartin@mercury.balink.com>
To: "'Tim Wolfe'" <tim@clipper.net>, "'Dean Anderson'" <dean@av8.com>
Cc: "'Barry Shein'" <bzs@world.std.com>,
"'nanog@merit.edu'"
<nanog@merit.edu>
Date: Thu, 15 Oct 1998 01:18:54 -0400
Also note that these IPs may sit on interfacs accompanied by 'routable'
IPs, such as the 'secondary' keyword is used in Cisco-Speak (maybe
others as well, I dunno). I've seen cases where customer's use RFC 1918
addreses as the primary and their real addresses as secondaries, so as
to make it difficult to attack the router. TTL exceeded messages then
get returned with the primary IP....
-Chris
> -----Original Message-----
> From: Tim Wolfe [mailto:tim@clipper.net]
> Sent: Wednesday, October 14, 1998 7:16 PM
> To: Dean Anderson
> Cc: Barry Shein; nanog@merit.edu
> Subject: Re: Maybe I'm misreading this but...
>
>
> On Wed, 14 Oct 1998, Dean Anderson wrote:
>
> > The 172.16 to 172.31 block is reserved in RFC1918 for
> private internets.
> >
> > The last address 209.149.111.17 belongs to a bellsouth
> block. It's a safe
> > bet that libidomax.com is a bellsouth customer, or a customer of a
> > bellsouth customer. Probably bellsouth and alternet are
> peering and using
> > a private network between themselves.
> >
> > --Dean
>
> Or Bellsouth is using Alter.Net for their transit provider
> just as US West
> is in the Pacific NW...
>
> Tim
>
> ----------------------------------------------------
> Timothy M. Wolfe | Why surf when you can Sail?
> tim@clipper.net | Join Oregon's Premier
> Sr. Network Engineer | Wireless Internet Provider!
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> ----------------------------------------------------
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>
