[12762] in North American Network Operators' Group
Re: Denial of service attacks apparently from UUNET Netblocks
daemon@ATHENA.MIT.EDU (Jay R. Ashworth)
Wed Oct 8 00:24:23 1997
Date: Tue, 7 Oct 1997 22:50:44 -0400
From: "Jay R. Ashworth" <jra@scfn.thpl.lib.fl.us>
To: Dalvenjah FoxFire <dalvenjah@dal.net>
Cc: wb8foz@nrk.com, nanog@merit.edu
In-Reply-To: <199710080120.SAA04206@dragonlair.dal.net>; from Dalvenjah FoxFire <dalvenjah@dal.net> on Tue, Oct 07, 1997 at 06:20:01PM -0700
On Tue, Oct 07, 1997 at 06:20:01PM -0700, Dalvenjah FoxFire wrote:
[ David Lesher:]
> > Just want to make sure all parties here do not think ANI == CNID.
> > They are different critters. You get CNID usually. Real time
> > ANI is available on 800 trunks, but at a cost.
>
> I realize this is probably something one learns in Telco 101, which I
> haven't taken, but if CNID == Caller ID, wouldn't ANI be *more* useful?
Sometimes. CNID bounces around with forwarded calls, as was pointed
out to me in private mail earlier today, whilst ANI will be from the
_last_ site in a forwarding chain -- since that's the only place an
INWATS subscriber is paying for a call from.
> Or does CNID report the number regardless of Caller-ID blocking on PRI
> lines/etc?
No, CNID is Caller-ID. Blocking is _supposed_ to be implemented by the
_terminating_ end office. If you receive your traffic over dedicated
trunks from an IXC, rather than a LEC, you're not _supposed_ to get
it... but I'd be unsurprised if some IXC's get this wrong.
I _would_ be surprised if many LEC's were blowing this.
> (I'm assuming that CNID == standard Caller-ID as it appears on POTS, and
> that ANI == the special service that 800-lines get that *always* reports
> the number, regardless of blocking..if I'm wrong, I'll accept the LART.)
You assume correctly.
Cheers,
-- jra
--
Jay R. Ashworth jra@baylink.com
Member of the Technical Staff Unsolicited Commercial Emailers Sued
The Suncoast Freenet "People propose, science studies, technology
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