RE: Scam telemarketers spoofing our NOC phone number for callerid

[Matthew Huff <mhuff () ox com>]

Our system is PRI based, not sip.

----
Matthew Huff       | One Manhattanville Rd
OTA Management LLC | Purchase, NY 10577
http://www.ox.com  | Phone: 914-460-4039
aim: matthewbhuff  | Fax:   914-460-4139



> -----Original Message-----
> From: wherrin () gmail com [mailto:wherrin () gmail com] On Behalf Of William Herrin
> Sent: Wednesday, October 06, 2010 11:15 AM
> To: Dan White
> Cc: Matthew Huff; (nanog () nanog org)
> Subject: Re: Scam telemarketers spoofing our NOC phone number for callerid
>
> On Wed, Oct 6, 2010 at 10:37 AM, Dan White <dwhite () olp net> wrote:
> > If your PBX is SIP based, you might be victim of a SIP registration hijack,
> > which are on the rise, based on traffic we've been seeing in our network.
>
> I had my unpublished asterisk box up for all of two days before
> getting half a megabit per second worth of false SIP registration
> attempts. Filled /var/log. I had to write a script to dynamically
> filter source IPs with too many failures.
>
> Regards,
> Bill Herrin
>
> --
> William D. Herrin ................ herrin () dirtside com  bill () herrin us
> 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
> Falls Church, VA 22042-3004

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