[VoiceOps] Toll-Free Fraud/Spam

[J. Oquendo]

On Thu, 03 Apr 2014, Ivan Kovacevic wrote:

> A few weeks back, one of our client TFN #s got hit by 60,000 calls per
> hour. The number was not active so none of the calls were answered, but it
> was just odd... The two ANIs were not in service. We removed the CICs so as
> not to annoy the carrier and called it a day... only because it wasn't an
> active number. Not sure what we would've done if it was.
> 
> 
> 
> Best Regards,
> 
> 
> 
> Ivan Kovacevic
> 
> Star Telecom | www.startelecom.ca | SIP Based Services for Contact Centers
> 
> 

We had a client complain about something similar. They have
nothing more than a trunk, so we looked up our CDRs and
found nothing no inbound at all. We determined it was
something hitting their PBX directly. I'd perform a packet
capture when this occurs, baseline whatever is common in
these packets, and look for a mechanism to block that.

E.g.:

if [ all packet contains this - only found in bad packets ]

then

do something

fi


-- 
=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
J. Oquendo
SGFA, SGFE, C|EH, CNDA, CHFI, OSCP, CPT, RWSP, GREM

"Where ignorance is our master, there is no possibility of
real peace" - Dalai Lama

42B0 5A53 6505 6638 44BB  3943 2BF7 D83F 210A 95AF
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x2BF7D83F210A95AF