Scam telemarketers spoofing our NOC phone number for callerid

[jlewis at lewis.org (Jon Lewis)]

On Wed, 6 Oct 2010, Matthew Huff wrote:

> Our system is PRI based, not sip.

PRI for origination and termination...but what are your phones?  Old 
school or VOIP/SIP?  If your phone system supports SIP clients, it really 
ought to be IP restricted to only allow your phones access, or use 
something like fail2ban to stop the SIP scanners from eventually gaining 
access.

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  Jon Lewis, MCP :)           |  I route
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