Scam telemarketers spoofing our NOC phone number for callerid
Jon Lewis
jlewis at lewis.org
Wed Oct 6 15:33:48 UTC 2010
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.
----------------------------------------------------------------------
Jon Lewis, MCP :) | I route
Senior Network Engineer | therefore you are
Atlantic Net |
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
More information about the NANOG
mailing list