[cisco-voip] IP Phone Spam?

[Lelio Fulgenzi]

That sounds like multi-cast spam. Quite scary and quite possible. Typical access control lists prevent access to the voice VLAN, but I'm not sure how multi-cast ACLs work. In essence, someone has likely sent a multi-cast join request to the phone, then started streaming audio to that multi-cast group. If you have Informacast, then your system is enabled for that to happen. In our situation, no line keys would light up, only the speaker button and the mute button. Then a little phone icon in the bottom right of the phone display. 

Scary indeed. 


--- 
Lelio Fulgenzi, B.A. 
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN) 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
"Bad grammar makes me [sic]" - Tshirt 


----- Original Message ----- 
From: "STEVEN CASPER" <SCASPER at mtb.com> 
To: "cisco-voip voyp list" <cisco-voip at puck.nether.net> 
Sent: Wednesday, December 9, 2009 11:15:19 AM GMT -05:00 US/Canada Eastern 
Subject: [cisco-voip] IP Phone Spam? 


Anybody have any idea what this might be? This is from user who has witnesses to this event and has always been reliable when it comes to reporting troubles: 

"Music began to emit from the speaker of the IP deskphone, followed by an advertisement for someone hawking software. I had not received or placed a phone call. When the voice got to the end of the advertisement, the sound disappeared and the phone functioned normally." 

There were no line keys lit and the user was unable to control the phone to get rid of the audio. We have an Informacast system but the log files indicate no broadcasts to her telephone. Could it be some sort of EMI/RFI? The user has a 7961. 

Steve 

Steve 

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