We have seen some evidence of SPAM over Internet Telephony or SPIT but what about SPIT on P2P networks? Can that be solved the same way we are addressing it on traditional networks? How will this affect the new P2P SIP initiatives? There have been a few questions like this being raised on the P2P SIP mail list and it would seem as though the answer is not so simple. One member on the list writes:
"Well, I was reading how SPIT (Spam over Internet Telephony) could become a problem in SIP VoIP providers. This problem could be resulted with an array of SBC's, if they are enough mature to that kind of functions. However, in p2p networks, it's pretty more difficult to solve the problem; in fact, I really don't know how it could be done, unless you control any node or super node with a heavy application. Am I right?"
P2P SIP is still in it's very infancy so it's not critical that we solve this today but it sure would help if we could address it before vendors start jumping on board with this new extension to SIP. This and other topics will be discussed at the 64th IETF (Internet Engineering Task Force) Meeting during the P2P-SIP ADHOC BOF (Birds of a Feather) meeting. This ADHOC BOF will be held at the Sheraton Wall Centre on November 11, 2005 in Vancouver. There is a shuttle running between the main IETF venue at the Westin Bayshore. The Bayshore is completely sold out so if you are still thinking of attending the Wall Centre might be a better bet. See you there!
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>P2P SIP is still in it's very infancy so it's not critical that we solve this today but it sure would help if we could address it before vendors start jumping on board with this new extension to SIP.
It is better to kill it right away than wait it to grow.
I'm sure the stats on average usage are monitored so they can see avg human behavior with the service vs. automated bot-like usage.
As usual, their TOS/AUP in most of these providers (vonage, aol totaltalk, etc) have disclosures that permit termination of service if usage is beyond "normal".
As usual, probably requires a "blacklist" of sorts to manage abusive VOIP providers. However note, that most of these providers get access into POTS networks via large providers like L3 and Cogent. Hmmm, still room for possibility.
there is a start up company SIPera that focusses on VoIP security specifically DoS attacks, spam and all that. they have a product called Savon visit www.sipera.com for more details