Leland E. Vandervort wrote:
Managed to get to the bottom of it, and it was indeed a SIP User-Agent brute-force attempt. Interestingly, though, that your mail mentions specifically verizon... the majority of the remote addresses during this brute-force attempt were also behind verizon... coincidence? Hmm..
There are at least two projects I'm aware of and some tools released/getting released working on war-dialing over SIP.
One tool to take a look at and see if it fits the bill is WarVOX from Metasploit's HD Moore.
http://www.warvox.org/index.html Gadi.