I've seen similar issues with Polycom phones, the fix was to set voIpProt.SIP.strictUserValidation to "1". I don't use any other brands, so I don't know about others. On 08/08/2018 01:43 PM, Carlos Alvarez wrote:
Do most of you have the phones authenticate incoming calls?? We haven't been, but occasionally find a router that has unfiltered full cone NAT (Cisco) or that puts one phone on 5060 with no filtering by IP.? The result is that the phone will start ringing at random as script kiddies hit the IP and port 5060 trying to find servers to exploit.? I don't see a downside to changing to auth, but not having done it outside of a few tests of a small number of phones, I figured I would ask.
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