[VoiceOps] Phone auth for incoming calls?

[Eric Wieling]

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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