[VoiceOps] Phone auth for incoming calls?

[Alex Balashov]

That would depend on the sending UA's ability to answer such challenges, unless you're referring to some setting to white-list IPs or restrict sources to previously called endpoints. 

On August 8, 2018 1:43:45 PM EDT, Carlos Alvarez <caalvarez at gmail.com> 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.


-- Alex

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