[VoiceOps] Preventing random SIP connections to handsets

[Carlos Alvarez]

That's the default for all the handsets, I believe.  There are various
options such as "accept only from proxy" or "only from registrar," but like
I said it varies so it could be more challenging to employ that.  Also in
our limited testing it seems like it may not have had the intended effect.
Possibly because NAT hides the original IP, but I don't know that for sure.

Most phones also have an option to force auth for incoming invites, which
we have not tested yet.



On Fri, Nov 20, 2015 at 1:21 PM, Alex Balashov <abalashov at evaristesys.com>
wrote:

> That said, it is baffling to me that phones accept INVITEs unchallenged
> from anywhere but $REGISTRAR_IP/$OUTBOUND_PROXY_IP.
>
>
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