[SR-Users] help with SIP Notify message, to make a endpoint (SPA504G and similar) to reboot.

[Corey Edwards]

On Thu, Mar 13, 2014 at 8:26 AM, Pedro Niño <nino.pedro at gmail.com> wrote:

> The other (ugly) option, is to remove the auth from the phone, for the Sip
> Provisioning, but that would leave and open door to a reboot attack without
> auth needed from any IP. And I dont like that option.
>

This might not be as bad of an option as you think. If the SPA is behind a
stateful firewall then that firewall should allow the NOTIFY from the
registrar due to the REGISTER and NAT keep-alive packets opening the
firewall, but disallow SIP from any other source. I would recommend
verifying that before you deploy it though as I haven't tested it myself.

Corey
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