We had asterisk running, we had SIP trunks to a company called Xmission in Salt
Lake city.
Something internally here got hijacked and started sending SIP traffic to
Xmission. We got a huge bill before anyone noticed.
So what we did was to put the SIP trunks on their own static IP. That is the
only thing on that globally routable IP connects to.
Xmission uses that IP to send us terminating traffic. We use that IP to send
traffic to Xmission.
I would rather go back to using that IP for everything here, but we don’t want
a repeat of history.
Is it worth trying to do? Or just leave it alone?
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