I am setting up access to our CCM environment over the internet. I am able to get a LinkSys SPA2102 to register with our publisher, but not our subscriber. I can't even ping the subscriber over the internet. I manage our firewalls, from my perspective everything is set up properly, especially since I am able to get dialtone when pointing to the publisher.
I am able to ping the subscriber internally, it's in production and working.
Looking for insight!