This is a Verizon Fios forum. When trying to help people diagnose issues, I discuss currently available and deployed products on the Verizon Fios network.
The IP TV trials were just that - trials. And the ONT portion of the combo ONT/ROUTER unit did not have a firewall, that was in the router portion of the unit. Same for other combo units possibly used by other ISPs. But none of this helps the OP.
Verizon ONTs do not have firewalls. So there is no firewall in the ONT that could be involved in the problem as their mesh network provider's support claimed. At this point, I believe the best course of action is to test with Ethernet only connections. There may be other approaches I haven't thought of. If you've other suggestions to help the OP, please share.
