Ports UDP500 and/or UDP4500 appear to be blocked
It seems that ports UDP500 and/or UDP4500 are blocked for me. Since I installed and registered my new modem these ports are locked. Ports were open with the original Comcast modem.
My router is trying to establish router-to-router VPN with my office but is unable due to these or one of these ports is blocked.
I have Netgear CM1150V modem. It doesn't have any settings to change. Comcast rep was following their manual that says that the gateway has to be in "Bridge" mode, but there is no such a mode for CM1150V since this is just a modem and not a router.
Please help how these ports can be made available.