I use pfsense as my router behind an MT 992 modem on g.fast.
Every now and again (every month or so) my connection goes down and pfsense doesn't bring it back up so I'm trying to configure gateway monitoring.
I've tried using 1.1.1.1 or 8.8.8.8 as the monitor address but I've seen advice that I should use my ISP first hop IP address instead, but based on a couple of tracert's just now that first hop address is dynamic.
Does anyone know of a good BT IP address I can use to monitor WAN gateway up status please?
I've tried using a BT DNS address but that seems to fail after a few min.
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There isn't one unless you have a static IP address. Your modem is the first hop which recieves a dynamic address.