why don't Dream Machines ever pop up on the for sale forum here !! (edit: boo no Christmas smileys yet)
Ah limiting the IP range is a great idea.Not checked on unifi as some devices just have a simple management option to enable ping, if not you can create a firewall rule on the wan interface to allow icmp echo-reply, if it’s just your fibre company then you could also limit to their source addresses, just ask for the ip or range that will be pinging you.
My home router is on its last legs so I need a replacement. I'm not sure I'll go with an all-in-one modem/router again since there seems to be less support out there for them, plus any new technologies would require a separate modem anyway (e.g. my current router doesn't support G-Fast). I've heard good things about Ubiquiti but I just went to their website's "products" section and it just lists like 100 products. How am I supposed to know what I want? Do they not have a product chooser page?
I'd avoid the USG and USG-Pro, they're EOL devices.