Rules to only access google classroom

[butterchicken]

How could I go about limiting a computer's network access to google classroom resources only? It's difficult to identify all IP addresses and pfsense cannot make firewall rules based on domain names, can it?

Thanks.

[JKnott]

@butterchicken

That would require deep packet inspection. The URL is part of the HTTP header, but beyond that, no. As I understand it, Google often uses the same IP addresses for the various services, so you couldn't filter on that.