We have a network set up strictly for an emergency system we use. Is there a way to block absolutely all traffic except what meets the one allow rule needed for the emergency system?
Yes, you can create policy for specific sources IP addresses.
- Allow specific destination from those system wanted to access using custom url categories.
- Deny all from those servers.
You can leverage firewal policies as well for otherthan web traffic.
Note that the GRE with sub location to be configured with those systems.