I've about 22 devices XG Firewalls in my organisation, which I'm managing through Sophos Central (Just firewalls no other Central Services are being used).
Now My concern is can anyone else with a Sophos Central ID add and manage these firewalls, provided he/she has the Firewall Serial Numbers.
Central uses a two way integration. Means, you have to add the serial to central and then add a OTP (one time password) to the firewall. So to speak, without access to the firewall, you cannot control your firewall.s