We have a Sonicwall NSA2400 as our edge firewall with DHCP issuing static addresses to known MAC addresses.
When a new user PC or device needs network access, their MAC address is recorded and a Static DHCP rule is added to issue the IP. Is there any way to block access to any device that has not received an IP address from the DHCP server?
I know we can add a deny firewall rule and only permit known MAC addresses, but this is another management step that needs to be done per device. I also know we can institute a RADIUS server, but again, more managing is required. I was looking for a built in user group such as 'DHCP AUTHENTICATED USERS' or similar.