How to block network access to devices not given an IP by the DHCP server on a SonicWall?

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.

Thanks.
LVL 9
Rob_JeffreyIT/ProgrammingAsked:
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Craig BeckCommented:
DHCP snooping would be the way to go but I'm not sure that the Sonicwall supports it.

You'd need to do.it at your switches and your wireless network.
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btanExec ConsultantCommented:
Can try to enable its MAC-IP based  Anti-spoof cache checks
https://support.software.dell.com/kb/sw11919
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Craig BeckCommented:
MAC-IP based  Anti-spoof cache checks
A.K.A DHCP snooping :-)

Good shout btan!
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btanExec ConsultantCommented:
yap same objective just different naming btw Cisco and Sonicwall :)
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Rob_JeffreyIT/ProgrammingAuthor Commented:
Awesome.  I will enable that and see who can break in.
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Craig BeckCommented:
Thanks, Rob, but I think breadtan's comment should be marked as the answer :-)
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