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DNS Controls

matthew_smith_8
New Contributor
Hello,

Our WCF (Umbrella) relies on devices using specific DNS servers. Currently I am able to statically assign a DNS server and bypass this security. Is there a way to prevent clients from connecting if they have statically assigned a DNS server?

We are using R510 and R310 Unleashed.
5 REPLIES 5

michael_brado
Esteemed Contributor II
We have a CLI WLAN configuration command "force-dhcp" which will disallow clients with a static IP, but I don't think we look at router-provided or client defined DNS hosts.

tim_brumbaugh
Contributor
Easy solution, block out bound DNS requests on your firewall port 53 outbound, only allow your dc's outbound on port 53 which you should do anyways as part of a good Cyber Security plan.

Thumb's Up!

matthew_smith_8
New Contributor
Thanks for the replies guys. Tim that's a great point. We have, currently, chosen not to deploy Firewalls though, since this is for our branch office public Guest networks and are entirely separated from our corporate network.