How to enable DNS tunnel detection on SonicWall?
Description
DNS tunneling can be used by attackers to receive data from the internal network or inject a malware code in the DNS request. Most of the times the DNS protocol is a trusted one but on the DNS request can be more information.SonicWALL is having the ability to filter those kinds of requests to check if there are supplies information on the packets.
Resolution for SonicOS 7.X
This release includes significant user interface changes and many new features that are different from the SonicOS 6.5 and earlier firmware. The below resolution is for customers using SonicOS 7.X firmware.
You can find it on NETWORK|DNS|DNS Security|DNS tunnel detection
Enable DNS tunnel detection is for detection of the DNS tunnel and Block All The Clients DNS Traffic this feature is for blocking clients with the DNS that are detecting using DNS tunneling.
Resolution for SonicOS 6.5
This release includes significant user interface changes and many new features that are different from the SonicOS 6.2 and earlier firmware. The below resolution is for customers using SonicOS 6.5 firmware.
 You can find it on Manage|NETWORK|DNS Security|DNS tunnel detection
Enable DNS tunnel detection is for detection of the DNS tunnel and Block All The Clients DNS Traffic this feature is for blocking clients with the DNS that are detecting using DNS tunneling.