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PhoneBoy
Admin
Admin
‎2025-06-03 10:10 AM
In response to Zee

In larger environments, it's typical to have internal DNS servers (can be Active Directory, BIND, or something else) that forward requests to public DNS servers for anything that it can't resolve.
There is also two different versions of DNS for a given domain (internal, which has everything, and external, which only has externally accessible servers). 

While forwarding requests for some domains directly to public DNS might help in your quest to reduce overall usage of Cisco Umbrella, I'd be careful with certain domains:
https://www.bleepingcomputer.com/news/security/azure-domains-and-google-abused-to-spread-disinformat... 

 

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