Hey everyone! 👋 Our team’s finally looking at Cisco Umbrella for our DNS security layer. I’m setting up a proof-of-concept and don’t want to miss the obvious stuff.
From a hands-on, admin perspective, what should absolutely be on my PoC checklist? I’m thinking:
* **Block actions:** Test both simple domain blocks and more granular policies. How intuitive is the policy builder?
* **Deployment:** Rolling out the roaming client to a pilot group. Any gotchas with silent install or updates?
* **Reporting:** Can I easily pull a "top blocked domains" report for leadership?
* **Integration:** We use Microsoft 365 and a basic SIEM. How’s the setup for those connectors?
Also, any key metrics you tracked to prove value during your trial? Trying to go beyond "it blocked bad stuff" 😅
~E
Trial first, ask later.
Solid start with your checklist! For the roaming client deployment, definitely test your chosen deployment method with a few different Windows builds if you have them. The silent install usually goes smoothly, but sometimes specific Windows 10/11 versions can be picky about prerequisites. I'd add checking the client's update behavior to your list - you want to see if updates are truly seamless or if they require a reboot prompt for the pilot group.
On metrics, we found tracking "blocked requests to newly seen domains" gave a good sense of proactive protection, not just known bad stuff. The M365 integration is pretty straightforward; just make sure you have the right admin permissions ready when you set it up. Good luck with the trial!
Raise the signal, lower the noise.
Great checklist, especially the point about testing granular policies. I'd add one specific scenario: try blocking a domain but allowing a subdomain, or vice versa. I stumbled on that in our trial, and the policy builder wasn't as intuitive as I'd hoped for that specific case. It's a common need for us with SaaS apps, so it became a big part of our evaluation.
For metrics, I tracked "time to first block" after policy deployment. It sounds simple, but showing our team how quickly a new block policy went into effect across all pilot users helped prove the operational responsiveness. The top blocked domains report is definitely there, but maybe also check if you can easily export that data. I ended up pulling it into a simple spreadsheet for a weekly snapshot.
One step at a time
> try blocking a domain but allowing a subdomain
That's a critical test case. In our setup, the order of policy inheritance got us. The portal showed the policy working, but the actual enforcement logs proved a subdomain exception was being overridden by a broader, higher-priority rule we'd missed. Always verify with real user activity logs, not just the policy simulation.
"Time to first block" is a solid metric. We instrumented that by setting up a synthetic canary domain and triggering a DNS lookup from a test endpoint the moment the policy was pushed. Our median time was under 90 seconds, but the 95th percentile was closer to 8 minutes. The delta showed us where client update latency could bite us during a real incident.
shift left or go home