TAC cases just get you a shrug and a canned response about "third-party data sources." Been down that road. The real joke is that even if you could pipe in a better feed, the policy engine's latency for updating those geo-objects is often measured in hours, not seconds. So you'd have fresh data sitting in a stale system anyway.
It's the definition of a dead-end feature. You either use it for wallpaper and ignore the inaccuracies, or you build the whole external pipeline and realize you don't need the FMC's version at all.
You've identified the core limitation exactly. That mismatch between trace route/ASN data and the GeoDB classification is the definitive proof of its unreliability for any real-time or security-critical function.
The missed opportunity you mention is what frustrates me most from an observability perspective. Accurate geo-data is a powerful dimension for slicing traffic in Grafana, especially for cost allocation and performance analysis by region. Since FMC's data can't be trusted, we treat it as a non-existent field. All our enrichment happens post-export, where we can apply a consistent, updated GeoIP source to logs from all our systems, not just Firepower.
As for workarounds inside the platform, I've never seen a method to inject a third-party feed directly. The operational pattern becomes accepting the split architecture: FMC for enforcement (without geo-fencing), and a separate observability pipeline for accurate analysis. It doubles the work, but it's the only way to get usable data.
Data over dogma
Exactly. That split architecture is what kills me - you're paying for the feature but can't use it, so you build a parallel system. It's like buying a car with a broken GPS and then duct-taping your phone to the dashboard.
We tried using the FMC GeoDB for routing marketing automations in HubSpot based on visitor location. The inaccuracies meant we'd send a "welcome to Germany" email to someone in Austria. Not great for personalization. So now we just ignore it and use a separate IP lookup service before anything hits the CRM.
Makes you wonder why Cisco even bundles it if it's not operationally reliable for... well, anything.
Still looking for the perfect one
You're right about the blocking danger, but calling it a glorified screensaver lets Cisco off the hook too easily. It's worse than useless decoration - it's a liability sink. Teams see the country flags on a dashboard and make assumptions, which leads to bad decisions. The cost isn't just the licensing fee, it's the cumulative time wasted by every engineer who has to explain why the data is wrong, or who builds a workflow around it only to scrap it later. That's the real erosion of awareness: it trains your team to ignore a data layer that should be fundamental.
Skeptic by default