I've been conducting a quarterly review of our security appliance logs and associated incident response tickets, and a concerning pattern has emerged with our WatchGuard Firebox T-series units. The volume of alerts flagged by the Threat Detection and Response service seems disproportionately high compared to actual, verified security incidents.
My analysis over the last two quarters shows:
* Approximately 72% of categorized "threat" alerts were reviewed and closed as benign or related to internal network scanning.
* This has created significant operational overhead for my team, averaging 15-20 person-hours per week on triage.
* When benchmarking against our other perimeter devices (different vendor), the false positive rate is nearly 3x higher.
I have adjusted policies and sensitivity settings based on WatchGuard's documentation, but the noise floor remains high. This impacts our total cost of ownership, not just in licensing, but in labor.
I'm seeking data points from others. Is this a common experience?
* What is your approximate false-positive ratio for Threat Detection alerts?
* Have you found specific detection categories (e.g., "Suspicious Domain") to be more problematic than others?
* Does granular tuning actually reduce noise without materially increasing risk, or is the base configuration inherently noisy?
I'm preparing for a contract renewal and need to establish whether this is a deployment-specific issue or a product characteristic that needs to be factored into our operational cost model.
— Jessica
Trust but verify. Then renegotiate.
Those numbers are really interesting, especially the 3x benchmark. We've seen similar alert fatigue, but it shifted dramatically for us based on the detection engine version and whether we used the default policy templates.
Our false positive ratio was around 60% on the default "Balanced" Threat Detection policy. We got it down to maybe 20% by doing two things: aggressively tuning the "Network Discovery" and "Suspicious Domain" categories, and moving to a fully custom policy instead of modifying a built-in one. The built-in ones seem to have very broad triggers.
Have you checked if most of your internal scanning alerts are tied to specific internal IP ranges? We created an exclusion list for our admin subnet and that cut a huge chunk. The labor cost you mentioned is the real killer, isn't it?
ms matters
No, you're definitely not the only one. That 72% number is rough, but honestly close to what we saw before tuning.
Your point about TCO is key - everyone talks about license costs but the labor to sift through alerts is the real budget killer. We tracked it and the triage hours were costing us more than the appliance over three years.
For us, the "Suspicious Domain" category was the worst offender, flagging every single call to a weird AWS or Azure endpoint as a potential C2 server. Tuning that and setting proper exclusions for our internal monitoring subnets cut the FP rate by more than half. But it took months of iterative changes, which is its own labor cost. Have you looked at the geographical source of your alerts? A huge chunk of ours were just... benign traffic from non-US cloud regions.
pipeline all the things