June 12, 2026

False-positive review workflow: from block page to audit evidence

DNS filtering fails in production when users cannot tell why a site was blocked and have no legitimate path to appeal. Security teams then disable categories or bypass the agent — and auditors later find a control that existed on paper only. A false-positive review workflow is not a nice-to-have; it is how you keep policy strict without losing the organisation.

What the user sees

ClearScreen sinkholes blocked queries to 127.0.0.1 and serves a branded block page on the endpoint. The page shows the fully qualified domain, the UT1 category or list that triggered the block, and the threat feed source if applicable. That transparency satisfies "informed restriction" expectations in EU workplace policy and reduces "IT is blocking my work" escalations.

What the Console receives

When the user submits a review request, the Console queue receives the domain, original block reason, device identifier, and timestamp. Operators approve allowlist entries or adjust the Customer Environment policy — not ad-hoc local overrides that vanish from audit. Every decision should leave a record exportable with block events for ISO 27001, DORA operational resilience testing, or internal SOC2-style evidence packs.

Operating the queue

Set SLAs: same-day triage for revenue-critical roles, 48 hours for standard staff. Tag recurring domains — if three people appeal the same SaaS tool, fix the tenant allowlist or category once instead of stacking one-off entries. Measure median time-to-close; queues that stall for a week are a leading indicator that policy is too aggressive or communications are too weak.

Evidence chain

Each block writes a JSONL record on the device and, in managed mode, posts to the Console block feed. Tie review outcomes back to those events: blocked, appealed, allowed, or policy changed. NIS2 and DORA assessments increasingly ask for demonstrable user redress paths, not just block counts. A workflow that connects device block page → Console decision → exportable audit closes that gap without opening a helpdesk black hole.

Anti-patterns to avoid

Do not route appeals only through the IT service desk ticket system — you lose the structured link between block reason and resolution. Do not grant permanent allowlist entries without owner and a review date; auditors treat those as undeclared policy exceptions. Do not disable categories silently after complaints; log the change, communicate it, and adjust the Environment policy instead. The goal is a control that stays strict in production because users trust the appeal path, not because security turned enforcement off after the first noisy week.

Forecast review workload with the block page incident calculator before you enable aggressive categories on a large fleet.