SECOPS

Cloudflare WAF Rule Effectiveness Review and Tightening Loop

On a weekly schedule it audits each candidate rule currently running in log-only mode in Cloudflare, measures how cleanly it matched real attacks versus legitimate traffic.

CategorySecOps
Enginesim
Difficultyintermediate
Triggerschedule
Steps6
Setup~15 min

How it runs

The automated pipeline, trigger to output.

  • TriggerWeekly schedule
  • ActionList log-only rules and match counts in CloudflareCloudflareCloudflare
  • LogicScore each rule's match precision
  • ActionRecommend promote / tighten / retireOpenAI
  • OutputPost recommendations to Slack for approvalSlack
  • ActionApply approved change in CloudflareCloudflareCloudflare

What it does

It closes the loop on rules that were deployed in observation mode. Rather than letting log-only rules pile up forever, it weekly scores each one's match precision and recommends whether to promote it to active blocking, narrow it, or retire it.

When to use it

When your anomaly-to-rule pipeline produces many log-only candidates and you need a disciplined cadence to graduate the good ones and prune the noisy ones without manual log-spelunking.

How it works

  1. 1A weekly schedule fires.
  2. 2List active log-only rules and pull their match counts from Cloudflare.
  3. 3Logic scores each rule's precision: malicious matches versus likely-legitimate matches.
  4. 4An LLM step recommends an action per rule — promote to block, tighten the expression, or retire — with reasoning.
  5. 5Post the per-rule recommendations to Slack with approval buttons.
  6. 6On approval, apply the chosen change to the rule in Cloudflare.

Set it up

What you configure once, before turning it on.

  1. 1
    Connect CloudflareWorkers, Pages, R2, KV — the edge stack.
  2. 2
    Connect OpenAIModels, embeddings, files.
  3. 3
    Connect SlackChannels, DMs, threads, mentions.
  4. 4
    Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
  5. 5
    Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
  6. 6
    Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.

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