How it works

Your logs stay in your browser

  • IPs are extracted in your browser. Private and reserved addresses (10.x, 192.168.x, etc.) and the rest of your log lines are never sent.
  • We check each IP against the alliance and its 0–1000 Crime Score.
  • You get the results by email, usually within 24 hours.
  • Free, no sign-up.

In the PHP2Shell attack burst, 25 of the 27 attacking IPs were already scored by OneFirewall before it began.

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Crime Score

What the score tells you

RangeBandRecommended action
0–80Clean / UnobservedNo enforcement action recommended
80–140Watchlist / MonitorLogging and alerting only
140–250Block RecommendedStart at ≥400 for a safe initial deployment, then lower toward 190
250–1000Immediate BlockHigh-confidence, multi-sector confirmed

How the Crime Score works →

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A free Proof of Value checks every connection your firewall allowed over 10 days, not just a sample.

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