CloudFlare sites failing EDNS compliance


I was checking my sites for EDNS compliance, and noticed that compliance failed. In fact, the same failure is even happening on! See EDNS Compliance Tester . Is this to be expected, and if so, is there a date set for remediation?

Using the online tool you will get false positives. Try tests from your machine (Cloudflare passes all for example). I will write a shell script and share here.


Bash script for checking EDNS Compatibility.



Thanks! Glad to see that it’s the tool and not Cloudflare :slight_smile:

After a few tests I got false positives too. Seems too many requests fires defense mechanisms. After all deadliest DDoS attacks are DNS amplification attacks and with EDNS they would be more dangerous.

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