Rule History

SID: 2035859 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 2 • Apr 7, 2022, 12:00 PM

Message:

ET INFO Ordns DNS Over HTTPS Certificate Inbound

Rule:

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Ordns DNS Over HTTPS Certificate Inbound"; flow:established,to_client; threshold:type limit, track by_src, count 1, seconds 300; tls.cert_subject; content:"CN=ordns.he.net"; endswith; fast_pattern; reference:url,developers.cloudflare.com/1.1.1.1/dns-over-https/request-structure/; classtype:misc-activity; sid:2035859; rev:2; metadata:created_at 2022_04_07, deployment Perimeter, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_07;)

Created:

Apr 7, 2022, 12:00 PM

Updated:

Apr 7, 2022, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 4, 2025, 9:34 PM

Filename:

rules/emerging-info.rules