Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Lars Lehmn DNS Over HTTPS Certificate Inbound"; flow:established,to_client; tls.cert_subject; content:"CN=dns.lars-lehmann.net"; bsize:23; fast_pattern; classtype:misc-activity; sid:2039499; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_10_19, deployment Perimeter, confidence High, signature_severity Informational, tag DoH, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_10_19, reviewed_at 2024_10_08;)