alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO UncensoredDNS DNS Over HTTPS Certificate Inbound"; flow:established,to_client; tls.cert_subject; content:"CN=unicast.censurfridns.dk"; bsize:26; fast_pattern; classtype:misc-activity; sid:2035126; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_02_08, deployment Perimeter, confidence High, signature_severity Informational, tag DoH, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_08;)