alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY onion.cab tor2web .onion Proxy domain in SNI"; flow:established,to_server; tls.sni; content:".onion.cab"; fast_pattern; endswith; reference:md5,de81fab8ec96bef76db828f4c1a42e4d; classtype:policy-violation; sid:2018879; rev:4; metadata:created_at 2014_08_01, deprecation_reason Relevance, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_26, reviewed_at 2024_03_26;)