alert tls $HOME_NET any -> $EXTERNAL_NET 443 (msg:"ET POLICY tor4u tor2web .onion Proxy domain in SNI"; flow:established,to_server; tls.sni; content:"tor4u.net"; fast_pattern; reference:md5,de81fab8ec96bef76db828f4c1a42e4d; classtype:policy-violation; sid:2018878; 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_20, reviewed_at 2024_03_20;)