alert udp $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET P2P BitTorrent DHT find_node request";
content:"d1|3a|ad2|3a|id20|3a|"; nocase; depth:24;
content:"6|3a|target20|3a|"; nocase; distance:20;
content:"e1|3a|q9|3a|find_node1|3a|"; nocase; distance:20;
content:"e1|3a|q9|3a|find_node1|3a|"; distance:20; nocase;
threshold:type both, count 1, seconds 300, track by_src;
reference:url,wiki.theory.org/BitTorrentDraftDHTProtocol;
classtype:policy-violation;
sid:2008582; rev:7;
metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)