alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET CHAT Facebook Chat (send message)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/ajax/chat/send.php"; http.header; content:"facebook.com"; classtype:policy-violation; sid:2010784; rev:6; metadata:created_at 2010_07_30, signature_severity Informational, updated_at 2020_09_11;)