alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Java .jar request to dotted-quad domain"; flow:established,to_server; http.uri; content:".jar"; fast_pattern; http.header; content:"|20|Java/1"; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/"; classtype:bad-unknown; sid:2015483; rev:6; metadata:created_at 2012_07_18, confidence High, signature_severity Informational, updated_at 2020_11_16;)