alert tcp $EXTERNAL_NET any -> $HOME_NET 32000 (msg:"GPL DELETED Xtramail Username overflow attempt"; flow:to_server,established; dsize:>500; content:"Username|3A|"; nocase; isdataat:100,relative; pcre:"/^Username\:[^\n]{100}/smi"; reference:bugtraq,791; reference:cve,1999-1511; reference:nessus,10323; classtype:attempted-admin; sid:2101636; rev:11; metadata:created_at 2010_09_23, signature_severity Unknown, updated_at 2019_07_26;)