alert tcp $EXTERNAL_NET any -> $HOME_NET 79 (msg:"GPL SCAN Finger / execution attempt"; flow:to_server,established; content:"/"; pcre:"/^\x2f/smi"; reference:cve,1999-0612; reference:cve,2000-0915; classtype:attempted-recon; sid:2103151; rev:5; metadata:created_at 2010_09_23, signature_severity Informational, updated_at 2019_07_26;)