alert tcp $EXTERNAL_NET any -> $HOME_NET 445 (msg:"GPL NETBIOS SMB-DS too many stacked requests"; flow:to_server,established; content:"|FF|SMB"; pcre:"/^\x00.{3}\xFFSMB(\x73|\x74|\x75|\xa2|\x24|\x2d|\x2e|\x2f).{28}(\x73|\x74|\x75|\xa2|\x24|\x2d|\x2e|\x2f)/"; byte_jump:2,39,little; content:!"|FF|"; within:1; distance:-36; classtype:protocol-command-decode; sid:2102951; rev:3; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)