alert udp any any -> $HOME_NET 1900 (msg:"ET DOS Possible SSDP Amplification Scan in Progress"; content:"M-SEARCH * HTTP/1.1"; content:"ST|3a 20|ssdp|3a|all|0d 0a|"; nocase; distance:0; fast_pattern; threshold:type both,track by_src,count 2,seconds 60; reference:url,community.rapid7.com/community/metasploit/blog/2014/08/29/weekly-metasploit-update; classtype:attempted-dos; sid:2019102; rev:1; metadata:created_at 2014_09_03, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)