Rule History

alert udp any any -> any 123 (msg:"ET DOS Possible NTP DDoS Inbound Frequent Un-Authed GET_RESTRICT Requests IMPL 0x02"; content:"|00 02 10|"; offset:1; depth:3; byte_test:1,!&,128,0; byte_test:1,&,4,0; byte_test:1,&,2,0; byte_test:1,&,1,0; threshold: type both,track by_dst,count 2,seconds 60; reference:url,community.rapid7.com/community/metasploit/blog/2014/08/25/r7-2014-12-more-amplification-vulnerabilities-in-ntp-allow-even-more-drdos-attacks; classtype:attempted-dos; sid:2019021; rev:3; metadata:created_at 2014_08_26, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)