Rule History

alert udp $HOME_NET any -> any 53 (msg:"ET DNS Non-DNS or Non-Compliant DNS traffic on DNS port Reserved Bit Set"; content:!"7PYqwfzt"; depth:8; content:!"r6fnvWj8"; depth:8; byte_test:1,&,64,3; threshold: type limit, count 1, seconds 120, track by_dst; reference:md5,a56ec0f9bd46f921f65e4f6e598e5ed0; reference:url,vrt-blog.snort.org/2008/08/checking-multiple-bits-in-flag-field_29.html; classtype:policy-violation; sid:2014703; rev:14; metadata:created_at 2012_05_04, performance_impact Significant, signature_severity Minor, updated_at 2022_11_03;)