ET DNS Non-DNS or Non-Compliant DNS traffic on DNS port Reserved Bit Set

SID: 2014703Rev: 1414 views
History
Sourceet/open
CreatedMay 4, 2012
UpdatedNovember 3, 2022
Classificationpolicy-violation
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;)

References

md5
a56ec0f9bd46f921f65e4f6e598e5ed0
Google SearchBrave Search
urlvrt-blog.snort.org/2008/08/checking-multiple-bits-in-flag-field_29.html

Metadata

created at2012_05_04
performance impactSignificant
signature severityMinor
updated at2022_11_03

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