ET DNS Non-DNS or Non-Compliant DNS traffic on DNS port Opcode 6 or 7 set

SID: 2014701Rev: 1420 views
History
Sourceet/open
CreatedMay 4, 2012
UpdatedJuly 2, 2024
Classificationpolicy-violation
alert udp $HOME_NET !9987 -> $EXTERNAL_NET 53 (msg:"ET DNS Non-DNS or Non-Compliant DNS traffic on DNS port Opcode 6 or 7 set"; content:!"7PYqwfzt"; depth:8; content:!"r6fnvWj8"; depth:8; byte_test:1,!&,64,2; byte_test:1,&,32,2; byte_test:1,&,16,2; 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:2014701; rev:14; metadata:created_at 2012_05_04, deprecation_reason Performance, signature_severity Informational, updated_at 2024_07_02;)

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
deprecation reasonPerformance
signature severityInformational
updated at2024_07_02

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