GPL DNS named version attempt

Query · suricata

flow:to_server,established;
content:"|07|version"; offset:12; nocase;
content:"|04|bind|00|"; offset:12; nocase;
Raw source GPL DNS named version attempt · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET any -> $HOME_NET 53 (
    msg:"GPL DNS named version attempt";
    flow:to_server,established;
    content:"|07|version"; offset:12; nocase;
    content:"|04|bind|00|"; offset:12; nocase;
    reference:arachnids,278;
    reference:nessus,10028;
    classtype:attempted-recon;
    sid:2100257; rev:10;
    metadata:created_at 2010_09_23, signature_severity Informational, updated_at 2019_07_26;
)

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