ET POLICY Possible HTTP-TUNNEL detected

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/index.html?crap"; startswith; fast_pattern;
threshold:type limit, track by_src,count 5, seconds 30;
Raw source ET POLICY Possible HTTP-TUNNEL detected · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET POLICY Possible HTTP-TUNNEL detected";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/index.html?crap"; startswith; fast_pattern;
    threshold:type limit, track by_src,count 5, seconds 30;
    classtype:policy-violation;
    sid:2030886; rev:1;
    metadata:created_at 2020_09_17, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.