ET INFO Session Traversal Utilities for NAT (STUN Binding Response)

Query · suricata

xbits:isset,ET.STUN,track ip_dst;
content:"|01 01|"; depth:2;
content:"|21 12 a4 42|"; fast_pattern; distance:2; within:4;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET INFO Session Traversal Utilities for NAT (STUN Binding Response) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp $EXTERNAL_NET 3478 -> $HOME_NET any (
    msg:"ET INFO Session Traversal Utilities for NAT (STUN Binding Response)";
    xbits:isset,ET.STUN,track ip_dst;
    content:"|01 01|"; depth:2;
    content:"|21 12 a4 42|"; fast_pattern; distance:2; within:4;
    reference:url,tools.ietf.org/html/rfc5389;
    classtype:misc-activity;
    sid:2016150; rev:4;
    metadata:created_at 2013_01_04, deployment Perimeter, deployment alert_only, confidence High, signature_severity Informational, updated_at 2026_06_01;
)

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.