DNS Security Check is a straightforward SIEM Use Case that easily finds DNS Misconfigurations and anomalies in corporate networks. Despite its maturity and long history, DNS protocol was not designed with security in mind and thus has many means of malicious exploitation. Methods to transfer non-DNS data over the protocol are called DNS tunneling and allow to obfuscate and transmit botnet C2 traffic or slowly exfiltrate data. DNS Security Check is the first and easy step towards DNS security in any organization. It detects, provides visual display and automatic alerts on the DNS packets addressed to non-corporate DNS servers, unusually large DNS packet sizes, and even potential Fast-Flux DNS botnet traffic. Many threats related to DNS protocol abuse can be mitigated by secure network design, which is reflected in the CISO brief for this Use Case.

Minimum Requirements

Log Sources:

  • Firewall Logs: Cisco ASA; Cisco FWSM; CheckPoint Firewall; Palo Alto; Others
  • Proxy Logs: Squid; BlueCoat Proxy; Microsoft Forefront TMG; Others
  • IPS/IDS Logs: TippingPoint; Snort; CheckPoint IPS; Suricata; Others

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DNS Security Check 1.3
502.4 KB
Oct 2, 2017
More info Less info
Product compatibility
Version 6.11.0 · 6.9.1
Version 7.0 · 7.2 · 7.3 · 7.1 · 7.4 · 7.5 · 7.6 · 7.7 · 7.8
ESM Express
Version 6.9.1
Release notes

Version 1.3

    ✓Added SOC Dashboard

    ✓Added IP Flow events

    ✓Added “DNS Denied” panel to dashboards

Version 1.2

    ✓Added detection of large DNS requests

    ✓Added detection of potential Fast flux DNS

Version 1.0

    ✓Initial version.


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release-rel-2024-5-1-6148 | Wed May 8 00:58:25 PDT 2024