> For the complete documentation index, see [llms.txt](https://docs.fusion.vectra.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fusion.vectra.ai/detection-models/library/misconfiguration/external_kerberos_access.md).

# external\_kerberos\_access

**Explanation**

This security event is triggered by Netography Fusion Portal when it detects non-customer network access of Kerberos resources. Kerberos is a network authentication protocol used by many enterprises to securely authenticate users and services across a network. Unauthorized external access to Kerberos resources can indicate a potential security threat.

**What to Look For**

To examine the results of external\_kerberos\_access, look for unauthorized external access to Kerberos resources. This can include attempts to authenticate to a Kerberos server or access to Kerberos tickets. Investigate any suspicious activity on the network or endpoint that may suggest a possible security breach.

If external\_kerberos\_access is triggered, it is essential to investigate the issue to prevent potential security breaches. Check network logs, Kerberos server logs, and endpoint logs for evidence of unauthorized activity. This service should not be accessible from non-local network resources.

**Related MITRE ATT\&CK Categories**

[Initial Access, Persistence: External Remote Services, Technique T1133 - Enterprise](https://attack.mitre.org/techniques/T1133)


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