> 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/reconnaissance/portscan.md).

# portscan

**Explanation**

Port scanning is a common technique used by attackers to identify vulnerabilities in a network.

**What to Look For**

When analyzing the results of this NDM event, look for unusual traffic patterns that may indicate port scanning activity. This could include a high number of consecutive connection attempts to different ports or protocols from a single IP address or a sudden burst in network traffic. To remediate, investigate the source of the traffic and determine if it is legitimate or malicious.

**Related MITRE ATT\&CK Categories**

[Discovery: Network Service Discovery, Technique T1046 - Enterprise](https://attack.mitre.org/techniques/T1046)

[Reconnaissance: Active Scanning, Technique T1595 - Enterprise](https://attack.mitre.org/techniques/T1595)


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