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Public service exposure

Remote desktop open to the internet

Whether the Remote Desktop (RDP, 3389) or VNC (5900) port accepts a connection from the internet.

Part of the External Security Check. Free during the preview.

What it checks

Whether the Remote Desktop (RDP, 3389) or VNC (5900) port accepts a connection from the internet.

A pass means: No remote desktop ports accept connections from the internet.

Possible findings

Remote desktop port reachable from the internet

Severity: MediumConfidence: Medium confidenceKind: Security issue

What we found

A remote desktop port (RDP or VNC) accepted a connection from the internet.

Why it matters

Internet-facing remote desktop services are one of the most common ways ransomware gets in, through stolen passwords or unpatched flaws.

How to fix it

Put remote desktop behind a VPN or a gateway with multi-factor authentication, and close the port to the internet.

References