:5900
(TCP)
High Risk
VNC
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TCP — Remote Access
Port Overview
Port Number
5900
Service Name
VNC
Transport Protocol
TCP
Category
Remote Access
Security Risk
High
Port Range
Registered (1024-49151)
What is Port 5900?
Virtual Network Computing. Provides graphical remote desktop access using the RFB (Remote Framebuffer) protocol. Cross-platform but often unencrypted by default.
TCP
Remote Access
Commonly Used
Security Considerations
Port 5900 (VNC) is classified as high risk. This port is a common target for automated scanning and brute-force attacks. If you must expose it, restrict access to known IP addresses.
Recommendation: Use firewall rules to whitelist trusted IPs. Enable rate limiting and intrusion detection.