Port
Port 5900 — VNC
Port 5900 (TCP) is used by VNC. Virtual Network Computing — remote desktop.
Port 5900 at a glance
| Property | Value |
|---|---|
| Port number | 5900 |
| Transport | TCP |
| Service | VNC |
| Category | Registered port |
What it is used for
Virtual Network Computing — remote desktop.
Security considerations
Weak default auth; tunnel over SSH/VPN.
See our full TCP/UDP port reference and learn how firewalls filter ports in the CyberOps course.
Frequently asked questions
What is port 5900 used for?
Port 5900 (TCP) is used by VNC. Virtual Network Computing — remote desktop.
Is port 5900 TCP or UDP?
Port 5900 uses TCP.
Is it safe to open port 5900?
Weak default auth; tunnel over SSH/VPN.
Related
Learn networking hands-on
Master IP addressing, subnetting and Cisco configuration on real lab devices with placement support at Attila Technologies, Ahmedabad.