5800,5801,5900,5901 - Pentesting vnc

VNC stands for Virtual Network Computing and refers to a technology that allows users to access and control a computer remotely over the internet or a local network. VNC provides a graphical user interface (GUI) to the remote computer, allowing the user to view and interact with the desktop as if they were physically present in front of the computer.

nmap

nmap -sV -Pn -p 5800,5801,5900,5901 $IP
nmap -sV -sC -Pn -p 5900 $IP

nmap --script vnc-brute -p 5900 $IP
nmap -sV -Pn --script vnc-info,realvnc-auth-bypass,vnc-title -p 5900 $IP

telnet

telnet $IP 5900

netcat

netcat $IP 5900

vncviewer

connect

vncviewer $IP:5900

xtightvncviewer

connect

xtightvncviewer $IP