This Pi-KVM device has running kvmd-vnc daemon and provides VNC port (default 5900) for alternative access to the server other than the web interface.
WARNING! We strongly don't recommend you to use VNC in untrusted networks. The current implementation does not use encryption, and your passwords are transmitted over the network in a plain text.
Your VNC client must support Tight JPEG compression, password authentication and allow connection without encryption. TigerVNC is a good choice.