RealVNC Personal

RFB 004.000

VNC:
  Protocol Version: 4.0
  Security Types:
    5: RA2
    7: RealVNC

HTTP/1.1 500 Internal Server Error
SERVER: Linux/2.6.21.5, UPnP/1.0, Portable SDK for UPnP devices/1.6.6
CONNECTION: close
CONTENT-LENGTH: 60
CONTENT-TYPE: text/html