PPTP

PPTP:
  Firmware: 1
  Hostname: 235
  Vendor: MikroTik

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