HTTP/1.1 407 OK
Date: Wed, 20 Jan 2021 05:55:41 GMT
Content-Type: text/plain; charset=utf-8
Content-Length: 32
Connection: keep-alive

please add white ip 224.29.5.228

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