Short intro and related topics:
One of the reason why UPnP (Universal Plug and Play) is enabled in our devices is because ONVIF uses this to scan the ONVIF device in the network. If you don’t need to scan ONVIF devices in the network using ONVIF method, you can switch of the SSDP Discovery Service.
1) Solution for UPnP: please disable this in the camera settings, if not used
2) The broadcast discovery address, for example: "126.96.36.199", cannot be changed. Only the discover port can be configured.