How to change the priority of Internet traffic distribution for a PC that is connected via cable?

Question

Computer networks

The problem is that when you connect a computer to a router via a cable, the speed of the Internet over Wi-Fi decreases. Previously, the Internet simply disappeared (the Wi-Fi signal itself remained in place), but after changing the router to a more expensive one, the speed, namely the return, just started to drop dramatically, while the download speed remains the same in any case. Shows that the upload speed of the PC is only 1.5-2mb.
Internet speed under the contract gigbytes / sec.
Router Archer C6 AC1200.
PS In the router settings I found QoS which you can set priorities, but it did not help.
PS2 The PC that is connected via cable is running on a Windows server, and the DMZ mode is enabled in the router settings. But as far as I remember, before this problem was also with other PCs.
PS3 The upload speed drops both by 2.4 hertz and by 5 hertz to almost 0 mb / s

Answer 1

See who ddoes you through the dmz.... Putting the windu
outside.... in the dmz is a tin.
There, by chance, the bottom of the server is not raised?

Answer 2

The PC that is connected via cable runs on a Windows server, and the DMZ mode is enabled in the router settings.

SSZB. Someone felt you and is trying to break you, for example, via RDP. Why windu naked #oops in tyrnet?