Ethernet disconnects on PC

[nowmat]

Hello. I lose my wired connection to my PC while playing a game. The problem is on my end, not the game server's and it happens every day.
I have also experienced disconnections from the network while watching streams.

Filtering is disabled, PC is set as PlayStation. SmartBosst game priority, I have tested applications/devices and nothing changes.

Wi-Fi does not disconnect at that time on other devices. I also tested turning off Wi-Fi and connecting wired only the PC, and the issue persists.

This happens on software versions 4.0.540 and 4.0.645.

I set the PC's IP address to DMZ, but it didn't help.

I performed a hard reset, but it did not help.

The log is attached; the disconnection begins at 10:51.

In the taskbar, at the moment of disconnection, the tray shows as if I had removed the cable.

I plugged the Ethernet cable into another port, but it did not change anything; the disconnections continue.

When I'm not gaming and just browsing the internet, everything works fine, but when the load is moderately higher, such as when gaming, it disconnects.

What else can I do?

 

R3_2025-11-13T10_58_03.153Z_logs.txt

[Netduma Fraser]

Don't ever put your PC in the DMZ, it is a major security risk, remove it if you still have it set. Go to Settings > DHCP > Add Rule > Select PC and save. Also in DHCP settings set the lease to 10,000. Make those changes, reboot the router from the interface and see if it happens again.

[nowmat]

Yes, I know, I disabled DMZ immediately after testing.

I always had IP reservations enabled.

I will now try the third tip and let you know if it works.

[nowmat]

I wasn't disconnected today.

Entering 10,000 I suppose helped. Thank you.

[Netduma Fraser]

Good to hear, thanks for the update. If that is the cause then you may notice it once per week but it should restore itself.

[nowmat]

Unfortunately, I praised it too soon, it keeps disconnecting.

I forgot to add that this always happens at the beginning when I start playing, I reset it and it works, but then it happens again.

This morning, before playing, I reset it after entering 10,000.

An hour ago, I played again and there are disconnections again.

 

Log 18:19 Disconnections are starting to occur. Any other ideas what might be causing this?

R3_2025-11-15T19_07_54.522Z_logs.txt

[Netduma Fraser]

Could you connect your PC via ethernet directly to your modem and then try playing and see if you get the same issue please?