@Ivaylo 

now remember that last night my kids watch a movie from NAS .. so the QNAP is not a problem device.

I will change the router place and disable the firewall ... last night firewall was off.
now I think that this is some config issue.

Best wishes from Sofia

@Ivaylo
2 reboots in the last 1 h .. it's not heating. I move the router to 3 new positions.

Is there a way to see old logs before the system clears them?
This is not my first router and I'm sure in my settings.

what screen to share?

@Ivaylo 

Thanks for the advice.

I change last night's settings. The router starts to reboot itself again when NAS is connected.

I really think that this is not a wifi problem. My kid is in an online class and there is no problem (if NAS is not connected).

I will keep NAS disconnected for a day for the test.

this is my settings:






best,
T.

@Kevin_Z 

Dear Kevin,

First of all my IPS provider is A1 Bulgaria EAD. I am using same provider since almost 20 years. 

I am attaching the picture during the fault.

The problem is valid not only for wireless connection, wired also have troubles. In addition, during this issue I cannot connect to my router via cable connection or wireless.

I've switched to WPA/WPA2 instead of WPA2/WPA3 and will test. 

Furtheremore, old C20i has better wifi range than this one. Both was set on same place.

@Ivaylo 



My ISP is Net1 in Sofia. NAS is in LAN4 connected.
I have stopped all services in NAS - only Microsoft networking and web interface itself for administration.

I start thinking again that the problem is in communication with NAS .. when restarting NAS on the first NAS beep the router is reboots .. after 10-sec router is back .. and on NAS next beep for starting the same reboot again ..

I really don't know how to detect this problem .. but i need to use this NAS :)

I changed cables and ports same situation.