Allgemeines Diskussions-Forum » Intermittent DNS problem with domain

Hello,

All of the computers on the network are set to get DNS from the domain controller computer. Since changing routers, we get intermittent DNS failures. Some web sites won't appear sometimes, but will later. It's seemingly random. Restarting the router usually fixes the problem temporarily, but it always comes back.
The hardware and firmware are not the problem - I've replaced the hardware once and upgraded the firmware. I've also tried various other configurations - changing the DNS settings in the router, the domain controller and on network computers, but nothing seems to fix the problem. There must be something I'm missing here. Anyone have any experience or insight into what may be wrong?

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:
https://arstechnica.com/civis/viewtopic.php?f=10&t=111260
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Thank you.