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Joined: Sat Jan 23, 2021 11:07 am

Reoccuring DNS Error

Sat Apr 02, 2022 12:56 pm

Hi Guys,

I own a RB2011L with FW 6.49.5. I spent a lot of time to understand DNS Settings within the routerboard and my descion was clear to use DoH to secure my DNS Traffic. Also I had set up a DNS Interception rule to push all my clients back to use the routers DNS Settings.

It works like charm but from time to time, I get those strange errors:

"DoH server connection error: Network is unreachable" or
"DoH server connection error. No route to Network"

But thats not true. My modem works and Internet connection is available. Routing works days and weeks/months bevore just the way it did. When this error occurs, It doesn´t matter if I use DoH or not, or just simple DNS Servers IP. This error occurs from time to time, and there is no reproducing situation I can refer to. Today in the morning from one moment to another DNS stops working, and from that point I am not able to resolve hostnames - neither within my home network nor on the Internet. And puff a few minutes later the problem is gone just almost as it came. Yes I tried to flush the DNS Cache, Reboot and all that stuff. But it´s not really the Solution it should be ? This seems to be a general Problem.

Did anyone have had the same Problems ?

Thanks
Cheers
Tom

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