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I have a Synology RT1900ac router with DNS server. It has only one local master forward zone. Really simple one with a few entries, I just followed this guide. It was working fine until the latest router firmware and DNS Server package update. After a few hours the DNS server stops responding to queries. I need to restart the router and DNS responds again, but only working for a while. Restarting the package or reinstalling doesn't help, only restart does.

This issue is quite similar to this one: link.

I've opened a ticket at Synology, waiting them to reply. Do you have any idea how can I debug or how to fix it?

Balur
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2 Answers2

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If anyone will have this issue again. I'm just here again to let you know what the Support Engineer said to me.

"Safe Access in combination with the DNS Server can cause that the DNS Server cannot be used properly anymore."

Stop Safe Access package through the Package Center, I hope this will help you too.

Balur
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I had the same issue with build SRM 1.2-7742 Update 2.

Stopping safe access package worked !

apo
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  • I have that version too (currently the latest release). The devs knows the problem, and will be fixed with an upcoming update for the SRM (no exact release date available). – Balur Oct 30 '18 at 06:19