SynologyTips DNS name resolution not working anymore after Package update

After updating my Synology with the latest version of the DNS Server, this one was not resolving my domain names anymore. I had to reset to “resolution service” to solve that issue.

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To access my blog, hosted on my NAS, from my intranet but using its public domain name, I had to define the same domain name on my DNS Server, with A records pointing to the NAS’ IP… (see details here).

When my DNS Server does not run anymore, trying to access my blog from my intranet, using its domain name, I get the web page of my ADSL Modem. Is IP address is indeed the one obtained when resolving my domain name using a public DNS Server.

To check if my DNS Server runs fine, I simply had to run a dos cmd prompt and type ping www.beatificabytes.be. If I get the local IP of my NAS, it works fine. If I get the public IP of my ADSL modem, there is something wrong…

It’s not the first time that I have this issue after updating my DSM or the DNS Server. But each time, the solution is the same: I have to uncheck and recheck the options “Enable resolution services” in my Synology’s “Control Panel > DNS Server > Resolution” settings.

NB.: I have next to reboot my mobile devices. on PC, possibly execute “ipconfig /release” and then “ipconfig /renew” in a command prompt.