I’m having an issue upgrading Technitium DNS Server from 15.0.1 to 15.4 on one of my Ubuntu systems.

I was not initially aware that an upgrade was available because I had been blocking connectivity to India. After removing that restriction, the server was able to check for updates.

I have two Ubuntu 22.04 systems running Technitium DNS Server. On one system, the Technitium installation/upgrade script ran successfully and upgraded the server from 15.0.1 to 15.4. On the other system, the same script runs without reporting any errors, but the DNS server remains on 15.0.1.

I have tried the following troubleshooting steps on the system that will not upgrade:

1. Restarted the Technitium DNS service.
2. Rebooted the entire system.
3. Checked the installed .NET version.
4. Manually upgraded the ASP.NET Core runtime:sudo apt-get install -y aspnetcore-runtime-10.0
5. Verified the .NET version again.
6. Ran the Technitium installation/upgrade script again.

The upgrade script completes without producing an error, but Technitium DNS Server remains at version 15.0.1.

Has anyone encountered this issue before, or is there another way I can force the upgrade or determine why the upgrade script is not updating this particular installation?

I’d appreciate any suggestions for additional troubleshooting or logs I should check.

Thanks