Guide: Manual Installation of Technitium DNS (.NET v10.0.7) on Arch Linux / CachyOS / Arch-based systems

[daedaevibin]

I’ve noticed that the current AUR packages for Technitium and the .NET SDK are consistently out of date (OOD). While official repositories might offer 10.0.4 or CachyOS repositories specifically offer 10.0.6, the actual latest LTS is 10.0.7 (specifically .NET 10.0.203).

version 10.0.7/10.0.203 of the .NET SDK is required for Technitium version 15.0+.

To bypass these versioning bottlenecks and ensure system stability, I’ve moved to a manual installation flow. Below is the process for installing the required dependencies and setting up the service with proper permissions.

Important

Note:
Many thanks to @ShreyasZare for making this incredible piece of software!

Service Configuration

I have heavily edited the systemd service file to improve reliability. You can find the original at /opt/technitium/dns/systemd.service, but I recommend using my hardened version attached below.

Important

Replace /home/dae/.dotnet/dotnet in the service file with the correct path for your specific system or user (e.g., /home/<user>/.dotnet/dotnet).

Use this file at your own discretion.

• systemd-service.txt
  (Note: the .service extension was just replaced with .txt)

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1. Prerequisite: Backup Existing Settings

Before starting the installation, ensure you have your current configuration saved.

1. Access your current Web Dashboard (usually http://localhost:5380).
2. Navigate to Settings.
3. Scroll to the bottom of the page.
4. Select Backup Settings on the bottom right. (I suggest also selecting the Log Files (*.log) option.)
5. It will download a .zip file. Do not extract or modify this file, it will be used later.

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2. Installing Dependencies

This approach ensures you are running the latest binaries regardless of repository lag.

Install the .NET SDK

## Download the install script
curl -L [https://dot.net/v1/dotnet-install.sh](https://dot.net/v1/dotnet-install.sh) -o dotnet-install.sh

## Set executable permissions
chmod +x dotnet-install.sh

## Run the installer
./dotnet-install.sh

Install Technitium DNS

The binaries will be located at /opt/technitium/dns/ once the script finishes.

curl -sSL [https://download.technitium.com/dns/install.sh](https://download.technitium.com/dns/install.sh) | sudo bash

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3. System Integration & Permissions

After replacing the systemd.service file with your edited version, you need to link it to the system and secure the directories.

Symlink the Service

sudo ln -sf /opt/technitium/dns/systemd.service /usr/lib/systemd/system/technitium-dns-server.service

Important

I heavily recommend running sudo chattr +i /opt/technitium/dns/systemd.service to prevent updates from erasing the edits.
Once doing so, you will need to replace +i with -i to edit the file further.

Ownership & Hardening

Ensure that root owns the necessary directories to prevent unauthorized modifications.

sudo chown -R root:root /opt/technitium/dns /etc/dns /var/log/technitium

Enable the Service

sudo systemctl enable --now technitium-dns-server

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4. Restore Configuration

Once the new service is running, apply your saved settings.

1. Go to the new Web Dashboard.
2. Navigate to Settings and scroll to the bottom of the page.
3. On the bottom right, select Restore Settings (located next to the Backup button).
4. Upload the .zip file you downloaded in Step 1. (I suggest also selecting the Log Files (*.log) option.)

This workflow has proven much more reliable for me than waiting on AUR updates.