FritzBox: Set a fixed IP address for the device

Fixed IP address for certain devices in the home WLAN, that’s how it works.

After I had set up Wireguard and wanted to test it on the road, I noticed that I didn’t know the IP address of my computer for remote access on the road. With Tailscale it is not a problem, here I can simply check in the app which IP addresses the other devices currently have.

In my case it was easy after all, as the IP address was 192.168.178.20 and therefore quite easy to remember. Normally, the IP addresses are assigned dynamically by the Fritzbox. This means that the device logs on and is automatically assigned an IP address from a defined range.

According to my observations, the respective device keeps the IP address or gets it assigned again and again, provided it logs on regularly. However, this is not guaranteed.

Setting a fixed IP address for a device

The Fritzbox itself offers the possibility to assign a fixed IP address to a device. To do this, we open the settings. Here we click on “Network”. Here we see a long or short list of devices that are currently registered or used to be. We now find the device and edit it.

In the settings for the IP address, we can now define this and also set the check mark that the device should always be assigned this address.

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