Fritzbox Routers Suppressing DNS Lookups: A Strange DNS Problem Solved

Introduction

In today's digital world, having a reliable home network is essential for many applications, such as working from home, online gaming, and streaming media. One common issue that may arise in such networks is a strange DNS problem when using a Fritzbox router, a PC, and a Wi-Fi home server connected via UPC cable box in a NAT configuration. This article aims to help you solve this issue by explaining how to suppress DNS lookups on Fritzbox routers.

Understanding the Problem

When using a Fritzbox router, a PC, and a Wi-Fi home server connected via UPC cable box in a NAT configuration, you might encounter a strange DNS problem. The issue arises when the Fritzbox router performs DNS lookups for the internal IP address of the Wi-Fi home server, which can lead to various connectivity issues.

Configuring DuckDNS Point for Internal IP Address

To resolve this issue, you can configure a DuckDNS point for the internal IP address of your Wi-Fi home server. DuckDNS is a free, easy-to-use dynamic DNS service that allows you to assign a domain name to your router's public IP address. By using DuckDNS, you can access your internal servers using a consistent domain name, even if your public IP address changes.

Setting Up DuckDNS

To set up DuckDNS, follow these steps:

1. Go to https://www.duckdns.org/ and sign up for a free account.
2. Log in to your account and go to the "Hosts" tab. Click on the "Add" button to add a new host.
3. Enter a descriptive hostname, such as "homeserver," and select a TLD (top-level domain) for your new host.
4. In the "IPv4 Address" field, enter the public IP address of your Fritzbox router.
5. Click the "Save" button to save your new host.

Configuring Fritzbox Router to Use DuckDNS

To configure your Fritzbox router to use the DuckDNS domain name instead of the internal IP address for DNS lookups, follow these steps:

6. Log in to your Fritzbox router's web interface.
7. Go to the "Network" tab and click on "Addresses."
8. Find the address of your Wi-Fi home server and click on the "Edit" button.
9. In the "DNS server" field, enter the IP address of a public DNS server, such as 8.8.8.8 or 8.8.4.4.
10. In the "Hostname" field, enter the DuckDNS domain name you created earlier, such as "homeserver.duckdns.org."
11. Click the "Apply" button to save your changes.

In this article, we have discussed a strange DNS problem that can occur when using a Fritzbox router, a PC, and a Wi-Fi home server connected via UPC cable box in a NAT configuration. We have explained how to solve this issue by configuring a DuckDNS point for the internal IP address of your Wi-Fi home server and configuring your Fritzbox router to use the DuckDNS domain name for DNS lookups.