Problems accessing home network web pages - Router DNS issue?

Abstract: A user is experiencing issues accessing certain web pages on their local network, which includes a server running Ubuntu 20.05 on a Raspberry Pi. The Ubuntu server runs an Apache server, and the affected web pages are accessible locally on 'localhost' (mainly dev/public...). This article aims to troubleshoot potential DNS issues that may be causing the problem.

Created: 2025-01-20 by UserComp.com Editors

Title: Resolving Router DNS Issues with a Ubuntu 20.04 Server on Raspberry Pi

In this article, we will discuss a common issue faced when using a local network that includes a server running Ubuntu 20.04 on a Raspberry Pi. The server runs Apache to serve certain web pages on localhost (mainly dev/public...). However, the router DNS is causing problems, and we will provide a solution to this issue.

Understanding the Problem

When you try to access the web pages on your local network, you may encounter issues due to the router's DNS. The router might not be correctly resolving the domain names to the IP addresses of the devices on your network. As a result, you may not be able to access the web pages served by your Ubuntu server on Raspberry Pi.

Identifying the Problem

To identify if the router DNS is causing the issue, you can try accessing the web pages using the IP address instead of the domain name. If you can access the web pages using the IP address, it confirms that the router DNS is the cause of the problem.

Resolving the Problem

To resolve the router DNS issue, you can set a static IP address for your Raspberry Pi and configure the DNS settings on your router to point to the static IP address of your Raspberry Pi. Here's how you can do it:

Setting a Static IP Address on Raspberry Pi

Open the terminal on your Raspberry Pi and run the following commands:
```
sudo nano /etc/network/interfaces
```
Edit the file and replace the DHCP-managed settings with static IP settings. Here's an example:
```
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 192.168.1.100
netmask 255.255.255.0
gateway 192.168.1.1
```
Save and close the file, then restart the network service:
```
sudo service networking restart
```
Configuring DNS Settings on Router

Log in to your router's administration interface and find the DNS settings. Add a new DNS server entry with the IP address of your Raspberry Pi (192.168.1.100 in this example). Save the changes and reboot the router.

Testing the Solution

Now, you should be able to access the web pages on your local network using the domain name. If you still face issues, try clearing your browser's DNS cache or use a different browser.

References

This article provides a solution to a common problem faced when using a local network that includes a server running Ubuntu 20.04 on a Raspberry Pi. By setting a static IP address for the Raspberry Pi and configuring the DNS settings on the router, you can resolve router DNS issues and access the web pages on your local network.

Tags: Linux Networking Raspberry Pi Apache Ubuntu

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