DHCP Server Ubuntu 15.04: Setting Up and Troubleshooting : cybexhosting.net

Hello there! If you’re reading this, chances are that you’re either setting up a DHCP server on your Ubuntu 15.04 machine or experiencing some issues with an existing setup. This journal article is here to guide you through the process of setting up and troubleshooting a DHCP server on Ubuntu 15.04.

What is a DHCP Server?

A DHCP (Dynamic Host Configuration Protocol) server is a piece of software that assigns IP addresses to devices on a network automatically. This is particularly useful in large networks, where manually assigning IP addresses to each device would be a time-consuming and error-prone process.

The DHCP server receives requests from devices on the network and assigns them an available IP address from a pool of addresses. It also provides other network configuration information, such as the default gateway and DNS server IP addresses.

Why Use a DHCP Server?

Using a DHCP server has several benefits:

Benefit Description
Efficiency Automatically assigning IP addresses saves time and reduces errors compared to manually assigning addresses.
Scalability A DHCP server can easily manage IP addresses for large networks with many devices.
Centralized Management Network configuration can be managed from a central server, rather than on each individual device.

Setting Up DHCP Server on Ubuntu 15.04

Now that we have a basic understanding of what a DHCP server is, let’s get started with setting one up on Ubuntu 15.04. We’ll be using the ISC DHCP server, which is a popular and widely used DHCP server on Linux systems.

Step 1: Installing the DHCP Server

The first step is to install the DHCP server software on your Ubuntu 15.04 machine. This can be done using the apt package manager:

sudo apt-get update
sudo apt-get install isc-dhcp-server

During the installation process, you’ll be prompted to configure the DHCP server. For most users, the default settings will be sufficient. However, if you need to make any changes, this is the time to do so.

Step 2: Configuring the DHCP Server

Now that the DHCP server software is installed, the next step is to configure it to work with your network. The DHCP server configuration file is located at /etc/dhcp/dhcpd.conf. Open this file in a text editor:

sudo nano /etc/dhcp/dhcpd.conf

The configuration file is where you’ll specify the IP address range that the DHCP server should use, as well as other network configuration options. The file is well-documented, so it’s easy to understand what each setting does.

Step 3: Starting the DHCP Server

With the configuration file in place, it’s time to start the DHCP server. This can be done using the following command:

sudo service isc-dhcp-server start

If everything is configured correctly, the DHCP server should start up without any issues.

Troubleshooting DHCP Server on Ubuntu 15.04

While setting up a DHCP server on Ubuntu 15.04 is relatively straightforward, there are some common issues that you may encounter. Let’s take a look at a few of these issues and how to troubleshoot them.

Issue 1: DHCP Server Fails to Start

If the DHCP server fails to start, the first thing to check is the configuration file. Make sure that the file is correctly formatted and that all necessary settings are present. Additionally, check the system log for any error messages related to the DHCP server.

Issue 2: DHCP Server Doesn’t Assign IP Addresses

If the DHCP server starts successfully but doesn’t assign IP addresses to devices on the network, there are a few things to check. First, make sure that the DHCP server has a pool of IP addresses to choose from in the configuration file. Additionally, check the system log for any error messages related to DHCP requests.

Issue 3: DHCP Server Assigns Incorrect IP Addresses

In some cases, the DHCP server may assign incorrect IP addresses to devices on the network. This can be caused by a misconfigured DHCP server or conflicting IP addresses on the network. Check the configuration file to make sure that the IP address range is correct and that there are no conflicting IP addresses on the network.


Setting up and troubleshooting a DHCP server on Ubuntu 15.04 may seem daunting, but with the right knowledge and tools, it can be a straightforward process. By following the steps outlined in this article and using the troubleshooting tips provided, you should be able to set up and maintain a DHCP server with ease.

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