The Dynamic Host Configuration Protocol (DHCP) is a network management protocol used to automate the process of configuring devices on IP networks. In this guide, we will walk you through the steps to install and configure a DHCP server on Ubuntu 20.04.

Step 1: Update Your System

Start by ensuring your system is up to date. Open your terminal and run the following commands:

sudo apt update && sudo apt upgrade -y

Step 2: Install DHCP Server

Next, install the DHCP server package:

sudo apt install isc-dhcp-server -y

Step 3: Configure DHCP Server

Edit the DHCP server configuration file:

sudo nano /etc/dhcp/dhcpd.conf

In this file, add the following configuration to define the subnet and range of IP addresses:

subnet 192.168.1.0 netmask 255.255.255.0 {
        range 192.168.1.10 192.168.1.50;
        option routers 192.168.1.1;
        option subnet-mask 255.255.255.0;
        option domain-name-servers 8.8.8.8, 8.8.4.4;
        option domain-name "local";
    }

Step 4: Specify the Interface

Specify the network interface that the DHCP server should listen on. Open the following file:

sudo nano /etc/default/isc-dhcp-server

Find the line that starts with INTERFACES and set it to your network interface:

INTERFACES="eth0"

Replace eth0 with your actual network interface name, which you can find using the command ip a.

Step 5: Restart the DHCP Server

Now, restart the DHCP server to apply the changes:

sudo systemctl restart isc-dhcp-server

You can check the status of the DHCP server using the following command:

sudo systemctl status isc-dhcp-server

Step 6: Allow DHCP through the Firewall

If you have UFW enabled, allow DHCP traffic:

sudo ufw allow 67/udp

Conclusion

You have successfully installed and configured a DHCP server on Ubuntu 20.04. This setup will allow devices in your network to receive IP addresses automatically. If you require reliable hosting solutions, consider Windows VPS UK for your server needs.

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