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How to confiugre a Linux DHCP relay server
DHCP (Dynamic Host Configuration Protocol) simplifies network management by automatically assigning IP addresses, gateways, DNS servers and many other options to devices. It saves time, minimizes errors, and prevents IP conflicts.
A Linux-based DHCP server is ideal because it is stable, flexible, secure, and free. With open-source solutions like ISC DHCP, it can be customized for both small and large networks, making administration efficient and cost-effective.
Step 1: Update and Upgrade
sudo apt update && sudo apt upgrade -y Step 2: Install ISC-DHCP-RELAY
sudo apt install isc-dhcp-relay -yStep 3: Run the DHCP relay command
Hint use command “ip address” to see a list of all interfaces
# Change whats within the <>
dhcrelay -i <interface_towards_clients> <ipaddress_of_DHCP_server>Step 4: Copy DHCP files to system location
cp /lib/systemd/system/isc-dhcp-relay.service /etc/systemd/system/isc-dhcp-relay.service
cp /lib/systemd/system/isc-dhcp-relay6.service /etc/systemd/system/system/isc-dhcp-relay6.service
Step 5: Restart and verify ISC-DHCP-SERVER Service
sudo systemctl start isc-dhcp-relay
sudo systemctl status-dhcp-relay