How to configure DHCP Server in centos 7 – (Complete Server & client)
How to configure DHCP Server in centos 7 – (Complete Server & client)
What is DHCP Server ?
DHCP (Dynamic Host Configuration Protocol) is a network protocol that enables a server to automatically assign an IP address and provide other related network configuration parameters to a client on a network, from a pre-defined IP pool.
This means that each time a client (connected to the network) boots up, it gets a “dynamic” IP address, as opposed to “static” IP address that never changes. The IP address assigned by a DHCP server to DHCP client is on a “lease”, the lease time can vary depending on how long a client is likely to require the connection or DHCP configuration.
In this tutorial, we will cover how to install and configure a DHCP server in CentOS/RHEL and Fedora distributions.
Testing Environment Setup
We are going to use following testing environment for this setup.
DHCP Server – CentOS 7
DHCP Clients – Windows 10
How Does DHCP Work?
Before we move any further, let’s briefly explain how DHCP works:
When a client computer (configured to use DHCP) and connected to a network is powered on, it forwards a DHCPDISCOVER message to the DHCP server.
And after the DHCP server receives the DHCPDISCOVER request message, it replies with a DHCPOFFER message.
Then the client receives the DHCPOFFER message, and it sends a DHCPREQUEST message to the server indicating, it is prepared to get the network configuration offered in the DHCPOFFER message.
Last but not least, the DHCP server receives the DHCPREQUEST message from the client, and sends the DHCPACK message showing that the client is now permitted to use the IP address assigned to it.
All commands :
su
yum install dhcp
vim /etc/sysconfig/dhcp
mv /etc/dhcp/dhcpd.conf /etc/dhcp/dhcpd.conf.backup
systemctl enable dhcpd
systemctl restart dhcpd
firewall-cmd –permanent –zone=public –add-service=dhcp
firewall-cmd –reload
vim /etc/sysconfig/network-scripts/ifcfg-enp0s3
service network restart
service dhcpd restart
dhcp configureations :
option domain-name “example.com”;
authoritative;
subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.100 192.168.1.150;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.1.1;
option domain-name-servers 8.8.8.8;
default-lease-time 600;
max-lease-time 7200;
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#InstallDHCPinCentos #DHCP #Centos7
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