ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

DHCP Server installation and configuration in UBUNTU

Updated on June 14, 2015

What is dhcp server ?

In a large network it is not feasible to assign IP addresses to all the computers manually. DHCP server provides IP addresses to the clients which need it. When a client needs IP address it sends request to the DHCP server in the network. DHCP server checks availablity of IP address in its pool. If free IP adress is available then it assigns that IP address to the client which has requested for it. DHCP server may provide lease time. Once the lease time is over the client has to go for another IP address or the same if it is still free. DHCP server maintains the record of all the clients.

Why UBUNTU ?

UBUNTU is an open source.So many powerful tools are available in it. They can be easily configured and used. Installation is very easy. The interface of UBUNTU is very attractive and very familiar. UBUNTU is available with server and desktop edition.

Before Installing dhcp server ...

First install UBUNTU in the server or computer with the required configuration. UBUNTU 14 LTS is better than its previous releases. Once the OS is installed make sure to update UBUNTU. For that user must be the root or super use. For this follow the following commands:

nareshbaba#sudo su

It will ask for the password. Enter the password and the prompt will comeback again.

nareshbaba#

Now type the following command

nareshbaba # sudo apt-get update

and the update will start

Network Configuration

Before proceeding for dhcp server first we have to setup network. On the right top corner click on "System Setting", then select wired connection. The network dialouge box will open. In that box got to IPv4 and give IP address, subnet and DNS servers. Finally close it and restart the network service or use the following command:

nareshbaba#service networking restart

Now check whether ip is set or not. Issue the following command:

nareshbaba#ifconfig

Installation of DHCP server

Once the Network is configured, we can proceed for installation of dhcp server. This tutorial shows how to install dhcp server with internet connection. So many dhcp packages are available but, we will use isc-dhcp-server. For installation issue the following commands:

nareshbaba#sudo su

nareshbaba#apt-get install isc-dhcp-server


The above command will ask for confirmation. Press 'Y' or 'y'.


Before this be sure to run "apt-get update"


Configuring DHCP server

Once isc-dhcp-server installation is over we have to do some configuration. Issue the following command:

nareshbaba#nano /etc/default/isc-dhcp-server

Now editor will open. Find for INTERFACES and modify it as follows:

INTERFACES="eth0"

Once the change is made, press "CTRL+O", it will ask for confirmation to save the changes. Press y. Then press "CTRL+X", which will exit the editor and the prompt will come back.

Here we are assuming that isc-dhcp-server will use eth0 interfaces to lease IP addresses to the clients.

Now issue the following command:

nareshbaba#cp /etc/dhcp/dhcpd.conf /etc/dhcp/dhcpd.conf.backup

The above command will create a back up of original dhcpd.conf as dhcpd.conf.backup

Now issue the following command:

nareshbaba#gedit /etc/dhcp/dhcpd.conf

Editor will open. Now just to avoid any type of confusion delete everything in that file. and write the following code:

subnet 1.0.0.0 netmask 255.255.252.0
{
   range 1.0.0.11 1.0.0.200;
   option routers 1.0.0.1;
   option domain-name-server 8.8.8.8 4.4.4.4;
}

Save the file and exit. In the above code, the adrees pool consists of all the IP addresses in the range 1.0.0.11 to 1.0.0.200. From this pool IP addresses will be provided to the clients. Gate is given as 1.0.0.1 and DNS servers are 8.8.8. and 4.4.4.4 which are open DNS servers by google.

Start/Stop DHCP server

To start the DHCP server issue the following command:

nareshbaba#sudo su

nareshbaba# service isc-dhcp-server start

To stop the server

nareshbaba#service isc-dhcp-server stop

To check the status of DHCP server

nareshbaba#service isc-dhcp-server status


Conclusion

This tutorial shows how to configure a simple DHCP server. Apart from the the configuration of the server can be enhanced by adding more entities in it like leased time, mac based ip authentication etcc.

Important Notes

1. Before installing the software first update apt-get by the command "apt-get update"

2. The ip address of the interface should in the same range of subnet/mask as used in dhcpd.conf

Comments

    0 of 8192 characters used
    Post Comment

    No comments yet.

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)