The Dynamic Host Configuration Protocol (DHCP) is a network configuration protocol that assigns IP addresses and gateway configuration automatically.

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Static ip but dynamic nameservers?

Trying to change nameserver' settings for a Ubuntu-13.04 server I came upon this situation! /etc/network/interfaces : # This file describes the network interfaces available on your system # and how ...
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Assigning a static IP to Ubuntu Server 14.04 LTS

I've installed Ubuntu 14.04 LTS Server in my machine on a separate hard drive while having my Windows 7 installation. The Windows OS has its full network connectivity and internet access through the ...
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domain name in dhcp

I want to configure DHCP on 14.04. So I downloaded isc-dhcp-server from the repository. In configuration file I see these two line which are not commented. What is the usage/purpose of the ...
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dhcp fails after initial reboot with “No working leases in persistent database”

I just installed ubuntu server 14.04 LTS, overwriting 12.04. The installation appears to proceed correctly. During the installation process the IP and hostname are correctly obtained via dhcp. ...
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108 views

Web filtering, dhcp, proxies in a distro?

I want to ditch our Dave's web filtering because it blocks anything our dear Gov do not like, but I also want to protect my children from porn. I am thinking I can install a cut down Ubuntu distro on ...
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126 views

Strange issue with DHCP on Ubuntu 12.10 [closed]

I've configured a new Ubuntu DHCP server (12.10) and it's working fine (thanks to you all for all you help in setting it up). I have a strange issue, and don't know what's going on. I hope I will get ...
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583 views

Correct DHCP client configuration

I have two dhcp directories in /etc: /etc/dhcp and /etc/dhcp3 Which one is the correct direcotry for editing my dhcp client configuration? I want to send the hostname with dhcp and so was trying to ...
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144 views

Is it possible to periodically repeat a dhcp request?

I have my ubuntu server set to get addresses from a dhcp server. However, if that dhcp server is not currently active, the server will just stay with no address. Is there some mechanism to ...
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143 views

inactive enable Wi-Fi

I did some changes on my wi-fi connection to give ip manual and somethings else I do not remember what exactly i did and now Wi-Fi connection is not enable on the menu bar I set my connection again to ...
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dhcpserver configuration, please help

I hope I will get help here. I need to configure an Ubuntu dhcp server (12.10), the server has 2 network cards. What I need to do is to configure the server as DHCP to give clients IP-Addresses ...
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Unable to set static IP address in Ubuntu 14.04 [closed]

I've never had so much problems setting a network interface card to static addressing. I'm not sure what has changed, but I can only seem to get this thing to work if it's set to obtain the address ...
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iptables ruleset blocking LAN and WAN

Having problems with your Intel I217-V ethernet port? I suggest you read this entire post. Whilst drivers were not my issue, nor my answer (in the end), this post will still provide useful insight. ...
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725 views

Why dhclient is still running when I choose static IP?

I modify dhcp to static in /etc/network/interfaces (like below). # The primary network interface auto eth0 iface eth0 inet static netmask 255.255.0.0 address 10.10.130.128 gateway 10.10.1.1 Then ...
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181 views

Where can I specify init service conf for isc-dhcp-server?

I used service isc-dhcp-server start to invoke the dhcpd. if I do ps -ef | grep dhcp here it is: root@casalab-Latitude-D530:~# ps -ef | grep dhcp dhcpd 6636 1 0 Apr28 ? 00:00:00 dhcpd ...
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810 views

Ubuntu server network autoconfigure failed

I'm novoice Ubuntu server user. Im using Virtualbox to install Ubuntu Server 13.10 While installation process i got message Network Auto Configuration failed I selected Continue Now my server ...
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What's the correct MAAS DHCP configuration?

I've set up a MAAS controller by following this documentation: http://maas.ubuntu.com/docs1.4/cluster-configuration.html However, when I got to the DHCP configurations I was a little puzzled. The ...
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Configuring two half-separate lans using DHCP

I have to set up DHCP that has to assign IPs over 2 networks (192.168.0.0/24 and 192.168.1.0/24). That is easy and I've got it working. The question is, is it possible to make PCs from one network ...
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DHCP and static IP address simultaneously in ubuntu

We can use multiple IP address for a single interface in linux(eth0:0, eth0:1). But can we use dhcp and static IP in the same time?? eth0:1 should have a static IP address and eth0:0 will be configure ...
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Macvlan interfaces beyond first interface fail to connect.

I've been working on a project to build a set of macvlans on ubuntu. The process I'm using comes from here. In short, I run this set of commands to build and initialize an interface: ip link add link ...
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122 views

How to direct DHCP requests based on IP

I have a home server that I want to make multicast a music stream to my network. I have the server connected to my main network router via WiFi, and I have a switch connected to the server by wire ...
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Cannot connect to wireless in Lubuntu 14.04

I have tried all afternoon to fix this, but now I give up. I am trying to set up an old XP PC with Lubuntu 14.04. It works perfectly fine, except for the wireless connection. Connecting with ethernet ...
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99 views

DHCP Server & Client

So I'm having a bit of trouble getting my DHCP server to assign and IP address to my clients. I have the dhcpd.conf file configured to assign a range of IP address to my clients as follows: ...
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VirtualBox: Simulate network and DHCP Server - cant reach hosts

I have 4 Virtual Machines with VirtualBox and I want to set up a virtual network like this: The VMs have multiple eth interfaces using "Internal Networking" mode in Virtualbox. My goal is to be ...
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How is information passed between ipconfig and the init process at boot time

I'm trying to assign an IPv6 address to my machine at early boot time (in order to boot a diskless system over IPv6) with ip -6 addr add $ipv6/108 dev eth0 at nfs-premount. This works fine, but as ...
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191 views

MAAS / nodes have limited internet access after install

I´ve installed a test environment for MAAS and JUJU. MAAS manages both DHCP and DNS. Following setup: maas01 - static IP juju01 - dhcp and dns from maas01 node01 - dhcp and dns from maas01 and pxe ...
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96 views

Why after installing Ubuntu by PXE it never has Internet or Internet Connectivity?

I've even trying for weeks to install Ubuntu over the the network. I have been successful at setting up my Ubuntu Server and also I am able to get my clients to pxe boot and everything else is working ...
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How to run a script when there is a change in your local IP?

Before marking as a duplicate: this is not about dynamic DNS or similar things. I know how to run a script every time my networks goes up; it is a simple matter of adding a script in the directory ...
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56 views

LAN but no WAN acess

I have just moved and when I did I received a new DSL modem. I have set it up as a transparent bridge as I have an internal router. It is just like I had done before, except I got rid of my static IP. ...
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Can't install software due to broken isc-dhcp-server dependency

while trying to setup hotspot i have messed up with the dhcp server setting , i do not know what went wrong but i am getting following error while installing anything : Errors were encountered while ...
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Ubuntu 12.04 wired connection doesn't work!

I just installed Ubuntu again after a few months of using Windows. At first I tried to install it by using an .ISO file, but I got stuck at 43% on the partitioner, so I figured out I should use the ...
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111 views

Cannot acquire DHCP address

I am unable to acquire a wired DHCP ip address. I have Ubuntu 13.10 installed on a thin mini-itx ECS Q77H2-TI motherboard. I'm connecting to my cable modem which does provide ip addresses to other ...
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ISC-DHCP-SERVER (primary/secondary) - Can Load Balancing Be Disabled?

When I was hired at my company, I quickly determined that one of my highest priority projects would be to improve our ancient DNS/DHCP setup. It was running on an Ubuntu-based workstation-grade server ...
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What is changing the network interfaces?

I installed Ubuntu 12.04 to virtual machine. I have edited /etc/network/interfaces like this: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp Then I created a livecd.iso using ...
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Can I have a dhcp interface in /etc/network/interfaces?

I have an interface already configured for an internal interface, which is static under eth0. My question is, can I create a dynamic outfacing interface under eth1. The reason I want to so this is ...
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121 views

Ubuntu 12.04 LTS & 13.10 not installing - IP through DHCP not working

I have this odd issue. I can't install 12.04LTS or 13.10 (both server) on my server. During the 'getting IP from DHCP' processes, the installation can't optain an IP address. Cable is fine, eth0 is ...
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Blank/empty hostname

I am using Ubuntu 12.10 and i was wondering if there is way to not send my hostname when connecting to a router? For example when I connect to my router I can see my laptop hostname when I log on the ...
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988 views

Using Ubuntu 12.04 DHCP server to securely update DNS records in Active Directory

What seems, to me, to be a simple question, apparently isn't. I have a Linux (Ubuntu 12.04) DHCP server: isc-dhcp-server, that works GREAT. No issues and all clients can get an address with no ...
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How to get host-name from DHCP server via Network Manager?

I can get hostname and ip address from DHCP server with invoking the script under /etc/dhcp/dhclient-exit-hooks.d/ directory as explained here on client side . EDITED: I assigned host-name and ip ...
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186 views

Ubuntu Server 12.04 stops responding soon after assigning a static IP manually

I know there's a lot written about this issue but no response seem to answer my question. So I am wondering my problem is with the most recent version of Ubuntu. I have just installed an Ubuntu 12.04 ...
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How to release all IP addresses in my LAN network

I have ~100 clients on my LAN. When they get turned on simultaneously many seem to get assigned the same IP addresses. - I use dhcp How can I get them get ubuntu to release all the currently ...
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Ethernet- Device not managed after changing static ip

I have changed the ethernet static ip to the default wi-fi local ip. This is so that my local and public services work after switching from a wireless connection to ethernet. At first, the solution ...
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Wired network does not work in Ubuntu, but works in Windows 7

Updated: I have pasted full output of bash command in Ubuntu into here, including ifconfig, ping, nm-tool, modinfo and dmesg | grep e100. Hi all, I can surf internet in Windows 7, just pluging in ...
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How to set hostnames to specific range of IP addresses on DHCP Server?

I'm working on Diskless Linux Clusters. I'm using Ubuntu Server 12.04( DHCP, TFTP and NFS servers installed and configured). When I boot slave machines via Live CD, all of them have same hostname but ...
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472 views

How do I set network speed and duplex during boot?

My problem is that I have ADSL box doing autonegotiation, defaulting to 100Mb. However, my network cable does not seem to operate at that rate. The speed is set to 100Mbps but DHCP fails. I need to be ...
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2k views

Wired network is connected & acquires IP address but the internet is not working

So the other day when my network died completely without a warning at first. I thought it may have been the modem or the router (the modem can't handle to many connections as its a a bit dodgy); but ...
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Can't resolve windows domains in local network

I've installed ubuntu on my computer at work because I think it is a perfect system for work which I do but I got some issues. I can't resolve domains from windows DNS server. Basically, we have two ...
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507 views

Ubuntu How to setup Multi Dhcp Server

If you have 2 NIC (network Lan card) each connected to different networks: => eth0: 192.168.1.0/24 => eth1: 192.168.2.0/24 I need the Dhcp server to serve the different subnets ip leases ? How to ...
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How can I find my DHCP server?

On my LAN there are multiple DHCP servers running, and all of them are on the same range. Now I use a machine which has a dynamic IP address from a DHCP server. I have to know from which server it ...
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748 views

MAC filtering for DHCP3 server

I am setting up a school network and i have an ubuntu 13.10 sever. I am looking for a way to deny all devices to get an ip, except for the devices which MAC address I specify in a certain list. As I ...
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Question about dhcp server in ubuntu server 12.04

I configured a dhcp server , i then configured a client to take a dhcp ip . I need from server terminal to know the addresses released to my domain Pcs .