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 in NetworkManager but ifconfig does not show the ip (ubuntustudio 14.04)

i am running ubuntustudio 14.04. I have a development setup where my pc has 2 NICs one of which connects to the internet and acquires dhcp ip from the router, while the other (eth1) is used to ...
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Configure LXC with additional IP ubuntu 14.04

I'm still looking for answer on my question. I have a dedicated server with ubuntu server 14.04, and 2 public ip. I want to add 1 public ip per 1 lxc. I think i've tried everything and nothing helped ...
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Wireless DHCP configuration fails on open network

I upgraded to Kubuntu Trusty last summer, and now that I'm back in school, I've noticed that my laptop has been failing to connect to the school's wireless (which is a completely open network). Every ...
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36 views

14.04 Desktop: Static IP is acquired, ping works, DNS does not

My question is very similar to this one: Can ping but no DNS I have setup a static IP on my previous Ubuntu versions - 9.04 and 12.04 - without issue. I have used an identical means this time as ...
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23 views

How to share internet connection and making the client accessible over the lan

I've a Pc with Ubuntu 14.04 connected to a linkys router through wlan0, and I'd like to share internet connection to an AVR with ethernet port. This is pretty simple if only internet connection is ...
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19 views

How to make IPv6 duplicate address detection (DAD) work on Ubuntu?

I have an Ubuntu host running inet6 dhcp. This is what I configured on the /etc/network/interfaces file: auto eth1 iface eth1 inet6 dhcp up sysctl net.ipv6.conf.eth1.accept_ra=1 pre-down ip ...
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1answer
33 views

Static IP breaks Network connection

I am somewhat new to Linux. I am setting up a Web server and installed Ubuntu server 14.04 on an vSphere ESXi 5.5 host. I am connecting perfectly fine to the internet when using DHCP but when I apply ...
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18 views

Failover/ gateway issue. Help please

hope someone can help, this would be excellent. I’ve ubuntu DHCP server (10.04), which works great (many thanks to everyone who helped me in this excellent forum). This server has 2 cards, eth0 for ...
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25 views

winbind not working after upgrading to 14.04 (from 12.04LTS) [duplicate]

Winbind stopped working after I upgraded to Ubuntu 14.04 (from 12.04 following the automatic upgrade prompt). This is on a home LAN with my router providing dynamic IP addresses to my machines. ...
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Only a different subnet and a virtual IP for it seems to work out to access my IP-cam

My Router IP is 192.168.1.1. DHCP-Range from 192.168.1.33 to .64 . My IP-Cam (Hikvision) is set to IP 192.168.1.100. Funny enough I can access the IP-cam only if it is on its factory default ...
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Has Ubuntu some firewall activated by default?

Because I can't seem to connect to my ip-cam. And mnap produces alternating results if I use the cams IP address: Nmap scan report for 192.0.0.64 Host is up (0.00079s latency). Not shown: 991 closed ...
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1answer
35 views

iSCSI + br0 bridge + 14.04.1 Server = does not work

On one of my servers I have: USB 4GB: 1) EFI partition 2) /boot partition iSCSI 50GB (on another fileserver): 3) / partition In /etc/network/interfaces it works flawlessly if I have: auto p3p1 ...
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33 views

Error in Ubuntu Software Center isc-dhcp-common

Whenever I run the Software Center I get errors. I have have found similar questions on the message board but none of the solutions worked for me. When I run sudo apt-get -f install the result is ...
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1answer
20 views

DHCP leases flash of Docker

I've docker container, it uses internal DHCP to assign the IP to its Network Interface. Each time I stop and run the container again, the new IP is assigned, ex: 172.17.0.2, 172.17.0.3, 172.17.0.4 ...
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Multiple DHCP leases on single interface

If I want to have 2 static IP addresses, I can do something like this: auto eth0 iface eth0 inet static address 192.168.1.10 netmask 255.255.255.0 broadcast 192.168.1.255 auto eth0:0 ...
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46 views

Need to update /etc/hosts every time I connect to network because of dynamic IP

Every time I connect to the network at work my device gets a new IP address which makes it /etc/hosts/ invalid and my hostname becomes unreachable. I was looking for a way to set /etc/hosts ...
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50 views

Ubuntu 14.04 Desktop not automatically renewing DHCP lease

Sometimes my laptops networking just stops. I fix it by doing sudo ifdown em1 sudo ifup em1 The strange thing is, in previous releases and other *nix distros that usually doesnt produce an prompt ...
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Is there a way to statically map MAC addresses to IP addresses for machines in MAAS?

I have few (11) servers in MAAS that will be used for OpenStack deployment. I want to give specific IP addresses to specific nodes in the MAAS. Is there a way to map the MAC address to IP address so ...
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101 views

Setting up DHCP server - fail to start/stop it

I am following this guide. I am completely new to Ubuntu, working on 14.04 LTS. When I reach the last step before dealing with Kerrighed (half way through the tutorial), I try to start my DHCP server ...
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26 views

Second virtual interface fails

I'm trying to simulate multiple hosts in my laptop for testing wifi connections with Access Point. Trying to create virtual interfaces using iw command. The file /etc/network/interfaces looks like ...
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28 views

Can not apply a static IP address to Virtual PC?

I Installed an Ubuntu 12.04 LTS Server as a Virual Server using Wmware Workstation 10. Unfortunately when I change the DHCP setting to static. The server is unable connect to our network, it works ...
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dnsmasq getting log spam from use of macvlan interfaces

I'd like to know if this procedure will work for creating virtual eth interfaces inside an LXC. It seems to work for awhile then I get a spam of these every couple seconds. Jul 10 16:54:22 ...
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38 views

MAAS network configuration error and issue

I have tried a couple times to get MAAS up and running and the issues seems to be incorrect network configuration. I have a server with 2 net ports. EM1 is the network for MAAS and the servers that ...
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1answer
58 views

How to change Ubuntu DHCP server address on the client?

How do I tell Ubuntu to use a specific DHCP server IP? I'm building a virtual test network in VirtualBox where I have a Ubuntu server installed. However, VirtualBox doesn't have an option to tell ...
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DHCP3-server not working correctly

I installed dhcpe-server with apt-get install dhcp3-server, and I want to configure it on terminal. When i type dhcp i just see these : dhclient dhclient-script dhcpd dhcpx I tried to start its ...
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1answer
40 views

How can CUPS dynamically determine the IP address of a network printer?

I am trying to set up CUPS to access a network printer. Its IP address was assigned via DHCP by the internet router, which is also the DHCP server. I understand that this address may change from ...
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1answer
54 views

2 ubuntu dhcp servers

I would like to run 2 DHCP servers at the same time, each one should have differnt IP but both in the same subnet, same gateway but one has to have the first half of the DHCP rang and the other the ...
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1answer
258 views

Where is isc-dhcp-server configuration files in Ubuntu 14.04?

On Ubuntu 14.04 LTS I can not find the path to isc-dhcp-server as it is mentioned in several areas as in this (for Ubuntu 12.04). It is installed on my machine, but I want to access its configuration ...
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32 views

DHCP running at startup

In order for my WiFi at work to work I had to use wpa_supplicant, as the Network Manager just would not connect. Manually I use two commands: sudo wpa_supplicant -B -i wlan0 -c ...
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23 views

How to configure my Ubuntu server as a dhcp router

I have a little problem with configuring my ubuntu server properly. On the ubuntu server there are 3 internet cards and one of them is wi-fi card. I read a lot of info for my problem but i couldnt ...
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Ubuntu MAAS DHCP working DNS Not working

I setup Ubuntu 14.04 MAAS on one server. I setup interface to manage DHCP and DNS via the Cluster interface. DHCP is working. But, DNS is not! When I try to add another node, it is doing PXE boot, ...
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MAAS: Unable to start “Commisioned” nodes

I am having problems while trying to start my first node using KVM (QEMU 2.0.0) and MAAS. Automatic detection worked fine, and during the commission (virtual machine window) I get errors such as: ...
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536 views

Ubuntu Server 14.04 share internet from eth0 to eth1 with commandline

I have installed ubuntu server 14.04 LAMP with two network adapters and I'm attempting to share the network from eth0 (WAN) to eth1 (LAN). The reason for doing this is that the Ubuntu Server works as ...
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69 views

Ubuntu maas DNS Node not connected to internet

I have a Ubuntu MAAS Region and Cluster Controller on one Server. It is running DHCP Server as well. MAAS Cluster interface - "Manage DHCP and DNS" did not start a DHCP Server. So, I had to manually ...
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MAAS DHCP Server Setup, PXE TO1 TFTP File Not Found

I am setting Ubuntu 14.04 MAAS Cluoud. I have setup the region and cluster controller. For some reason, MAAS was not running DHCP even though (1) maas-dhcp and maas-dns were installed, and (2) Added a ...
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override dns nameserver

i wish to set higher priority for my dns nameservers, or override the ones that are being set by the dhcp server. no matter which approach i took, nslookup never displays the right dns nameserver. ...
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68 views

Ubuntu MAAS DHCP Not working Cluster

I am a newbie with Ubuntu MAAS - I have region & cluster controller running on one machine. I have two NICs - eth1 - which is connected to our organization and eth0 - which I am trying to setup ...
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198 views

Intermittent wired network issues in 14.04

Since yesterday, my wired network connection has been dropping for a couple of seconds every 30 seconds or so. To my knowledge, I had not made any changes to my network. Output of ifconfig -a: ➜ ~ ...
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Zentyal PDC on MAAS

OK, so I may be smoking crack here, but feel free to tell me... ;-) I currently have a server running Ubuntu 12.04 LTS and Zentyal 3.3, with the latter configured as my primary domain controller ...
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How to reset DHCP poolin ubuntu server 14.04?

Would like to know how to reset the DHCP pool in Ubuntu server 14.04, as I would like the server to advertise IP-addresses beginning from the start /first IP of the pool. Could anyone help please? ...
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DHCP server on MAAS

I have disabled DHCP on my router in my DNS and DHCP server is installed, configured the cluster, but my DHCP does not work and so I cannot add nodes via PXE. I'm using Ubuntu Cloud OpenStack 14.04.
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How to Stop DHCP Server

I have installed a DHCP Server. Now I need to stop the dhcp server, when I issue the command: sudo service isc-dhcp-server stop I get stop: Unknown instance. I confirm the DHCP service is running. ...
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Multi gateways & Vlans

With all your help and support, I’ve managed to configure an ubuntu dhcp server with 2 network cards, and it’s working well. Thanks again. My next step is more advanced, it’s to configure another one ...
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49 views

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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No ping to gateway although received DHCP lease from gateway

I try to connect my server to my network over WPA2. After ifup wlan0 I get a valid DHCP lease from my gateway (192.168.1.1). However, if I try to ping/access any computer (internal network, gateway, ...
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IP switched to dhcp on reboot on Ubuntu

I try to set a static IP with the following stanza in /etc/network/interface auto lo iface lo inet loopback allow-hotplug wlan0 iface wlan0 inet manual wpa-roam ...
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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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1answer
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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 ...