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

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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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Can't Open A Specific Website. Can Open With A Proxy. wget stucks on “HTTP request sent, awaiting response…”

Ok, I'm having a very weird problem. I've searched through google and ubuntu forums but it seems that this problem, if faced, is unsolvable. However, I'm very hopeful that I'll get a solution here. ...
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22 views

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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21 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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13 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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maas user interface does not talk to or sets up dns/dhcp

after setting up maas, i go to the ui http://xxx.xxx.xxx.x/MAAS. when i go to the cluster settings, and select dhcp/dns setting fill in all the info, and i get nothing. i do a dpkg -l maas-dhcp ...
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2answers
121 views

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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1answer
20 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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35 views

How to create a new internal DHCP server on Ubuntu?

In office, we have a router which provides DHCP features and its subnet is 192.168.1.x. The router IP is 192.168.1.1. I want to setup a new subnet to try Hadoop cluster using isc-dhcp-server on Ubuntu ...
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63 views

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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1answer
73 views

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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2answers
26 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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77 views

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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56 views

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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1answer
39 views

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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1answer
34 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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79 views

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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35 views

Relinux - “waiting for network configuration” problem

I installed Ubuntu 12.04 base system via the "minimal ubuntu" ISO. I make a script to get hostname from dhcp server as explained here. It works perfect. I don't install network manager because I ...
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60 views

Installing DHCP Server on Fog Server using Ubuntu 12.10 when it was not installed initially?

I installed Fog Server 0.32 on Ubuntu 12.10, and when I first did it, I connected it to our network thinking that I was going to get away with ghosting the machines where they sit. However, after ...
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1answer
151 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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1answer
130 views

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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74 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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1answer
59 views

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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2answers
47 views

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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1answer
123 views

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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32 views

how to change content of interfaces file?

my /etc/network/interfaces file looks like this auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.81.20 netmask 255.255.255.0 gateway ...
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23 views

How do I set up a ltsp server inside a windows DHCP network

How do I set up a ltsp server within a windows DHCP network. How do you make it to only assign DHCP to certain Mac addresses? Then once that is done, do I need to rebuild the thin client?
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175 views

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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44 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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194 views

Resolvconf is not updating resolv.conf file when connecting via DHCP

I'm running 13.10, and when I connect to a wired network which is configured in Network Manager for DHCP, I get an address, but resolvconf is not updating /etc/resolv.conf properly. I get an IP ...
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142 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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66 views

Ubuntu 12.04LTS server: cannot get isc-dhcp-server to start

When I try and start isc-dhcp-server I get a can't open /etc/bind/rndc.key: permission denied So per instructions from Ubuntu site I added to /etc/apparmor/usr.sbin.dhcpd /etc/bind/r, ...
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1answer
213 views

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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1answer
117 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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1answer
76 views

How to know my dynamic ip is comming from which DHCP server?

The situation: On my LAN there are more than DHCP servers running and all of them are on the same range. Now I use a machine who got an IP dynamic from a DHCP server. I have to know From which ...
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1answer
59 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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64 views

Captive portal setup and content of interfaces file

I am trying to design a captive by referring to this link Captive Portal Using PHP and iptables Firewall on Linux In initial setup(linux box router) it is said that my interface file should be as ...
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70 views

How do I bind my internal ip to my external ip with dhcp?

I am making a minecraft a minecraft server, I have forwarded the port 25565 and have done everything necessary for it to work, with a functioning DNS that updates from the external ip every 5 minutes. ...
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35 views

Cannot connect to the network anymore using DHCP

It's an apartment house's network and the connection worked fine for two days until yesterday. Problems are same plugging in directly with network cable or using a switch. If I boot with windows, ...
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1answer
26 views

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 .
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Network starts slow on Ubuntu 13.10 start or resume

I have this laptop (ThinkPad X1 Carbon) with Windows 7 and Ubuntu 13.10 dualboot. Recently upgraded from Ubuntu 12.10. The good thing about this upgrade is that Ubuntu 13.10 starts very fast compared ...
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186 views

adding request to DHCP starvation using Scapy?

using this code for DHCP Starvation conf.checkIPaddr = False ...
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1answer
126 views

dhclient.conf supersede stanzas ignored

I'm putting the following lines at the top (also tried the bottom) of my dhclient.conf file: send host-name "hostname"; supersede domain-name "my-domain-name" supersede domain-search "my-domain-name" ...
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1answer
72 views

How can I share my internet connection from windows to ubuntu?

Okay, so I have a mobile connection attached to my main pc (windows 8.1), the address range is 192.168.43.1 - 255 with the gateway being 192.168.43.1 and I want to share this to my Ubuntu server which ...
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DHCP starvation with Scapy (12.04) only “starves” one single address repeatedly

so im running this: conf.checkIPaddr = False ...
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2answers
285 views

Configuring a network on a multi ethernet port server

Hy to all: I have just installed Ubuntu Server 12.04.3 on a Sunfire X4100 This server has 4 ethernet port, my target is to use: eth0 to connect to the modem and so to internet eth1, eth2, eth3 to ...
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1answer
41 views

No network out of the sudden on Ubuntu 12.10

Recently, I replaced my network card and had few issues with the new card and the network connection on the office Intel Xeon 5500/Core i7 white box server running 64-bit Ubuntu 12.10. I ended up ...
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71 views

unable to connect to open wifi on a headless Ubuntu on ARM

I have headless Ubuntu 13.10 on a little ARM device (a BeagleBone) with a wifi adapter connected to it. I'm unable to get an IP from DHCP: 'sudo dhclient wlan0' takes a while to run and when it comes ...
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1answer
82 views

DHCP Configuration in ubuntu server 12.04 LTS

I know i can configure DHCP in terminal by installing isc-dhcp-server but what i need is the best GUI program that allow me to configure DHCP settings graphically . Any Suggestion is thankful ?
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2k views

Problem configuring dhcp server: Job failed to start

I m trying to configure dhcp server in ubtuntu onto my virtual box and connecting other virtual instance of ubuntu to this dhcp sever i have installed dhcp server using sudo apt-get isc-dhcp-server ...