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

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Ubuntu Server 12.04, NAT, Router, DNS. It just doesnt work

I recently inherited some server hardware from work and decided that it could be my main router at home (among other things). Ubuntu 12.04 server installation harware wise goes well and everything is ...
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212 views

Getting “Try Ubuntu” Option for Netboot Ubuntu

I've been working the past few days to create a server computer that will allow me to boot a Windows computer on its network into Ubuntu, but without damaging any of the files on the Windows client ...
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586 views

Cannot get DHCP to work when connecting to an Android AP

I am having a problem with my Ubuntu 12.4. Basically, while I can connect fine with a "normal" wireless access point, I am having great difficulty connecting to anything else -- neither with my ...
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755 views

Configure ISC DHCP server “routers”

My challenge is trying to find a conditional way to change the order of the default gateways used in "option routers" parameters. Perhaps on receiving a DHCPDISCOVER message. So the first client ...
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1answer
865 views

MAC filtering after DHCP

How to manage filtering by MAC in Ubuntu? Scenario: Ubuntu DHCP is configured and working (network 192.168.1.0) a) Laptop 1 is set in configuration on Ubuntu as static IP Laptop 1 is configured ...
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Have to run sudo dhclient eth0 automatically every boot

I just installed ubuntu 12.04.1 alternative install (for raid 0 on some disks). I Have some problems with the net. I'm at school, we use cable, and it got IPv6. If I run ifconfig eth0 heres my ...
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1answer
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Can not restart dnsmasq due to “ configuration syntax check [fail]”

I restart dnsmasq and get $ sudo /etc/init.d/dnsmasq restart * Restarting DNS forwarder and DHCP server configuration syntax check [fail] From where and how can I troubleshooting?
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5answers
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How to view the DNS address assigned by DHCP?

How to view the DNS address assigned by DHCP? ifconfig can not show it. $ ifconfig -a eth0 Link encap:Ethernet HWaddr 90:e6:ba:22:6a:f2 inet addr:192.168.1.111 Bcast:192.168.1.255 ...
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Cannot get Dell Dimension 3000 to get DHCP from DCP3010 Charter cable modem [closed]

I am trying to set up a firewall on a Dell Dimension 3000 with server 12.04. I have a DCP3010 cable modem from Charter, when I plug my Win7 laptop directly into the modem I get an IP address through ...
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2answers
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I need to reset my computer's ip address to dhcp from static

I have been running a file server on Ubuntu for a couple of years now. Recently I had to take the network down. When I brought it back up, my server lost its ip address from the router. I can't ...
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NATTING in Ubuntu Server

My Server has two NIC, One is connected to the Internet Service provider with dhcp ip (dynamically change) given by ISP and other NIC is connected with local Switch with 192.168.1.1 IP. Now I want to ...
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DHCP3-server Don't want IPV6 address

Recently we upgraded from a windows 2003 DHCP server to a Ubuntu 10.04 DHCP3-server. The problem I am faced with now is that my windows 7 clients are now getting IPv6 ip address along with the IPv4 ...
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How to automatically renew DHCP IP?

I have a headless server on my network (actually it's just running Ubuntu Desktop 10.04) that for some reason isn't automatically renewing its DHCP lease when it gets reconnected to the network. How ...
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2answers
405 views

Cannot connet to password protected wifis

Network manager cannot connect to a wifi, if the wifi is password protected (WEP or WPA). However it can connect to passwordless wifis. Also, I can conned to password protected wifis manually as: ...
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1answer
253 views

server 12.04 boot dhcp, can not find hard disk

I am trying to set up ubuntu server 12.04 LTS on my old Dell desktop for a LAMP home testing server. The install went fine, but when I start up, I do not see the the grub boot loader (which i ...
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2answers
2k views

Setup DHCP server for LAN party

I will host a LAN party next week where we will create am isolated LAN without internet connection. Since I do not want to set up static IPs on some 8 computers, I thought about setting up a DHCP ...
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1answer
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How to setup DHCP Server and Dynamic DNS with BIND?

Possible Duplicate: How to make my pc a DNS server in local network with no-internet access? I have installed the two servers (dhcp & DNS) what i need is to make the dns dynamically ...
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420 views

Honeyd is not working properly

what i done till nw is.... step 1. install the honeyd step 2. made a config file with the name "honed.conf" step 3. save the file in the same directory where honeyd package is already. step 4. run ...
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196 views

Ubuntu keeps reconfiguring my network

I'm configuring a "network", between two computers(both with ubuntu 12.04), using a crossover cable and assigning all ips by hand. When I set up an interface, with IP netmask etc, everything works, ...
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DHCP is mangling my PTR records in DNS

I originally posted this in LinuxQuestions http://www.linuxquestions.org/questions/linux-server-73/dhcp-is-mangling-my-ptr-records-in-dns-4175412344/ without much luck, so I'll try here. DHCP is ...
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2answers
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DHCP not working on new install

A new Kubuntu 12.04 install is not getting IP addresses from either the wired connection nor from any wireless connection. The cables / router ports / wifi adapter / access point are all known good ...
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3answers
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How does dhclient get called under 12.04

In my 12.04 Precise install, when I boot the system, or when I plug in an ethernet cable, dhclient isn't run automatically on my wired eth0 connection. I have no running dhclient daemon. When I run ...
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1answer
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I try install dhcp3-server, but /etc/init.d/dhcp3-server file is missing. Whats going on?

I've found several how-to's that essentially go through the same process in setting up DHCP. Here's a link that has the list of all steps needed to install and setup DHCP. I followed all the steps ...
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How to define default gateway with multiple DHCP interfaces?

How does ifconfig determine which network interface to use as the default when DHCP assigns a default route for each NIC? It seems like it's in a race-condition and I need to have a more reliable ...
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How to make dhclient forget its last DHCP lease?

What I'm trying to achieve is to get cold-start, zero-state DHCP lease which means forcing dhclient through the full discovery and configuration process (DHCPDISCOVER–DHCPOFFER–DHCPREQUEST–DHCPACK as ...
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testing dhcp server locally on one physical machine with virtual machine

I'm writing simple program to configure and monitor DHCP server on my Ubuntu 12.04. What I'm trying to achieve that my physical machine will be DHCP server and my VM (virtual machine) get one lease ...
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1k views

Unable to set default gateway on a hosted Windows virtual server

I'm running Ubuntu server via Hyper-V and have successfully installed it but seem unable to ping the server or ping any other machines on the network from the server. After doing a bit of reading ...
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Having set up a DCHP server, what do I need to do for the rest of my network?

I've got a Raspberry Pi arriving any day now, and I intend to use it (amongst other things) as a DHCP server. Currently we have a few devices on our network to which we would like to assign static ...
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Why do none of my local servers resolve?

When I try to ping or browse using a web browser certain domains names that we host on our local network, it does not work. Yet, dig and nslookup correctly return their details. What do I need to do ...
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111 views

How do I connect to available networks from the command-line?

More accurately, how do I tell Ubuntu to obtain an address using DHCP for all the network interfaces it finds (which do not require a password)?
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How do I configure a DHCP server?

How to configure a DHCP server in Ubuntu 12.04? I need a step-by-step tutorial if somebody has one.
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What is the difference between dhcp3-server and isc-dhcp-server packages?

What is the difference between dhcp3-server and isc-dhcp-server packages in ubuntu 12.04?
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Wired network connection fails after installing Ubuntu 12.04

Having installed 12.04 amd64 desktop from the alternative ISO (I'm using LVM on a RAID5 array), my networking fails after booting into the installed system. It works fine on the 12.04 Live CD and ...
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Ubuntu 11.10 dhclient-enter-hook.d scripts not invoked

I have a box with Ubuntu 11.10 installed. And the box was configured to get IP and hostname from dhcp. We have set to scripts in /etc/dhcp/dhclient-enter-hooks.d/ folder. But these scripts were not ...
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How to add some additional DNS search domains without ignoring the ones returned by DHCP?

Please provide: correct location to add my custom domain search option (preferably appending it to the DHCP list, instead of prepending) command to run to make the settings effective Note: do not ...
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1answer
482 views

DHCP server doesn't assign network dns to other hosts on my network

I had a problem with my DHCP but I managed to fix it. Now the network starts but I have a problem with DNS. Clients in the network don't get any dns from my DHCP. My network works as follow my I ...
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277 views

Connect to dhcp printer server

Hope someone can help me. Knowing that on Windows, what I do is to open Windows explorer and tape \\srv-dhcp. How to do the equivalent on Ubuntu? Thank you for your help.
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Can't connect to internet using DHCP and cable modem

I'm new to Linux but liking it so far. My symptom is that I have a machine which dual boots WinXP and Ubuntu -- internet works on WinXP, not on Ubuntu. Some specs: Ubuntu 11.10; AMD Athlon 64 ...
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resolv.conf doesn't get set on reboot when networking is configured for static ip

I'm experiencing what appears to be a name resolution issue in Ubuntu 12.04 Server edition when configuring my computer to use static ip. In /etc/network/interfaces: # The primary network interface ...
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447 views

Internet doesn't work by default

After upgrading to Precise, I am required to run 'sudo dhclient eth0' in a terminal in order to get the internet to work. Everything worked perfectly fine on Oneiric, so It's really puzzling me. I'm ...
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26k views

Is it possible to use Ifconfig to switch an interface to DHCP and if not, what is the best way?

I have just set up a new Ubuntu server and I am going to be doing a lot of networking tests. During setup, I simply skipped the network step. I now need to switch between DHCP and an address quite ...
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794 views

problem loading internet pages

I have installed ubuntu 11.10 and when on firefox i can get onto google or google earth and even gmail.But it wont connect to amazon or ebay or bbc or itv homepage.It only seems to like google I have ...
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663 views

Dynamic Bind9 + DHCP

i have been working on setup a server for my internal network, so far i have a working isc-dhcp-server that can upgrade a chrooted BIND9 (on the same machine), i need to add some static entries on the ...
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5k views

DHCP server not routing to connect to internet for clients

i am configuring a DHCP server using ubuntu 11.10 with 2 lan cards.eth0 is connected to wan on ip address:192.168.2.2/24 and eth1 connected to lan is configured with ip:192.168.10.1/24 ...
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1answer
5k views

PXE Boot Server stalling with “File not found” error

I'm trying to setup my Ubuntu 10.04 Server to allow PXE booting for the clients in my lab. I have configured the DHCP settings and everything, and I boot up my client, and it sits at a screen similar ...
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How to make an internet server as firewall using ubuntu 11.10

i have one static broadband connection which is coming to my Ubuntu server with 2 lan cards, there are 10 more PC's to which i need to provide internet connection through Ubuntu server as well as i ...
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How do I download and install dhcpv6 on my server using Ubuntu?

I've downloaded dhcp3 on my server and I now need the server to assign ipv6 addresses. Also what is stateless autoconfiguration and how do I use it on my server?
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Server 11.10 to be used as a DHCP server

I am trying out an ubuntu server in my home network and I am planning to use it as a dhcp server. Since ubuntu is installed in a desktop with just 1 Ethernet port my question: Is it possible to ...
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783 views

aufs Root File System On Usb Flash

I configured aufs as a Root File System On Usb Flash Drive by this article. So the first brunch is real root FS and it is read-only. The second brunch FS is in memory and it is read-write capable. ...
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Is dhclient.conf used during boot when bringing up network interfaces?

I am running Ubuntu 11.10 32bit Server on a single-board computer. I want the option of using the Ethernet interface (eth0) as a backend to control the computer if it's connected. I'm also lazy: if ...