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

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KVM Bridge DHCP - Connection on Host drops - Same IP address for br0 and eth0

I'm trying to create a bridge for a vm in Ubuntu 14.04. My original /etc/network/interfaces file looked like: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp And after modifying it, ...
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Cloned server cannot connect to network

I have set up a server running Linaro 12.07 (based on precise). I installed avahi-daemon so that it can resolve hostnames of my other machines. It's network connection works fine and connect to other ...
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Cannot connect to internet due to route table oddness

Environment: Ubuntu 14.04 Problem: I want to connect to my VPN at work from home. Whenever I connect to my wireless, my route is set up to the work route. The home gateway is supposed to be ...
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IP Address of Shared WiFi Client

Rather than buy a wifi card or run a very long cable I dedicated an old netbook to share it's wifi connection with a PC via ethernet. Both machines are running 14.04. I had no problem setting it up ...
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how to set default gateway in dhcpd6.conf

IPv6 dhcp server would like to set default gateway for all clients. For ipv4 it can done by adding option routers <gateway-addr> inside subnet. But what needs to be added for ipv6 configuration? ...
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How to configure dynamic DNS for IPv6 using bind and isc-dhcp-server

I have a ubuntu 14.04 LTS machine created in VirtualBox which I could configure IPv4 delegation via isc-dhcp-server. Then by follow this great tutorial, I could configure such machine to also update ...
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Equivalence of dhcpcd -T on dhclient

Is there any equivalence of 'dhcpcd -T' command on dhclient?
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Ubuntu Server 14.04 eth0 loads not load after 1st updates

I have a fresh install of Server 14.04 running on an old Dell OptiPlex 755 MT. It automatically connects to my network and I can reach it through SSH without an issue. I also made sure to edit the ...
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79 views

Obtaining automatic IP with network-manager fails, but static works with wicd

Update I've connected to my home router with wicd and a static IP. Thus, the problem seems to be that my laptop cannot get an IP address automatically. Hence, the main question now is: How can I get ...
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35 views

Ubuntu Server | Gateway: 0.0.0.0

I am trying to setup an Ubuntu Server (non-graphical). However when I try to assign a Static IP address to the device instead of the default DHCP -- the system keeps telling me that the gateway is ...
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MAAS remote cluster controller as name server

Following my success with the setup of a remote MAAS cluster controller (see Issue with MAAS cluster controller, installation fails) I have a problem with name servers. Basically the question is how ...
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Restarted MaaS cluster, systems unaccessable

I build a cluster with 14.04 LTS, MaaS and juju. We had a plant shutdown, so I shutdown the cluster using MaaS/Nodes I selected all, then in "Bulk Action" I selected "Stop Selected Nodes" and clicked ...
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List of available networks disappears after 15 seconds Lubuntu 14.04

When I boot lubuntu 14.04, running on my Dell 11 chromebook, if I click on the network manager applet in the panel it lists the 8 or so networks in range. After roughly 15 seconds, all the networks ...
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side effect between isc-dhcp-client, network speed and lightdm

I have 300 computers on running on 14.04 64bits Ubuntu, i use isc-dhcp-client to get ip and name from my dhcp server. I encounter the classic problem with lightdm "your system is running in ...
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Why do I get IP 10.42.0.1 when plugging in an Ethernet cable?

For a few months I have the problem on my Ubuntu 14.04 box that when I plug in my Ethernet cable into, I get the IP 10.42.0.1 assigned instead of getting an IP via DHCP. I can fix this problem ...
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38 views

Configure DHCP on Ubuntu 12.04 to share internet to subnet

I'm well aware of the plethora of documentation on setting up NAT and a DHCP server in order to share internet to a LAN. Here are a few articles that I think are getting me close, however I still ...
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46 views

No internet access after system update

So I've just install some various updates that shows up. After system reboot I've lost internet access... Please help me with this :( I'm using kubuntu 14.10 on VirtualBox Network Adapter 1 is ...
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Setting up network for two places with different static IP addresses by script

I have a Raspberry Pi 2 and I'd like to use it at home and at work. At home it could get a DHCP address or a static address 192.168.2.x but at work it must get the static IP address 10.10.34.122. I ...
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Static IP v.4 LAN Suddenly Lost Connectivity

Suddenly, on June 15, our static IP v.4 wired LAN lost its Internet connectivity. This is a wired LAN, each device with a static IP v.4 address behind a router, and has worked flawlessly for ...
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Broadcast ubuntu router on network connections

I have configured my ubuntu server to become a router. It has a network of 10.1.10.0. How do I broadcast this network for devices to see it as a choice for a network connection?
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isc-dhcp-server and compiz?

I'm facing a very strange problem. I'm using Ubuntu 14.04 LTS. Everything is normal until I install isc-dhcp-server. When it's installed, my desktop becomes abnormal. All strings (file/folder names) ...
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23 views

Make ubuntu server/router part of wifi connections

So I have configured my ubuntu server to be router with dhcp functionalities and I want it to appear on other computers or devices as a choice for a network connection. My ubuntu router is currently ...
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37 views

Ubuntu server router network connections

Is it possible to make the ubuntu router part of the network connections so my device can connect to it and the ubuntu router can assign an ip address via dhcp. I have already configured my ubuntu ...
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Ubuntu server as dhcp router/firewall

I have properly configured the ubuntu server to have dhcp service and firewall rules. I also placed some firewall rules for testing. I just do not really know how to test it on lets say another ...
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47 views

DHCP IP Address / sub interfaces

I've setup a DHCP server for about 120 sub networks and it's working very well, it gives the right IPs from the right subnet / VLAN. The server listen to Eth0 which has the IP 192.168.111.20 and all ...
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How to create local DHCP server to give addresses to bridge ports?

How to create and setup local DHCP server(dnsmasq) via terminal to give addresses to bridge ports? For example I have bridge br0 and need to give some address to tap interface that connected to br0. ...
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69 views

Unable to setup a pxe server on Ubuntu VM (Virtual Box)

I am bit new to this and trying to setup PXE server on Ubuntu 14.04 VM using Virtual Box 4.3. For this I have followed following link for my installation: PXE Boot Server Installation Steps in Ubuntu ...
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14:04 Server: dhcpd/bind9 - (Static IP) Clients no longer have connectivity to external hosts

After following the linked guide from a fresh install of 14.04: http://blogging.dragon.org.uk/dns-with-bind9-and-dhcp-on-ubuntu-14-04/ I made an addition to /etc/dhcpd.conf so that I had a group of ...
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ubuntu isc-dhcp-server expected ip address or hostname

I recently replaced my windows server with an ubuntu one and I was setting up dhcp when I ran into this error whilst trying to add a 'reserved' client. expecting IP address or hostname Jun 6 ...
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Server Network DHCP Fail Kills Interfaces

I have a server with the current /etc/network/interfaces: auto lo iface lo inet loopback auto em1 iface em1 inet dhcp auto em1:1 iface em1:1 inet static address 192.168.168.1 netmask ...
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59 views

How can I connect my PC connected to WiFi on wlan0 to my oscilloscope on eth0?

Here is how I set up my network configuration on both devices For Linux comp: wlan0: WiFi Link set to DHCP eth0: Static IP: 192.168.1.254 Netmask: 255.255.255.0 Default Gateway IP and ...
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dnsmasq giving out IPs in the static range

I have the following in my dnsmasq.conf: dhcp-range=set:red,10.1.1.2,10.1.1.69,72h,static dhcp-range=set:blue,10.1.1.70,10.1.1.100,72h,static dhcp-range=set:white,10.1.1.101,10.1.1.200,12h ...
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How to fix my local ip address [duplicate]

I want my private IP address 192.168.xxx.xxx to be fixed and do not change, Is it possible? I am using Ubuntu 14.04. I need it to work even when I change the network? Thank's
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DHCP for multi netwok

I hope I well get help as I got always in this excellent forum. We have over 120 networks (192, 172 and 10 ranges)and at the moment our DHCP server is windows server 2008, which I would like to ...
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139 views

OpenVPN doesn't connect on Ubuntu, but works on windows

Cannot deal with openvpn connection. It works on windows, but on Ubuntu linux 15.04 script end 'Initialization Sequence Completed' and unaccessible .local resources. I checked many links and answers, ...
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Firefox/Clementine only use eth0 as gateway but not eth1

hy! I have two nics, that are configured via dhcp, internet is reachable via both: 1) 192.168.15.x gateway 192.168.15.1 2) 192.168.1.x gateway 192.168.1.1 Sometimes 1 is down via the firewall (as ...
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Dynamic IP with static DNS

Getting a dhcp'd IP ok, but DNS is not resolving. 2 part question: using nmcli how can I see what DNS server's I am using? where do I go to configure a STATIC DNS server for a wireless interface ...
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DHCP server on subinterfaces

I have created two subinterfaces on eth0 : eth0:0 with IP 192.168.10.1/24 eth0:1 with IP 192.168.11.1/24 Configured /etc/dhcp/dhcpd.conf like that: option domain-name-server 194.204.159.1; ...
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“Learning” DNS server

I recently used a Raspberry Pi as a router, including services like DNS and DHCP in addition to nat. "dnsmasq" works really fine, resolving the IP addresses stored in /etc/hosts. But it can't ...
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Landscape's OpenStack installation fails due to containers unable to obtain an IP

I followed this instructions and the instalation failed while deploying Landscape. I dug it up a bit and found that the juju containers are unable to obtain IP address: Apr 28 16:20:50 ...
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how do I configure dhclient for comcast /64 prefix?

I did have everything working, but when I updated my router to a supported version of ubuntu, it broke (Ubuntu 14.4) Where things go wrong is dhclient never grabs a /64. It either gabs the IP for ...
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DHCP Stopped working over Bonding

Something recent broke DHCP and Bonding. I used to be able to do this: # This file describes the network interfaces available on your system # and how to activate them. For more information, see ...
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how to set set up TFTPD and DHCP for PXE like booot

I am trying to setup tftpd and dhcp to assign IP address to router and then to pass the server and path to kernel image, which will be booted. All the guides I have located tell me to install and ...
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79 views

Try DHCP first, if it fails assign static address and use the machine as a DHCP server itself

As the title says, I have a tiny screenless Ubuntu server that I move around, that has two different behaviors and needs to adapt automatically, that is, without any human intervention, at bootstrap: ...
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198 views

Ubuntu 14.04 as router Destination Network unreachable

I am fightning with this for like 10 days now i really need to ask you guys, i hope someone has 5 mins time to explain me what i am doing wrong! For the start i wanted to configurate a router for my ...
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110 views

isc-dhcp-server: dhcp dynamically update dns records

i'm trying to dynamically update DNS records when DHCP give out addresses. but even though I have specified allow-update with a key in /etc/bind/named.conf.local and specified the same key in ...
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Reset DHCP IPs to beginning of range

Kind of a silly question, but I'm just curious as to how you'd reset the DHCP range of your server back to the beginning of it's designation. I've tried restarting the DHCP service, but to no avail. ...
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152 views

Dnsmasq and Iptables for routing

I'm using a Raspberry Pi with two ethernet ports as a router. The network looks like this. "Internet" <--(…)--> Fritz!Box <--(172.16.x.y)--> [eth1, dhcp] Raspberry Pi [eth0, static] ...
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beyond MAC address spoofing

Saturday, I am going to have to attempt to connect my notebook to a network that does not like me much. It is a school network. I work there as a volunteer, but don't have a sysadmin to explain what ...
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Hostapd with localhost server

I have hostapd and isc-dhcp-server working on my linux 14.04 box. My WiFi devices can find the hotspot and are assigned an ipaddress. At this point there is no connection through to eth0. I also have ...