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

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how to cilents gets ip addresses during booting time via dhcp server

i have installed dhcp server and working fine. when I open terminal on clients side they got the address. but the problem is that when i boot the cilent machines they didnt get dynamic address dnot ...
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116 views

configuring dhcp with dynaminc ipv4 and ipv6 address

i just want to know that is that possible to configure dynamic ipv4 and ipv6 address on eth1. i tried ipv4 is working but ipv6 doesn't. if yes then how. If not then what should i do. Because i want ...
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89 views

Is this normal MAAS DHCP behavior?

I believe I've setup the Ubuntu MAAS cluster controller correctly and it's configured to use managed DHCP & DNS (maas-dhcp & maas-dns). Seems to work reasonably well but I'm seeing the ...
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2answers
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How can I cut the mac address out of DHCPDUMP?

I am trying to use dhcpdump to recognize people logging onto my home network and give them a tailor made greeting using a credential file. I cannot get the mac address out of the results of dhcpdump. ...
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51 views

DHCP-Server issue-DHCP-SERVER IP

I’ve setup 2 new DHCP servers (failover mode) with about 120 VLans. Everything is working perfectly a part from 1 thing. The main (physical) interface (eth0) has the IP 172.16.1.11/24 and all other ...
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1answer
77 views

No internet connection over cable (but wifi works) [closed]

I have Ubuntu Desktop 14.04 installed on MSI GT660. I am Linux newb. I can connect to internet using wifi but not over cable. contents of /etc/network/interfaces: # interfaces(5) file used by ifup(...
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21 views

issue with dhcp default network file

I'm installing dhcp server on Firewall and under that firewall i setup two clients who ll get dynamic ip addresses. I give static ip address to eth1 port on which i'm installing dhcp server on ...
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41 views

Monitoring tool for Ubuntu

I am running a Ubuntu server for NAT and DHCP services in my Office. What monitoring tool can be used to remotely monitor server performance, DHCP lease addresses, IP Lease statistics, monitor ...
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260 views

No network in recovery mode

I have some problems with the display, so I need to go into recovery mode to repair that. Now the problem is that I can't get the Internet to work. After I get in the command line as root, I do ...
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101 views

Change virtual box ip from 10.2.x.x to 192.168.x.x

I have applications and xampp setup on virtual box with ubuntu 12. The ip address for virtual machine 192.168.x.x but after installing vmware ,ip change for virtual box to 10.2.x.x I want to change ...
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934 views

Ubuntu 14.04 with Gnome 3, Network Manager issue

I have been trying to update the network setting of a fresh install via the GUI but am seeing this error: error editing connection: did not find a connection with UUID '(null)' The Network Icon in ...
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136 views

How to MAC-Nat in Openflow/Openvswitch?

I got one simple Question as in the Title ... how can i achieve a MAC-Address-Translation in OpenFlow? I need to capture DHCP Packets that are destinated for the MAC of the public interface and give ...
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29 views

Neutron OpenFlow L2 Address Translation Mac help

Like the title says i need help configuring OpenFlow on my Network Node (Openstack). The pain is that the Server Hoster i am using, uses a DHCP-Server that binds IPs to MAC Adresses. Now they say, ...
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1answer
82 views

Connect Ethernet network to Wireless network on one computer

I have access to the internet via ethernet port. I've been given a WiFi dongle and a task to implement WiFi access point that devices can connect to and use internet trough the ethernet port. So far I'...
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1answer
242 views

Restricted internet access on 14.04. Teamviewer works, websites don't load

I now know it is not a DNS issue, because I can't even ping 8.8.8.8. I've added the output of tracepath 8.8.8.8. My machine running the most up-to-date version of 14.04 Trusty. The mobo has two ...
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58 views

(Neutron Openvswitch) bridge cant obtain dhcplease

I am trying to bridge my external network ... for that i have to give my eth1 (external) 0.0.0.0 and the bridge the public ip. after that i start dhclient br-ex ... dhclient tries to find an offer ...
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956 views

Configure dhcpd to listen on a bridging interface only for ipv4

I am trying to achieve the following behavior of the dhcp server. a) I would like the dhcp server to listen only on a particular interface. In this case the interface is a bridging interface br0....
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784 views

Wifi shared through ethernet cable [To Raspberry Pi]

I have a laptop connected to wifi. I would like to connect my Raspberry Pi to it with an ethernet cable and have access to internet thanks to the laptop connection. The laptop runs Ubuntu 14.04.2 LTS, ...
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245 views

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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26 views

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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89 views

How to stop network manager changing my gateway?

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 192.168....
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53 views

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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349 views

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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470 views

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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343 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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182 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 0.0....
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56 views

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 low-...
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727 views

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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1answer
91 views

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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17 views

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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43 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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76 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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243 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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50 views

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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1answer
544 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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1answer
137 views

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 01:47:...
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74 views

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 255....
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88 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 ...
3
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1answer
200 views

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 dhcp-range=...
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469 views

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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1answer
517 views

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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2answers
483 views

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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369 views

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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1answer
229 views

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 juju-machine-...
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263 views

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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491 views

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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0answers
101 views

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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160 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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1answer
787 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 ...