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

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Can't get my DHCP server started

I am trying to start a DHCP server on my Raspberry Pi, however I keep getting the error below: pi@raspberrypi ~ $ sudo /etc/init.d/isc-dhcp-server start [FAIL] Starting ISC DHCP server: dhcpd[....] ...
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eth0 not in /etc/network/interfaces [duplicate]

I'm using Ubuntu 14.04 and my ethernet (eth0) connection is working fine. (with DHCP) However, when I read the /etc/network/interfaces, there is nothing about eth0 in it. Is Ubuntu 14.04 reading ...
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21 views

Unstable Wifi with Ubuntu 14.04 and Realtek Wifi Adapter

I've been fighting with this problem for a couple weeks now. I've made some progress, but haven't gotten to the point of a truly stable internet connection via WIFI. Unfortunately, the issue is at ...
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12 views

Config for direct network connection between 2 servers both with connection to switch

I have the following setup: Server 1 eth0 > Switch Server 2 eth0 > Switch eth0 on both currently uses DHCP where the DHCP server will assign the same IP each time, so they have static IPs. ...
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70 views

WiFi won't work, no matter what

Ok so I've been trying to troubleshoot this for a couple of months now but I just reached the end of my capabilities. The basic problem is that my wifi does not connect to my home network (at least ...
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21 views

Juju LXC Containers getting wrong DHCP?

I'm using a networking similar to this one: http://www.openstackbasement.com/maas-network-hardware When I run: juju deploy --to lxc:0 mysql juju deploy --to lxc:0 keystone etc... According to ...
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30 views

Create WIFI access point in 14.04 with bridge mode

Currently i am creating wifi access point using Unity’s default Network Manager IPV4 settings Shared to other computer and finally edited the file /etc/NetworkManager/system-connections/wifi-hotspot ...
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56 views

Internet Networking not working unless dhclient is run manually

Edit: Please note, this problem is caused from a broken package, and is talked about more in another post. If you need a quick fix to temporarily get back the internet to fix the problem, I recommend ...
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2answers
68 views

WiFi Problem in Ubuntu 14.04

The Problem: I have a dual boot setup with Windows 7 and Ubuntu 14.04. Everything was working fine until yesterday morning after login I couldn't get the wifi in ubuntu stopped to work (see details ...
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15 views

ubuntu vm unable to take ip via dhcp

I copied a ubuntu vm from an esxi server to a vmplayer. I want make the vm visible into the network so I enabled dhcp. My /etc/network/interfaces looks like this: auto eth0 iface eth0 inet dhcp ...
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10 views

LXC Application container networking ubuntu

My host system is behind a proxy which doesn't allow ICMP. Host has a static ip say 192.168.28.68 what should be the bridge ip configuration for the container? brctl bridge vanishes on reboot, kindly ...
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35 views

DHCP IP address changes automatically

My Dell precision M4800, running Ubuntu 14.04 LTS, periodically changes its IP address. It looks like the DHCP lease expires and for some reason it gets a new IP adress instead of renewing the old ...
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35 views

Unable to connect to the internet with Ubuntu 14.04 (eth0 doesn't get an inet addr)

I installed Windows 10 and Ubuntu 14.04 dual boot. They are both installed on separate physical hard drives. This isn't directly related to the problem but it does shed some light on it. The problem ...
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46 views

Configuring Home Network DNS/DHCP Server

To start off, I don't have a whole lot of knowledge of networking, which is why I'm trying to learn by example. I recently just built a new computer to toy around with new projects. This machine has ...
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28 views

dhcp server without internet

enter image description hereenter image description hereGood morning everyone ! I have a project virtualized servers in VMWRARE Esxi. My physical server has two network cards. Eth0 is on my firewall ...
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17 views

Mail and dhcp server in a closed network

Here is my needs; I need a mailserver (with one account) that can receive mails from several other systems on a closed network (no internet access after installation) and two network interfaces. ...
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83 views

eth0 changed to eno1 and 70-persistent-net.rules is missing

I booted up Ubuntu, noticed I had no internet. Ran ifconfig, eth0 is now eno1 and has no IP. I ran dhclient eno1, no DHCP server found. Went to check 70-persistent-net.rules, it's gone. I rebooted ...
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12 views

Read code plug before client send dhcp discover

I have a program that reads in the code plug external pins to determine the desired IP address of a particular device. This program will then update the /etc/dhcp/dhclient.conf file with the correct ...
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35 views

isc-dhcp-server randomly stopped working and won't start again

I've been running isc-dhcp-server on Ubuntu 12 for a few months. This morning it stopped issuing IP addresses (no configuration changes from when it was working). I had local IT reboot the box ...
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38 views

Daemon.log/Syslog files getting spamed with DHCP Information

I have a linux VPS that's been running fine for 5 months now, up until about a few days ago. I get weekly reports on my server, and on the 03/01/2016, I had used 4gb of space, with 16gb free (20gb ...
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50 views

MaaS server with local kvm - How to bridge to dhcp interface

I have a MaaS server, it has two network interfaces. One external eth0, and one for the internal network eth1(Nodes network). eth1 is where the DNS and dhcp server managed interface. I want a mix of ...
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10 views

Updates posted by Canonical don't always work

Early 4.2.0 releases did not allow me to use ctrl-alt-t or ctrl-alt-l ... If I use 4.2.0.23 the network does not come up (DHCP fails). I get on the air with 4.2.0.22 in recovery mode ... all the above ...
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46 views

Multiple NIC's, Multiple Subnets, and Multiple Gateways

It's time to ask the pro's, as I have read all of the answered questions, tried numerous suggestions for related questions on the forums and I cannot seem to get this right. Question: How to allow ...
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11 views

Is it possible for dns records to update for vpn clients?

I have an Ubuntu server than runs routing, bind9, dhcp, and vpn. Everything is working like it should. I would like to add the ability for vpn clients to register a DNS record so that I can resolve ...
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How to create Ubuntu services alert by mail (Like when dhcp, nagios,ftp services down we should get mail)?

How to create Ubuntu services alert by mail (Like when dhcp, nagios,ftp services down or exceed we should get mail)?
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29 views

How can I find out my system's DHCPv6 DUID?

I would like to assign a static IPv6 address to my machine running Ubuntu Server 15 using DHCPv6. To do so, I need to know the DUID used by the DHCP client so I can assign the static IP to it in my ...
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17 views

persistent share w/ dhcp server

i'm trying to do something simple here that is mostly done - establish a share from an ubuntu 14.04 server with 14.04 and windoze clients. the only problem is that since the server ip address ...
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37 views

Wired LAN no longer works

My wired LAN (eth0) no longer works in Ubuntu. WiFi thankfully works fine. Different configurations tried have been: static IP, to a device with a static IP (same subnet and subnet mask). DHCP to ...
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36 views

Why does Ubuntu start up with the PXE rom?

I have Ubuntu installed on my Raspberry Pi. However when I start the Pi it shows a message from PXE ROM. First it shows: DCHP ... / (with the slash rotating to indicate activity) and then it shows ...
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29 views

TurboX WLR-302 repeater

I am trying to install the TurboX WLR-302 repeater in my Ubuntu operating system. The IP of the repeater is 192.168.10.1 and the IP of the router is 192.168.1.1 > I am setting it up manually and need ...
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54 views

Route traffic beetween LAN / WAN interface

we use an internal little server with a dhcpd service (pxe system). The server has two nic's: - LAN (PXE) - WAN (uplink of remaining company lan / network) WAN NIC is auto configured by DHCP server. ...
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Server w/ 2 nics/subnets. Only 1 accessible at once. broadcast and ssh needed on different nics

What I want to have: 1) I need the server to be able to broadcast a Wake-On-Lan Signal to the client network (10.121.1.0/24). 2) I need to access the server via its server ip 10.133.1.3 using ssh ...
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Networking not working anymore wifi or ethernet

I installed nvidia-340 which left my screen black and Ubuntu running in low graphics mode so I removed it, after this network-manager would crash on startup, I ran ifconfing to see which interfaces ...
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37 views

Ubuntu server 14.04 LTSP client network need help please!

I have a server system w/ 2 NICs that was installed with ubuntu server 14.04. I am trying to get a network of thin clients set up based off of this guide http://moo.nac.uci.edu/~hjm/LTSP_HOWTO.html ...
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74 views

Wifi connection timeouts on certain wifi access points

I have a Dell Precision M4400 laptop with an Intel Wifi Link 5100, running KUbuntu 14.04, which I use almost exclusively on wifi, either at home or on one of the many free wifi locations out and ...
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25 views

MAAS images register with “ubuntu” hostname in the DNS

I have set up a MAAS server (last stable 1.8.3) with an external DNS and DHCP and everything seems to work fine except for a minor issue deploying the Ubuntu 14.04 LTS image. During the deployment ...
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15 views

Resolve domain names to IP's based on physical adapter

System Configuration eth0 NIC to the LAN/WAN/Internet (working, don't want to mess with it) eth1 NIC eth2 NIC Objectives Assign a static IP to eth1 and eth2 and assign IPs (DHCP) on separate ...
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42 views

Bind9 basic configuration for internal network with windows pcs

I have a network with more than 50 PCs running on Windows, Mac ans Ubuntu. We have one internal Web Site running in a windows 8 PC IIS on the IP 192.168.0.110. Right now we all can access this ...
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Need Advice Reporting DHCP Client Bug

I'm using Ubuntu 14.04.03 LTS on ARMv8a. I've had issues because of a route metric being incorrectly set to "1" (an IPv6 setting) when the network and everything in it is really a metric of "0" (IPv4 ...
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34 views

USB WiFi adapter problem :(

I recently installed a headless ubuntu headless server on a microserver I recently got for learning purposes. The main problem I'm having at the moment is connecting to my home network. I'm ...
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57 views

DHCP get wrong ip

I have ubuntu14.4. recently I faced a problem that I haven't before. in my university when I want connect to internet, first I should connect to a access point and then connect to the internet through ...
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243 views

Virtual Box Have No IP Address error Show When Start Genymotion Device

1 down vote × Thanks for the feedback! Once you earn a total of 15 reputation, your votes will change the publicly displayed post score. The responsible thing that is assigning dynamic IPs for you is ...
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31 views

How to use DHCP if available, otherwise use static IP

When my system boots it should check for a given interface (e.g. eth0) whether a DHCP configuration is possible respectively if DHCP server exists within the network. If yes, DHCP should be used. If ...
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121 views

How to set up a transparent proxy on my home network

So I'm still a beginner in terms of setting up servers, and I have some questions regarding the way that the server gets hit. So my current network architecture looks like this: [internet] <-> ...
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18 views

Waiting for network configuration with one nic and virtual nic

I have Ubuntu 14.04 and one nic. I need to make two networks, one for world outside and one my own. I installed isc-dhcp-server and it seems nicely configured. It has spool 192.168.1.0 So do I have ...
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31 views

sharing ethernet connection by preserving external DHCP server

I am currently using two workstations at the University, but I only have one single ethernet cable providing internet connection. One of the two workstations (running Ubuntu 14.10) has two ethernet ...
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63 views

KVM Network Setup

This is what I want to achieve: KVM Host: Obtain IP via DHCP ssh connect via hostname (VM-host hostname) Ubuntu Server 14.04 LTS Sitting in a LAN, not reachable via internet Has one physical ...
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116 views

Ubuntu Server 14.04.3 NAT DNS Configuration

I have a Ubuntu Server 14.04.03 configured as a NAT Gateway using ISC-DHCP-Server. There are around 50 client PCs that access the internet through it, most of them running Windows. I want to use the ...
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54 views

ubuntu 14.04 LTS change dhclient lease file location

I cannot find how to change dhclient lease file location. By default (and currently) it is in /var/lib/dhcp, but I want this file to go to another place. I did ps ax | grep dhclient and got this ...
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237 views

Why is my DHCP Server not running

I set up my /etc/default/isc-dhcp-server and set eth0 in /etc/dhcp/dhcpd.conf Why is the isc-dhcp Server not running? When i execute sudo service isc-dhcp-server status, i get this: root@ubuntu:~# ...