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

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DHCP on commit script not running

So I have a basic DHCP set up - option subnet-mask 255.255.255.0; option broadcast-address 192.168.0.255; option routers 192.168.0.254; subnet 192.168.0.0 netmask 255.255.0.0 { range 192.168.0.15 ...
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24 views

ISC DHCP Different DNS Server For Different Client OS

Is it possible to configure isc-dhcp in a way that it can send different DNS server addresses to different clients in the network? Let say I have some Macs, PCs with Linux and Windows in the ...
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53 views

Can't set a permanent static IP address through network/interfaces

I'm running Ubuntu 12.04 on a laptop computer that always lives in my house and for which I would like to set a static IP address (so I can access it remotely). I have tried following steps outlined ...
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25 views

assign static ip address on the server, or based on MAC address?

For an Asterisk VoIP server, is there any technical advantage to setting a static IP address directly on the server, versus using DHCP and having the DHCP server (router) assign a static ip address ...
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20 views

How to connect multiple subnets

I have a server with 4 ethernet ports: 1 used to connect to internet e 3 used to manage 3 local subnets. I configured the DHCP server, the routing, packet forwarding for IPv4 and NAT; everything ...
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Ubuntu DHCP For real time devices

I have a cisco switch (2960 series) and a cisco router (1800 series). In the switch I have configured VLANS 10 and 20. I am trying to setup a Linux (Ubuntu) dhcp server that will assign IPs to each PC ...
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1answer
18 views

Unable to run 2 ethernet connections at the same time

I have a workstation with the two ethernet ports (eth0, eth1), the problem is that i cannot run with both ports up and running. I can run with either one of them, but not both. auto lo iface lo inet ...
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Installation of Ubuntu server with proxy settings

I have been installing the Ubuntu 14.04 server. During the installation process, it asks for network configuration. I have proxy set up in my college campus hence I donot know about the IP address ...
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57 views

Ubuntu 14.04 DHCP client not updating Windows DNS

We have a set of Windows 2012R2 domain controllers which provide DNS and DHCP service for the network. I have an Ubuntu 14.04 server which is getting addresses via DHCP. This works correctly. In the ...
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44 views

DHCP server not running

I have this : $ sudo service isc-dhcp-server start isc-dhcp-server start/running, process 7202 $ sudo service isc-dhcp-server status isc-dhcp-server stop/waiting I have two interfaces (eth0 and ...
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Raspbian and Ubuntu 14.03 SSH error

I have installed Raspbian Wheezy on a 8GB SD card( using win32disk imager,did it on my windows 7 laptop), next I changed dhcp to static IP, gave a random IP address to my raspberry pi along with ...
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Can't Set DNS by DHCP

OS : Ubuntu Server 12.04 After Compile and Install Unbound and depends Library.. resolv.conf always return 127.0.0.1. Files on /etc/resolvconf/update.d not have contain 127.0.0.1 File : ...
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Configuration file where set the interface which get ip address from dhcp

I'm running Ubuntu server 14.04 on a VM in VirtualBox. It has a nested DHCP which assign ip addresses to interfaces of the machine. The default behaviour is to assign ip address to eth0 interface. I ...
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32 views

Setting Up a Routing Table for a Router

I have two network interfaces on my server. They are: eth0 - 192.168.1.2/24 gateway 192.168.1.254 eth1 - 192.168.2.254/24 no gateway as this interface is the gateway for this subnet I want ...
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31 views

IPv4 is not getting configured on Ubuntu in a dualstack (IPv4/IPv6) network

I set up a router with IPv6 capabilities (I replaced the firmware with OpenWRT) as my main router and successfully configured DHCP including static leases. Almost everything works fine, all IPv6 ...
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1answer
25 views

How to configure a conceptronic (C100S8) switch for Maas?

I thought I had an issue with network configuration, but it turns out I didn't (previous question). The problem is with my switch. As stated in Maas 1.5 doc there are some issues with STP on certain ...
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1answer
60 views

Supersede default route to other network interfaces

I have two network interfaces: wlan0 and eth1. wlan0 connects to a camera over WiFi, getting all it's info from the camera's DHCP (the camera itself hosts its own network). eth1 connects to the ...
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2answers
60 views

dhcp server setting

I have a ubuntu desktop (running on a raspberry pi) that is configured with dhcp on eth0. This device comes from an environment where they use a server to route all the internet trafic and dhcp ...
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29 views

2 dhcp servers on same network

I have a Bell home router that doesn’t support port forward ranges , just single ports. It does have DMZ though so.... I was thinking of having my Ubuntu 14 headless run a DHCP service and then doing ...
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1answer
310 views

Network eth0 DHCP, static ip and autonegotiation issues

Background I am running an Ubuntu Server on 14.04 which is currently up-to-date. I have only one network device connected to it. When I use my Ethernet cord and connect it from the wall to my laptop ...
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32 views

DHCP not keeping IP at reboot

I have a computer with Ubuntu 14.04 LTS and Windows 8. Last week we had network problems in the place I work and the machine was moved to another sub-network and then brought back to the initial one. ...
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139 views

Stuck at getting IP configuration

Recently, whenever I try to connect to Ethernet, Ubuntu detects the LAN wire but takes a long time(about 10min) to get the IP address. Output of nm-tool: Type: Wired Driver: r8169 State: connecting ...
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101 views

Ubuntu 14.10 VirtualBox guest doesn't get IP from DHCP

I'm running Ubuntu 14.10 as host, and have tried a couple linux distros as guests, including Ubuntu 14.10. Each exhibits the same symptoms: they fail to configure the second network interface. ...
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239 views

Setting a permanent static route with DHCP

I am trying to set up a machine on a local network that uses a permanent gateway and DHCP. I can't set the IP static, but need to add the route inserting the gateway. When I try a "route add" command, ...
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99 views

Unable to boot ISO over PXE with Clonezilla server

I've got the Clonezilla server running and when I boot my VM from my other laptop it looks like it's trying to do something; it just hangs for a while at a screen that shows me a read out of my MAC ...
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51 views

why i don't receive DHCPDiscover message from server using dongle and why same code give DHCPNac on wifi

I have written a script using perl and i have tested it using two different ways: Using a wifi connection (I have router which is directly connected to server and i am connected to that router). ...
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21 views

Multiple networks with DHCP prioritizing one

I'm trying to setup a client machine connected to two networks, both going out to the internet. Both networks, eth0 and vlan (eth0.8) should use DHCP. I want to use all the domain-name-servers, ...
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1answer
125 views

14.04 LTS - Wifi Drops in 1500 - 1800 seconds - DHCP lease get renewed

Wifi drops regularly. And tried Adding in file /etc/modprobe.d/iwlwifi.conf options iwlwifi 11n_disable=0 -> (Did not work) Uncommented: in file /etc/dhcp/dhclient.conf send dhcp-lease-time ...
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54 views

Ethernet connection not working (1 Gbits/s - worked good before)

I have a quite annoying problem : since few days (around 2 months) my linux ethernet connection is not working (it worked good before, don't know why it's not working anymore). I have a dual boot ...
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2answers
547 views

How to configure a static IP address, but DNS via DHCP

I've configured a static IP address in file /etc/network/interfaces: auto eth0 iface eth0 inet static address 10.152.187.122 gateway 10.152.187.1 netmask 255.255.255.0 But I'd like DNS ...
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252 views

How to configure /etc/network/interface to use static IPv6, but dynamic IPv4?

I want to add a static IPv6 IP to my otherwise automatic IP configuration. How to do this? Currently I use: auto lo iface lo inet loopback auto eth0 So IPv4 is configured by DHCP, IPv6 is ...
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65 views

How to check if MAAS-DHCP service/daemon is running?

We've configured MAAS to handle DHCP on our network. It was working fine for a while but suddenly MAAS refuses to respond to DHCP requests. How to debug this? Are there any logs I can check or is ...
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116 views

Ubuntu server can no longer get address from DHCP

A couple of years ago, I set up an Ubuntu server with RAID to act as a home file server. All was well until last week, when my other computers could no longer access the files. My problem is ...
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Network fails and won't reinitialize Ubuntu 14.04

I have a freshly installed Ubuntu-Server 14.04 instance. Nothing is installed yet other than the base system, OpenSSH server, and LAMP server (as selected in the install process). It is connecting ...
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93 views

Can't connect to internet after starting DHCP

I install isc-dhcp-server to connect with my Parallella board via ethernet cable, and I'm using internet via wifi. However, after starting DHCP server, I can't connect to the internet. I checked the ...
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41 views

dhcpd server not listening to second interface

I have a 12.04 server which is happily responding to dhcp requests on eth1 (172.16.1.1). Now I have set-up a second interface on eth2 (172.16.2.1). I can ping this interface all right and even ...
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140 views

PXE Boot Ubuntu 14.10 thinks eth0 link is down

I'm having problems booting an Ubuntu install over PXE. After a while, I get the error: Gave up waiting for the root device After that, I get dropped to a busybox shell. ifconfig shows nothing ...
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116 views

Public IP address hides device from network

I have flashed a mini-image of Ubuntu 14.04.1 LTS onto my BeagleBone Black. (Find latest BBB image). The BBB is connected to my home Router via Cat5 AND USB cables. Understandably, I can directly SSH ...
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197 views

How to Fix the Intermittent Ping Time out

I am back with a new Question. Its weird as always. My setup is as follow; 2 Ubuntu 12.4 LTS Servers. / LynkSys POE Switch. / 01 LynkSys Router / 3 Proxim APs. The APS are connected via Cat6 to ...
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173 views

How to configure bind find dnsmasq addresses

My PC server runs Ubuntu 14.10 It runs dnsmasq only for the DHCP services since DNS queries are resolved using bind An entry like dhcp-host=01:02:fa:04:38:7a,192.168.1.113,camera exists for an IP ...
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182 views

Minimal installer cannot use network

How would I install a bare-bones Ubuntu and get the network connection working on a system where the installer behaves as described below, seemingly as if it was not connected to a network? When I say ...
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1answer
50 views

Ubuntu Server , Installed Hdd into another computer and now have no internet connection

EDIT: NVRM I figured it out on my own.. I needed to edit a file and remove the Previous eth0 and then rename my eth1 to eth0. I would like to set a static IP adress though if anyone wants to help me ...
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1answer
254 views

Configuring DHCP-Server using dnsmasq [closed]

I can't seem to make my DHCP Server (dnsmasq) work, even though there are so many tutorials on the internet. Somehow something doesn't work out for my setup. What I have: A computer, a laptop, a ...
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496 views

Setting up hotspot with hostapd & udhcpd on wlan0 with internet on eth0

[Ubuntu 12.04] I am trying to achieve a simple configuration that uses the Internet from eth0 and sets up a hot-spot on wlan0. But my requirements has constraint of not using NetworkManager. And I am ...
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118 views

Unable to set up DHCP and TFTP

I want to transfer my kernel image to beaglebone black, and the guide mentions that I should have already set up DHCP and tftp on the host machine. I have set up the TFTP using: sudo apt-get install ...
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76 views

How to undo eth0 configuration?

I was trying to connect 2 Ubuntu vms on virtualbox. they had the same ip address: 10.0.2.15 with default gate: 10.0.2.2 I tried to change this manually, and here what I did: on the edit connection ...
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409 views

Ubuntu 14.04 not using alias em1:1 address

I'm trying to use two IP addresses on a single network device. The device is an onboard NIC and came up as "em0" after initially booting, something I hadn't seen Ubuntu do before. I'm using a ...
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142 views

Ubuntu DHCP client doesn't report hostname

I found, that my Ubuntu server does not report it's hostname to DHCP server (which is different machine). Why and how to fix? /etc/dhcp/dhcpclient.conf is follows: option ...
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54 views

VM workstation 10- Ubuntu 14.4 client- need to run DHCP client

VM workstation 10- Ubuntu 14.4 client- need to run DHCP service - on host machine, the host is connected wirelessly on another network. I have a switch that 4 or 5 other machines will be connected to ...
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39 views

Why does OpenVPN Access Server have two Virtual Interfaces?

I am trying to configure OpenVPN Access Server to allow connected users to access resources on the host machine and I am a bit lost with the use of two Virtual Interfaces. Why does OpenVPN Access ...