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

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Ubuntu 16.04 desktop DNS configured over DHCP resolves only sporadically

Hi there I just freshly installed Ubuntu 16.04, gnome edition. In my network, a Windows 2012 R2 server is AD, DHCP and primary DNS. My router is secondary DNS. My client picks up the right addresses ...
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26 views

Static IP address on Ubuntu 16.04

I want to have the ability to edit my static IP on Ubuntu 16.04 Desktop using only CLI. However, when I do that I have two IP addresses for the same machine: one is assigned by DHCP server and the ...
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IPV6 autoconnection - Decline/Release message

During autoconnection with v6, in case of a duplicate address resolution, decline message is sent, but 6 sets of solicit-advertise are going through before release? Is this according to RFC?
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Ubuntu 14.04 LTS server port forwarding

I have isc-dhcp-server installed on my Ubuntu 14.04 LTS Server. I also have a vonage phone and HP printer. When connected to my server they receive IP addresses but they cannot communicate with their ...
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7 views

Node in MAAS FAILED_COMMISSIONING

I am trying to add a node to the maas cluster. Maas controller is able to wake the node and start commissioning. But it fails at the end and shows the error FAILED_COMMISSIONING. Here is the log from /...
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24 views

Debian Server not receiving IP from DHCP [closed]

I have configured a DHCP server on Windows Server 2012 which is connecting to my Debian server on virtualbox. They are connected on same line. I changed eth0 to receive IP address from a DHCP server ...
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14 views

DHCP Client unable to ping other static ip server

I have just setup my DHCP Ubuntu server 14.04 and my Windows client is able to grab IP from the DHCP Ubuntu server. But after that the Windows client only able to ping the DHCP server and not other ...
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1answer
15 views

Ubuntu VM not able to get an Ip address

I have an ubuntu 14.04 VM in virtualbox on a Windows7 host. I was using NAT and it was working fine. Switched to bridged adapter and its no longer has internet access when i am on office wifi. Works ...
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I want to run a DHCP server in my ubuntu 12.04 and need to share internet on same PC's another NIC interface

I want a DHCP server on my ubuntu 12.04LTS - ETH0 interface and need to share internet on ETH1 interface. Is it poosible? If yes, provide configurations for DHCP server configuration and sharing ...
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20 views

DHCP server isn't responding to DHCPDISCOVER request [closed]

I am using a linux distribution security onion as a virtual machine over windows 7 host via virtual box. This vm is unable to get any ip address from the dhcp server. That problem results from ...
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11 views

Providing Static IP doesn't let FTP and VNC work

I sometimes use FTP to browse the contents of my phone using "FTP Server" app in android. I wanted to provide static IP to the network so it doesn't keep changing and I can remember just that one and ...
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1answer
39 views

How to fix ifconfig eth0

I followed a step from this answer: 1 down vote Your problem is no default route is available as you see (route commanr response). This isobviously because of dhcp failed. So now you can set ...
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40 views

DNS points to wrong address intermittently

I'm not sure whether this is the right site for this question, but the problem does involve an Ubuntu machine. The machine name is nanolinux and it's our new dedicated database server. Usually when I ...
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30 views

DHCP server setup and controlling a DHCP client in the form of a laser scanner

I have set up a DHCP server on my computer(Ubuntu 14.04) .I have viewed my 'connection information' and gave the following parameter values in my /etc/dhcp/dhcpd.conf file subnet 192.168.3.0 ...
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1answer
23 views

Run script after DHCP acknowledge or after succesful WiFi connection

I would like to register a callback script, which would fire after DHCP acknowledge. Polling is an option... Is it possible at all, without driver/kernel modification?
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1answer
26 views

Adding static route with DHCP

I have a dilemna. I wish to add a permanent static route to a machine that is using DHCP to obtain the DNS server address. To further explain, when I use DHCP I must request both IP address and DNS ...
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19 views

Ubuntu 14 cannot connect eth0

I just reinstalled Ubuntu 14. I can't seem to get it to connect to my router... When it powers on, I see it saying in blue letters "waiting for network configuration" or something. When it eventually ...
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44 views

How to setup DHCP relay in ubuntu?

I am new in Linux, so please ignore if my question is silly. I am setting up 4 machines. Two machines are the servers and two are client computers for testing purposes. I am using my Ubuntu machine as ...
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1answer
25 views

Two network interfaces assigned to addresses from two DHCP servers

If we have an Ubuntu box with two network interfaces (NIF1/2) connected with two other DHCP server boxes (DHCP1/2) below, DHCP1 192.168.1.1/24 <---> NIF1 DHCP2 192.168.2.1/24 <---> NIF2 so we ...
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Can't Set Static IP - Ubuntu 14.04.03 - Server

I am configuring a few servers all with the same basic configuration. We first set the DNS/Domain in /etc/resolvconf/resolv.conf.d/base cat /etc/resolvconf/resolv.conf.d/base domain domain.com ...
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2answers
69 views

How to configure 2 interfaces without losing Internet connection?

I am using Hyper v for my linux lab. I have Ubuntu Server 16.04 which contain 2 network cards that shown in the system as 2 Interfaces. eth0: I configured it to get IP from DHCP server (my dlink ...
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3answers
51 views

Access Ubuntu Webserver from behind DHCP Router

I've just successfully installed and setup Ubuntu Server 16.04, complete with webmin, phpmyadmin etc. I can access this via remote login/ftp etc from other pc's within the home network but I'm not ...
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33 views

bind9 + dhcp clients

I've got a working bind9. I followed this tutorial to setup. It works fine with all static IP, that I fix in /etc/bind/db.* files as tutorial recommends. My router enables DHCP also and there are many ...
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0answers
25 views

Random loss of static IP (multi-homed setup)

I have few Raspberry PIs installed Ubuntu Mate 15.10 and configured them with both DHCP and static IP addresses on eth0. The /etc/network/interfaces looks like this: # interfaces(5) file used by ...
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1answer
69 views

Cannot access the Internet even though ethernet is connected? DHCP problem

I am currently running Ubuntu 14.04 on my Lenovo z500 laptop. I use the same laptop at my work and at my home. MY work place uses a static IP so I have to manually set my IP address in the network ...
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17 views

Hostapd error while starting

I have disabled network-manager for using my wlan1 interface in oder to have it "free" for hostapd . This is my ifconfig info for wlan1. wlan1 Link encap:Ethernet HWaddr UP BROADCAST ...
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39 views

nameserver in resolv.conf not getting updated

I'm trying to use a dns service on my xenial. I have added the following line to dhclient.conf. prepend domain-name-servers 208.67.222.222,208.67.220.220; After reconnecting or rebooting resolv....
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1answer
137 views

VM Ubuntu Server 16.04 no network connection with static IP

My Setup: Oracle VM Virtual Box running on a windows 7 box Virtual hosting is enabled in Windows Box BIOS Steps taken: With Dynamic IP assignment the the Ubuntu server can ping everything. No ...
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20 views

How to add dhcp client to verify that dhcp server which i installed on my ubuntu is working

I have installed DHCP server on my Ubuntu system. I have started it and now it's run on running state. I want to add a client to it to verify that the range of addresses. What should I provided ...
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130 views

How to specify additional search domains for resolver in 16.04 when using DHCP?

With Gnome Ubuntu 14.04, it was possible to specify additional search domains for the resolv.conf, when editing a network connection, like so: But where do I find this field for the "additional ...
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1answer
44 views

How do I get static IP working?

I have two PCs running Ubuntu 16.04 (one 32bit one 64bit) and a old TRENDnet TW100-S4W1CA router. The problem is that when I set the IPv4 address to "manual" the connections gets initialized just ...
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42 views

eth0 not working anymore after trying to set static ip

Hi I tried to set up a static ip and have lost the ability to use eth0, I can see that it is there but disabled, tried the edit with the auto eth0 and DHCP but to no avail, been trying all sorts of ...
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1answer
66 views

Bridge does not get IP from DHCP server on boot

I have a bridge created on my ubunut 16.04 box. The bridge does not get an IP from my DHCP server on the network on boot. /etc/network/interfaces : # interfaces(5) file used by ifup(8) and ifdown(8)...
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160 views

setting up ethernet port for DHCP in Ubuntu 16.04

I have just installed Ubuntu server 16.04 and as per new scheme the default ethernet port is longer named eth0 but is named as enp02s. But this port only gets configured with a private ip address such ...
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700 views

Ubuntu 16.04 - system boot waits saying “Raise network interfaces”

I have an Ubuntu 16.04 system with two interfaces - eth0 configured with DHCP and eth1 configured with static ip addresses. The /etc/network/interfaces file has the following config # The loopback ...
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17 views

ubuntu isc dhcp gives ip only once

My system is a Ubuntu PC with 3 thin clients that are connecting through ltsp to it. There is also a router inside this network so there are 2 DHCP servers inside the network. I've set the IP ranges ...
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88 views

Can't resolve hostname by ip address over nslookup

Hope, someone can help me. I've already searched the web for hours, but I can't solve this problem: I've got an Ubuntu Server on my LAN. I can fully use it (samba, ssh, apache2, xmpp...) by using it'...
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48 views

Route traffic from eth1(local network) to eth0(external network) where ubuntu is dhcp server

I have an ubuntu server which is configured to be DHCP server to give IP address to a cisco switch through eth1. eth0(connected to the external network) ip:10.106.24.182 netmask: 255.255.255.0 ...
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1answer
31 views

How to restore DNS being automatically obtained?

After a reboot I can no longer connect to the internet in the sense that it appears DNS lookups immediately fail. I am connecting via WiFi to my phone, which works as a dongle (I have no landline ...
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1answer
88 views

How to release an IP address and renew from the commandline?

I am using modern versions of Ubuntu that use network-manager, and I would like release and renew my network settings through the commandline. In the olden days when Ubuntu used the interfaces file, ...
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1answer
304 views

DHCP connection does not set default gateway automatically

I just did a fresh install of Ubuntu 16.04 (Xenial). I've configured /etc/network/interfaces to bring up the wlan interface automatically using DHCP: auto lo iface lo inet loopback auto wlp2s0 ...
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3answers
19k views

Set static IP Ubuntu 16.04

I am a new with Linux, having years experience with Windows servers/desktops and am having issues setting a static IP. I am using a method used for previous versions of Ubuntu, which doesn't seem to ...
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Multi-NIC client w/ isc-dhcp-server & dynamic bind9 recommended configuration

I have a properly installed and configured isc-dhcp-server & bind9 box that is correctly updating DNS records based on leases. This works well. I understand how the isc-dhcp-server can be ...
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0answers
16 views

Is it possible to offer a DHCP lease between 8am and 5pm and block access otherwise?

I am wondering whether dhcpd can be setup for some leases to only work between certain work hours instead of 24/7. I know I could use CRON and restart the DHCP server with configuration A (allow ...
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2answers
226 views

UBUNTU DHCP not assigning IP address to clients.

I have a minimal knowledge about ubuntu. I am trying to run a DHCP server on UBUNTU so as to share Dongle 3G Internet. I disabled router's DHCP and followed the following guide to setup DHCP server in ...
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14 views

Ubuntu 14.04 Server DHCP issue

I'm running Ubuntu 14.04 Server 32-bit. I installed with the option 'Minimal Virtual Machine' and I'm running the Server on VMware Workstation 12 on Windows 10. I'm seeing a strange issue with DHCP ...
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63 views

Can I force dhclient to use the client identifier from /etc/network/interfaces

I'm using Ubuntu 12.04 LTS with isc dhclient version 4.1. My goal is to use DHCP to get IP addresses for multiple sub-interfaces on eth0. I have three stanzas configured for that in my /etc/network/...
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1answer
2k views

MAAS interface eth0 (External) and eth1 (internal)

I have two interfaces configured in MAAS under Cluster eth0 - external IP VLAN 10 eth1 - internal (10.x.x.x) VLAN 20 - DHCP-DNS Managed I am going to add a node in MAAS.....I have setup the node (...
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2answers
56 views

How to force dhcp client to allow a self defined domain name

I'm configuring a 14.04 lts server without network manager installed. I set in /etc/dhcp/dhclient.conf: send host-name "os-vps276.projet-okinawa.org"; supersede domain-name "projet-okinawa.org"; I ...
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1answer
139 views

How to stop dhcp discover messages after dhcp release?

I configured a wrong interface as dhcp and did a ifdown and ifup on that interface. DHCP client keeps sending DHCP discover messages and I had to wait for a while for it stop. ctl+z or ctl+c didn't ...