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

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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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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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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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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 'floats'...
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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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44 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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52 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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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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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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234 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 about....
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46 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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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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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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50 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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171 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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2k views

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

The responsible thing that is assigning dynamic IPs for you is called DHCP server so you have to enable it to resolve this issue. Try the following: Open VirtualBox's Preferences and under Network ...
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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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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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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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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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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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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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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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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:~# ...
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How do I configure DHCP client to use the “routers” option as well as the “rfc3442-classless-static-routes” option?

The DHCP server on my network sends the following options: option routers n.n.n.n; option rfc3442-classless-static-routes ...; But the DHCP server is (incorrectly?) configured to send the actual ...
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High packet loss on Ubuntu 12.04.5 with working router

I am unable to connect to the internet on my Ubuntu 12.04 box using DHCP with a reserved IP address. There are a few facts that make this particularly mysterious: The router formerly seemed to ...
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pfsense dhcp with wpad/pac

i configured the dhcp on pfsense with wpad/pac and privoxy (socks5). In Firefox i entered the automatic proxy configuration url like its in pfsense and everything works fine (all traffic over the ...
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Can I configure dhclient to execute a bash script after a successful DHCP renewal?

I'm still new to Ubuntu, and just installed Ubuntu-server 14.04.3 LTS. I've signed up for dynamic dns and opted to use a bash script by updating my ip address on the dynamic dns website's exposed ...
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Ubuntu server 15.04 losing static IP configuration and gets DHCP address instead

I have a new installed Ubuntu server 15.04. I configured it with a static IP settings as: The loopback network interface auto lo iface lo inet loopback The primary network interface auto eth0 iface ...
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248 views

How should I configure DNSMASQ for an IPv6 environment?

Id like to deliver IPv6 addresses (thats easy) and resolve DNS requests for Internet and local IPv6 clients (that's difficult), but I'm missing a comprehensive guide how to do this with DNSMASQ. There ...
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35 views

How to automatically start dhclient

My internet connection does not work until I manually run 'dhcp' as super user. I have been unable to find clear instructions for running it automatically every time my computer boots up.
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Connect Ubuntu 14 server to the Internet

I just installed Ubuntu 14 server in my VMware workstation 11. What should I do to get an Internet connection? Because I need to install the package isc-dhcp-server.
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How to make sure the server uses the gateway from eth0 at multiple DHCP network setup

I run a Ubuntu server in VirtualBox with 3 network interfaces. How can I make sure the default gateway is always the on from eth0. eth0 -> NAT, DHCP eth1 -> bridged, DHCP eth2 -> host only ...
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MaaS LAN cable wiring topology for DHCP

I installed the MaaS controller, DHCP and related packages at the master node. I can see the web UI as well. Now I need to add slave nodes. But I have vague knowledge about DHCP, so I don't know how ...
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332 views

Problems with wpa_supplicant and hostapd. Help!

I'm tryng to share my wireless network (wlan0), and I follow this tutorial: https://linuxalfi.wordpress.com/2011/11/08/connectify-for-linux-with-single-wireless-interface/ The problem is: If hostapd ...
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Do you really need to remove DHCP clients for static IP to stick?

The instruction from this link works to change from DHCP dynamic IP to static. But there's a step where it says: You need to also remove the dhcp client for this to stick (thanks to Peter for ...
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Can I run a Ubuntu and Windows DHCP / DNS Server together in the same network?

I am just wondering if I can run both windows and Ubuntu DHCP/DNS Server in the same LAN. The Present configuration is Windows 2003 Server AD and Ubuntu DHCP n DNS Server with BINDS. I have proposed ...
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ISC DHCP: Unsupported device

I am trying to run ISC DHCP on my wlan1mon device which is in monitor mode. But i get error: systemctl status isc-dhcp-server.service ● isc-dhcp-server.service - LSB: DHCP server Loaded: loaded (/etc/...
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35 views

Networking issues with strange setup

I'm having the hardest time getting web access to a server. I have a machine running Linux Mint(host) and another running a Ubuntu server(client). My host machine has internet access from a DHCP ...
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64 views

Wi-Fi access point not supplying IP addresses to clients

I created a wireless AP with hostapd with configuration saved in a file called hostapd-test.conf. When I run the file with sudo hostapd ~/hostapd-test.conf I can see the AP by scanning for Wi-Fi ...
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Web server & ICMP question

Im am very new here in askubuntu.com and pretty new to ubuntu server system. at our church we have a ubuntu control server which is in charge of internal network(DHCP) and all that related. the ...
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Static IP in a VirtualBox VM that's “mobile”

I've seen the great answers on configuring a static IP in Ubuntu. My challenge is that I've got a VM running on my laptop for use in doing demos where the router and gateway addresses change ...
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How to show the reserved leases that dhcp has on file?

I want to check on the reserved leases (called "fixed-address" in the config files) of my dhcpd. To get all the info about the free dynamic ips is no problem, but the reserved one that get written to ...
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DHCP error is reported, but DHCP works fine with all other machines on network

I am trying to install Ubuntu for the first time, and wish to use the network install option. I downloaded mini.iso and made a bootable USB drive with it. This booted correctly, but when I try to ...
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Export / save DHCP.CONF and Interfaces files as text

I would like to save/export the DHCP.conf and Interfaces content to a text file. Is this possible? and if yes, how should I do it? I need to do this as I've configured 2 DHCP-servers (failover mode) ...
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201 views

Virtualbox static IP to windows VM on ubuntu host

I am trying to setup a windows VM on Ubuntu host using Virtual box. Since I would be running a SQL server database on the windows VM I am trying to setup a static IP on that VM. In order to do that I ...