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

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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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46 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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140 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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250 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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23 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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44 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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114 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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181 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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118 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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677 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:~# ...
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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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93 views

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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362 views

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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172 views

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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112 views

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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199 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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34 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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1answer
25 views

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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110 views

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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55 views

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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309 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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409 views

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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473 views

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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1answer
58 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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35 views

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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1answer
18 views

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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155 views

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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178 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 ...
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716 views

Can't start dhcp server

I'm trying to follow the tutorial How To Create An Evil Twin Access Point (with WPA/ WPA2 Capture). Everything worked except I get stuck at 20:51 at the command: dhcpd -cf /etc/dhcpd.conf -pf /var/...
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Ubuntu Server Not Booting After Changing DHCP Settings

I'm currently running an Ubuntu Server with 14.04LTS at home. I've recently had issues with the network and wanted to set the server to a static IP address internally. To do this I followed the guide ...
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Ubuntu ramdisk template

I've been working on a ramdisk template for running a complete root filesystem on the RAM of a baremetal server(over IPMI so no physical access) that boots over PXE. I used debootstrap to create an ...
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38 views

Change the DHCP range for LXC without changing physical interfaces

I am trying to change the DHCP range of my LXC containers. By default , ow addresses given by the dhcp are 10.0.3.X. how can I change this range so my containers can have IP in the range 10.0.2.X. PS: ...
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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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111 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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79 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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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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50 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
75 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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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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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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246 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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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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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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122 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 ...