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

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Try DHCP first, if it fails assign static address and use the machine as a DHCP server itself

As the title says, I have a tiny screenless Ubuntu server that I move around, that has two different behaviors and needs to adapt automatically, that is, without any human intervention, at bootstrap: ...
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67 views

Ubuntu 14.04 as router Destination Network unreachable

I am fightning with this for like 10 days now i really need to ask you guys, i hope someone has 5 mins time to explain me what i am doing wrong! For the start i wanted to configurate a router for my ...
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isc-dhcp-server: dhcp dynamically update dns records

i'm trying to dynamically update DNS records when DHCP give out addresses. but even though I have specified allow-update with a key in /etc/bind/named.conf.local and specified the same key in ...
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25 views

Reset DHCP IPs to beginning of range

Kind of a silly question, but I'm just curious as to how you'd reset the DHCP range of your server back to the beginning of it's designation. I've tried restarting the DHCP service, but to no avail. ...
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Dnsmasq and Iptables for routing

I'm using a Raspberry Pi with two ethernet ports as a router. The network looks like this. "Internet" <--(…)--> Fritz!Box <--(172.16.x.y)--> [eth1, dhcp] Raspberry Pi [eth0, static] ...
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+50

beyond MAC address spoofing

Saturday, I am going to have to attempt to connect my notebook to a network that does not like me much. It is a school network. I work there as a volunteer, but don't have a sysadmin to explain what ...
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28 views

Hostapd with localhost server

I have hostapd and isc-dhcp-server working on my linux 14.04 box. My WiFi devices can find the hotspot and are assigned an ipaddress. At this point there is no connection through to eth0. I also have ...
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I'm using DHCP.I Cannot ping to local network. but can ping to public Ip

I'm Using Ubuntu 14.04LTS. I'm using DHCP. I can access internet. Also I can ping to any public IP address. But the problem is I cannot ping with any other system in my network. All other systems are ...
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17 views

Set up A- and PTR-records automatically

is there a way to make the DNS or DHCP server to set up the A-record and PTR-record for each IP in a subnet? instead of adding one by one? thanks
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The dhcpd.leases file

At home I run my own Ubuntu 14.04 DHCP/DNS server. This is working well and I really like Linux as my DHCP server since normally I work with Windows DHCP servers. I really don't have much experience ...
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21 views

Yardi on Ubuntu, Patric, digitalbeachbum

I am trying to run an old DOS real estate management program Yardi 4.0 on ubuntu. Has anybody done it successfully? I had read a post here from a user 'digitalbeachbum', Patric, earlier last year ...
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How to setup Multi Dhcp Server

I'd configure isc-dhcp-server and its works fine but now we are running out of range as we are exceed 255+ active devices. Current configuration: eth0: 192.168.0.1 I want to setup following things. ...
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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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56 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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91 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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39 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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38 views

How to find a printer on another subnet

I have a server with 4 ethernet ports: 1 used to connect to internet and 3 others used to manage 3 local subnets. I configured the DHCP server, the routing, packet forwarding for IPv4 and NAT; ...
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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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21 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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85 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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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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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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40 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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27 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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71 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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63 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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32 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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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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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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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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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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328 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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105 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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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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22 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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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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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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803 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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491 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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83 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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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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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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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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152 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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124 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 ...