DHCP is an auto configuration protocol used on IP networks.

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dhcp ipv6 dynamic prefix delegation

I'm trying to setup Linux-based home gateway with IPv6 support. IPv4 configuration is finished and I'm using IPv4 NAT, ISC DHCP for addresses allocation, PowerDNS for local DNS setup, PDNS recursor to ...
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209 views

To what extent does LXC manage configuring the network interface in a container?

In the LXC config file we can specify an IP address for a container: lxc.network.type=veth lxc.network.link=br0 lxc.network.ipv4 = 10.1.0.35/16 lxc.network.flags=up lxc.network.hwaddr= ...
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35 views

How do I run a systemd oneshot service whenever my system gets a new IPv6 address?

I would like to run a systemd oneshot service whenever my system gets a new IPv6 address assigned to it from the network router (this would be on boot, and periodically throughout its uptime). ...
3
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279 views

Configure a freeRadius server with dhcp function

I have installed a freeradius server on a debian machine and it is working correctly. I want to configure my freeradius server to provide IP addresses for the authenticated users! Can any one tell ...
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3k views

DHCP IP lease attempt failed over ethernet and dhcp with netctl

My dhcp ethernet works fine in Windows but not in Arch Linux with netctl and dhcpcd. What am I doing wrong? Output of "ip link" 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state ...
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73 views

configure port for dhcp request in uboot

We are fetching ip using DHCP in u-boot. we need to send via same interface (eg eth1) every time. but DHCP request sent via any configured interface(eth1/eth2..). How can we configure u-boot to send ...
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96 views

How is resolv.conf maintained when there are two network cards?

I have a Debian Wheezy VMware virtual machine guest with two network cards. One is in bridged mode and has access to the internet. The other is in host-only mode and does not. Some process, perhaps ...
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281 views

dhclient appears to give address but interface does not get assigned it

I am trying to connect to wifi using wpa_supplicant. I use this config: network={ ssid="guest" #psk="guest" psk=<numbers> } I also tried this config: update_config=1 network={ ...
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181 views

Use eth0 and eth1 for different subnets and assigned host name to interface?

I have a machine running SELES 10 with dual NIC Both the NICs are on separate subnets. The server uses a DHCP. So when one interface, eth0, gets the IP from DHCP and registers with DNS and then the ...
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384 views

Can't connect unsecured wifi from Wicd or terminal

I can connect without issue to WPA networks, but if I am somewhere like a hotel and try to connect to an unsecured WiFi, things hang at the DHCP part and I don't get an IP assigned. I'm running ...
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609 views

Booting over the LAN using uboot

I am trying to boot my beaglebone over the LAN. I am able to download the Kernel uImage from the TFTP server. Here is what I did - U-Boot SPL 2011.09-00053-gb423c52 (Aug 10 2012 - 11:26:55) Texas ...
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4k views

Debian Wheezy netinstall can't configure DHCP

I am reinstalling my Debian system with the Wheezy netinstall image on a USB drive. I have a wireless router that also comes with ethernet ports, so I could either connect to my LAN via wifi OR ...
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9 views

How do I troubleshoot DDNS forwarding problem?

Running BIND 9.10.3-P4-RedHat-9.10.3-12.P4.fc23 and DHCP Server 4.3.3-P1. DNS Zones report no errors and appear to work (dig, nslookup, nsupdate, dnssec, rpz, etc.). DHCP starts up without complaint, ...
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41 views

Allowing GRUB to access network in BIOS mode

I want grub to fetch some configuration via tftp/http. Using efi I can do insmod efinet and net_ls_cards will list my network cards which I can configure and use. Using PXE in BIOS/legacy mode ...
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38 views

Hostname won't resolve after setting up new server

I just completed a fresh install of Centos 7 on a PC. It is connected to the campus network, so I am not in control of the DNS server. I gave it a hostname by setting the HOSTNAME value in ...
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128 views

When no dhcp server answer, how can I force dhclient to use the static lease from dhclient.conf instead of a previous dhcp lease?

I have a piece of equipment I would like to default to a specific IP address when no dhcp servers are available. I have set the following static lease in /etc/dhcp/dhclient.conf: timeout 30; lease ...
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126 views

NFS over TCP not available from (My server ip) - network is unreachable & permission denied

I am trying to boot linux mint from a server I set up in virtualbox. Server is running in linux mint, and the client that I'm testing on (also virtualbox) is disk-less and booting over network. After ...
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32 views

ISC DHCP Server - Qemu system

I've been trying to get dhcp address by an ISC Server. I have one DHCP Server and one qemu server with multiple image tiny core. Hopefully this ascii drawing illustrates the topology: Over the qemu ...
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56 views

wlan0 inteface hosting DHCP is asking itself where it is

I set-up Raspeberry as WiFi router: eth0 on one side, and wlan0 on the other side. My wlan0 interface is hosting a DHCP server. But every minute, it asks itself where the DHCP server is. How could I ...
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232 views

isc-dhcp-server [ok] and running but doesnt seem to work at all

I am attempting to create my own Wireless Access point with compatible hardware and software. Running cmd service isc-dhcp-server start and service hostapd start on my Raspbian box returns Running ...
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35 views

Is the ordering of blocks within /etc/network/interfaces important? if so why?

I am using raspbian and have came accross a problem when using isc-dhcp-server . The problem seems to arrise when I change the ordering of the blocks within my etc/network/interfaces file For ...
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96 views

How to trigger dhcp4-change using nmcli?

I am working on a networking script which will do certain things, e.g., interface up/down/dhcp4-change events happen. I also need to generate these events through Network manager, not through ...
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108 views

How to get router info in “dhcp4-change” event in /etc/dhcp/dhclient.d/ script?

Am trying to add a script which will get executed on DHCP ip change for a particular interface. for that I have copied the below script at "/etc/dhcp/dhclient.d/dhcp-hook.sh". I need to get router ...
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224 views

Stop DHCP from flooding network with available IP-addresses

I'm currently setting up a dhcp within a network with multiple other DHCP-servers (school) and lately I've received some complaints that my DHCP in particular keep flooding the network and spamming ...
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317 views

Problems forcing Debian to obtain IP from predetermined server address using DHCP from nameserver on network

I am having trouble getting my Debian server to change the address where it requests its IP address. I currently have two routers. My primary distributes IP addresses to various machines on the ...
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2k views

isc-dhcp-relay service doesn't work

192.168.2.1(dhcp server) -> (eth1 192.168.2.3)[ubuntu 14.04 dhcp relay server](eth0 192.168.1.1) -> Client isc-dhcp-relay successful installed, configuration file is #/etc/default/isc-dhcp-relay ...
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101 views

Testing DHCP range; multiple addresses per interface

I set up a DHCP server; I have a range defined, for ~1k hosts. Is there a way to test all the addresses? This is the first time I have a task like this and I would like to know what will happen when ...
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107 views

ISC DHCP Server - A Client's Uplink Is Not Working

Running a DHCP server, client(s) does not have up-link (0Mbps) and has a downlink (50Mbps.) I am setting up a gateway/router on a PC running Debian Wheezy with ISC-DHCP. I have 1 WAN (eth0) and 2 LAN ...
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38 views

Why do I get “authentication” errors on this “Open” configuration?

I have the following ifcfg-wlan0 file: DEVICE=wlan0 BOOTPROTO=none ONBOOT=yes IPADDR=192.168.5.1 NETMASK=255.255.255.0 NETWORK=192.168.5.0 NAME=wlan0 USERCTL=no the following dhcpd.conf file: ...
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941 views

dhclient cannot get address from home router

I have a home router providing internet access to my desktop and laptop. Both computers are running Ubuntu GNU/Linux version 12.04, and have been configured to use DHCP upon installation. So the ...
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642 views

dhcp settings wifi radar linux mint

I am trying to connect to my wifi network. Using the standard connection manager in linux mint 13 xfce was not a good idea. No wifi networks are shown there. and when I left-click on it, the wireless ...
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1k views

Getting Samba 4.1's “internal DNS” to update hostnames from dhcpd

Samba 4 comes with its own "internal DNS" which can be used rather than BIND. Since Samba 4's main new feature is AD replacement, I would figure that its DNS would function similarly to Windows ...
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116 views

Arch Linux starting Wireless connection shuts down wired connection

When Im starting the wireless connection via SSH, as soon as th dhcp starts the connection(wired) to the computer stops working and the computer is only available on Wifi. Is that normal. Im using ...
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108 views

What should be the right dhcp configuration for generating a new network over eth0?

Even not under a real server like scenario, I'm testing with dhcpd for learning and practice purposes. I'm using Ubuntu 12.04 LTS. I want to offer a network by my eth0 interface. I receive ip and so ...
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1k views

dhcpd on interface with multiple address and link labels (aliases)

I had been running a dhcp server on an old version of isc dhcpd circa 2005, 3.0 something. I just upgraded to ISC dhcpd version isc-dhcpd-4.1-ESV-R6. Before upgrading, the interface (eth0) had two ...
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746 views

how to solve the problem of network DHCP when I install Debian?

I am trying to install Debian 6, but I have a problem every time I pass through the network part, it says cannot recognize the DHCP and couldnt connect to the network, so, I tried manually to ...
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372 views

How can I renew lease when it kept printing eth0 lease expired x seconds ago?

My guest VM cannot get an IP address from my host. It keeps printing: eth0: lease expired x seconds ago I've tried to start dhclient -r and dhclient and restart eth0 to no avail, see here for ...
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31 views

Connect to commercial VPN on OpenBSD 5.9

I recently installed OpenBSD 5.9 and I'm trying to get it functional enough to use as a replacement for Debian. One thing where I hit a brick wall is connecting to my VPN. I use a commercial VPN which ...
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21 views

No response to DHCP broadcast

Following on from this question, I'm still trying to get ethernet and DHCP working on a buildroot-based embedded Linux board. Here's what I'm trying: The ethernet interface is brought up using ...
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113 views

Can I stop IPv6 “Router Advertisement” filling syslog without disabling IPv6?

My syslog looks like this: Apr 1 19:05:25 raspberrypi dhcpcd[699]: eth0: Router Advertisement from fe80::c23e:fff:fe63:5170 Apr 1 19:07:35 raspberrypi dhcpcd[699]: eth0: Router Advertisement from ...
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24 views

Unable to configure ethernet interface using dhcpcd

I've got an embedded Linux system based on buildroot. I'm trying to get the unit connected to the internet using the ethernet interface, but without success. Here's what I'm trying: After booting up ...
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25 views

How to configure isc-dhcp-server to offer upstream DNS servers?

Every example dhcp.conf I can find has hard coded DNS servers - typically the google public DNS addresses... option domain-name-servers 8.8.8.8, 8.8.4.4; If I leave out the option ...
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pptp: possilbe to push routes to windows client?

I use pptp (PopTop) as default from Ubuntu 15.10, I try to push some routes to windows clients. Ad I 've read, it should be possible using a dhcp server instead of the internal address configrations. ...
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51 views

Configuring Dynamic DNS on CentOS 7 without dhcpd service

I have a CentOS server on which I configured DNS but it doesn't serve as a DHCP sever, since I have a d-link router which serves as such (DHCP is enabled on it). Is there a way I can configure Dynamic ...
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68 views

How to set kali linux IP Address Networking issue

I need your help regarding one small confusion. I have installed kali linux directly on desktop hard disk. i have also installed VirtualBox running vulnerable vm's inside kali linux OS with a network ...
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100 views

increasing lease-time on dhclient.conf in Debian

This is the default dhclient.conf in Debian testing and which is running on my system too - [$] cat dhclient.conf ...
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219 views

How to auto-renew IP from DHCP if IP is lost or changed?

I have a Synology DS1515+ fileserver running "BusyBox v1.16.1 (2015-10-28 13:23:20 CST) built-in shell (ash)", stripped down from commands. Machine is running Linux 3.10.35 #5644 SMP Tue Dec 1 ...
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dhclient equivalence of 'dhcpcd -NYRG' command

In dhcpcd, there are options -NYRG that prevent from replacing existing /etc/resolv.conf, /etc/yp.conf,/etc/ntp.conf files and from installing default routes. I would like to request if anyone knows ...
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reset of a ubiquiti networks power ap - no love

Had to reset our ubnt power ap. It's on fiber, and should pull ip via dhcp. no pppoe weirdness here. even so, it cannot grab an ip. all cables are connected. tried mtu 1500 and 1492. I have ssh access ...
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28 views

Virtual nics and dhcp testing

I need to conduct some testing and want to create 2 virtual network interfaces in Linux and bridge these to a physical nic. I need to test sending specific dhcp client parameters to a dhcp server on ...