DHCP is an auto configuration protocol used on IP networks.

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ArchLinux - DHCPCD timed out during dual boot installation from USB

I am trying to install a Dual Boot ArchLinux with Windows 7 running already on my machine. I have succesfully "burned" ISO on my USB using Rufus. After botting up, I manage to access Live ...
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Can't get DHCP on ovs port automatically

On centos7, I have disabled network manager in order to use OVS. however, I wish to get my IP address through DHCP on my port br-ex; if I edit /etc/sysconfig/network-scripts/ifcfg-br-ex to include ...
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34 views

Problems setting up Ubuntu Machine as a router

I have been at this for over 24 hours, here is what I have so far. -I have an Ubuntu Server running version 14.04.2.amd64, called SV-01 -SV-01 has two NICs. ETH1 is for the external network (goes to ...
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2answers
48 views

Disable DHCP without altering 'interfaces'

I have a bunch of RPis running in read-only filesystems that are not able to modify the /etc/network/interfaces file. As of right now, they load their configurations off of a USB stick and use ...
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1answer
36 views

Arch Linux: Despite ot static ip configuration I get a DHCP address

This is very strange to me. On my Raspberry Pi running the latest Arch Linux I disabled all the DHCP service on ETH0 and everything else DHCP: rm /etc/dhcpcd.duid pacman -R dhclient pacman -R dhcpcd ...
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13 views

dhclient equivalence of 'dhcpcd -T' command

In dhcpcd, there is an option -T which is declared that:"Test case, when dhcpcd goes through the DHCP negotiation sequence but doesn't actually configure the interface." I would like to do the same ...
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9 views

List of available networks disappears after 15 seconds Lubuntu 14.04

When I boot lubuntu 14.04, running on my Dell 11 chromebook, if I click on the network manager applet in the panel it lists the 8 or so networks in range. After roughly 15 seconds, all the networks ...
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18 views

How to trigger dhcp4-change using nmcli?

Am working on a networking script which will do certain things interface up/down/dhcp4-change events happen. And I need to generate these event through Network manager, not through dhclient. So how ...
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19 views

in freebsd add DHCP IP as an alias on top of statically configured IP to the same interface on console (not by config files)?

I need to find a way to configure an alias by DHCP but not touch statically configured IP of the same interface and have to do it all by console, not by editing some conf files. As far as know you ...
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1answer
54 views

Access Point offers itself IP if used as DHCP Server?

I'm trying to use an raspberrypi (OS=raspbian 4.0.7) I had flying around so I researched a little bit and everything seems to work more or less fine. I am using hostapd in combination with an wifi ...
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35 views

Trying to install a cluster, DHCP failing to start

Trying to install a linux cluster using this tutorial. I am running CentOS 6.3. When I try to start DHCP with service dhcpd start, it fails. I've used tail -f /var/log/messages and dhcpd -t, but I ...
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20 views

dhcp3-server and strange DNS/NTP servers

I have problem with dhcp3-server 3.1.1-6+lenny4. My dhcp-server sends "strange" IPs for DNS and NTP servers in DHCP ACK despite configuration which doesn't have those IPs. In ACK packet we can see the ...
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11 views

OracleSolaris 11.2 and DHCP configuration failure

I want to have IP address assigned by DHCP, so I set: % netadm enable -p ncp Automatic It seems that after this the dhcp agent has been initiated, and throwing errors: ip: WARNING: net0 has ...
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1answer
31 views

centos firewall seems block dhcpv6 reply message

It's very strange that my CentOS cannot receive dhcpv6 reply message from dhcpv6 server. I have enabled the rule dhcpv6-client. Every time I try to bring up the interface, dhcpv6 request messages are ...
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25 views

Access point doesn't give IP adress after DHCP request

I'm trying to achieve this : http://askubuntu.com/questions/318973/how-do-i-create-a-wifi-hotspot-sharing-wireless-internet-connection-single-adap Almost everything works fine, but my dhcp server ...
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1answer
82 views

DHCP and read-only root filesystem

When doing ifup wlan0 on a system with / mounted as read-only (embedded computer), I get this error: Failed to connect to non-global ctrl_ifname: wlan0 error: Read-only file system Internet Systems ...
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25 views

How to broadcast two access points?

How do I broadcast two access points with two WiFi cards with hostapd? Most tutorials don't work since udhcpd doesn't work with two access points. Example tutorial: ...
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20 views

Restarting dhcpd.conf failing

I am trying to setup a Kickstart server and when I am trying to restart the dhcpd server after having updated dhcpd.conf it is throwing a "failed" error. I am installing the Kickstart server on a ...
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1answer
27 views

DHCP server does not appear on nmap, no errors

I have tried to get into Ubuntu thing recently (newest edition), but I've got a problem with DHCP server. I configured the files /etc/network/interfaces and /etc/dhcp/dhcpd.conf according to my ...
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26 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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114 views

Configuring Network using dhcpcd

I have installed the new raspberrypi-net-mods using dhcpcd on my Pi running the latest Raspbian. This works, but I am trying to understand why and how. I have read the dhcpcd and interfaces man pages ...
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24 views

dhcpd restart command asks for password from command line but not from a script?

I have a script that runs and will ssh into another server to restart its dhcpd. In the script, the command literally is: sudo ssh -n $SERVER /sbin/service dhcpd restart This works fine when the ...
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1answer
61 views

Static IP changes to dynamic automatically after time

I have found only one discussion about my problem here, but not a solution. I have access to one Debian 7.8.0 amd64 virtual machine (under VMware) and its IP address is gained through DHCP, e.g., ...
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113 views

Virtual Box Bridged network failed to get IP (DHCP) No DHCPOFFERS received

My goal is to get Bridged network working. When I try to UP interface in my Virtual Box VM, it tries some DHCPDISCOVER messages, but eventually I get No DHCPOFFERS received. I found where is the ...
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54 views

Problems Setting Up DHCP Server On CentOS 6

I have been trying to set up a DHCP server on CentOS 6 running on an Intel NUC i7. I have installed dhcpd and am using the example dhcpd.conf subnet 192.168.1.0 netmask 255.255.255.0 { option ...
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200 views

TFTP times out in CentOS 7

I have an isolated server that telnets into the single device on its network and loads a file to it using the telnet command load. I am trying to recreate the functionality on another PC. The old ...
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66 views

How to block the response of certain DHCP server

There are multiple DHCP servers that run on our LAN, and some of them are unwanted. Can I configure my OS to reject certain responses so that I can get the correct one?
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65 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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28 views

dhclient allows for address conflicts

I invoke from my application dhclient but there is a problem with IP addresses conflicts. If I have other interface with statically set IP address, dhclient does not send DHCPDECLINE when DHCP Server ...
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17 views

dnsbind not working from client end

I am trying to configure dnsmasq in a virtual environment. I have created 2 VMs in VMWare Work Station. Was successful in installing and configuring DNS Server and able to do nslookup of client and ...
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31 views

Multiple DHCP Offers - Which is selected? [closed]

I have created a testing scenario in VMWare for a man in the middle attack using DHCP spoofing. It's for a college project. Windows 8 machine bridged to host adapter Kali linux bridged to host ...
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Does dnsmasq automatically update when running as a dhcp server as well?

I want to set up dnsmasq on a Raspberry Pi to use as a DNS server for my home network. My goal is to have a setup where when a new device is connected to the home network, it can be addressed by its ...
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130 views

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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How to get IPs via DHCP, through a router from another DHCP server?

ISP -> OpenBSD box -> Wireless router We have an OpenBSD machine that connects directly to the internet, has dhcp/dns cache "server" on it, and forwards the connection to clients via ethernet ...
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35 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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414 views

Cannot get IP address from WiFi access point (hostapd) with DHCP (dnsmasq) bridged with two ethernet adapters (bridge-utils)

My Android phone is trying to get DHCP address through WiFi connection, but fails. Obviously, I might have messed up something in my settings because I couldn't find a complete guide which would let ...
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48 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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178 views

ifconfig not showing ip address under eth0

Usually when I connect my raspberry pi to my laptop using an ethernet cable, the ifconfig command in each computer would show the ipaddress of each computer under eth0. I recently got a new raspberry ...
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18 views

Turning off dhcp name resolution in dnsmasq

I configured dnsmasq to forward queries to 168.192.in-addr.arpa to another server, but if I send an request for an address to dnsmasq, and there is a device configured via dhcp with a name then ...
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2answers
641 views

Append DNS suffixes to /etc/resolv.conf

Is it possible, and how do I configure CentOS 6.6 so that /etc/resolv.conf will obtain its configuration via DHCP, but will also have additional domain names added to the search line? Bonus points if ...
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19 views

DHCP server easy switch

i have a server, running Centos, that bring reserved DHCP for mac to 5 computers, but they have diferentes ip depending on some external parameters, and i change manually everytime, and i want know ...
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442 views

what is “rfc3442-classless-static-routes” in /etc/dhcp/dhclient.conf

I am trying to debug DHCP on my laptop (I am using dhcping and dhcdump to see what the DHCP server sends back). Following is my /etc/dhcp/dhclient.conf. option rfc3442-classless-static-routes code ...
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119 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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175 views

How to use “on commit” with isc-dhcp-server (IPV6)

I try to use the "on commit" trigger in isc-dhcp-server. I made prefix delegation, and I have problem with updadting routing table, so i want to use the isc dhcp triggers to manually update routing ...
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100 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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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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245 views

How to set and get DNS and DHCP servers addresses

On my openSUSE 13.2, I have a case to set and get DNS and server addresses. I managed to get the DNS address by parsing /etc/resolv.conf, my concern now is setting DNS and DHCP. Does changing the ...
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616 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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61 views

DHCP occasionally assigning IP address with hostapd

I am currently getting my internet from a building of mine two blocks from where I live. I usually use a wireless card to connect to the access point that has the internet..What I am trying to do is ...
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116 views

How to fix or bypass the DHCP handshake to get an IP address

My linux box can't seem to get a DHCPOFFER from my router. This is blocking me from getting internet access on the linux box. Here's the setup: I have two computers, a linux box called mocha and a ...