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Questions tagged [dhcp]

DHCP stands for Dynamic Host Configuration Protocol and is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol.

The Dynamic Host Configuration Protocol (DHCP) is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol. DHCP allows for computers to be configured automatically to communicate with each other over an IP network without the need for manual setup by a network administrator.

The implementation of DHCP relies on a DHCP server to hand out network configuration information to DHCP-capable clients that request an IP address (and other information required or useful in communicating with other devices on an IP network). In addition to an IP address, common configuration information served over DHCP includes a default gateway, subnet mask and DNS sever(s), though there are many more possible configurations that can be sent out using the DHCP protocol.

More in-depth detail on DHCP and its implementation can be found at Wikipedia.

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Can Linux DHCP clients be configured to accept only certain addresses?

I manage an estate of RHEL workstations all of which use DHCP with static reservations. On occasion—during a desk move, for example—a workstation might be connected to a port on the wrong VLAN and acquire an address on the wrong subnet. This…
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all computers change ip except windows server

I recently started working as a web developer in a small business based in cyprus. Here's the thing, they want me to fix their messed up network which has a dsl(for internet) connected on a rack switch panel(48 ports), half of the ports are…
Kypros Vassiliou
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Can a DHCP server with a static IP assign itself an IP?

I am currently trying to configure a DHCP server for a small network A. Currently the DHCP for this network is handled by a local DHCP server, with the idea that this new DHCP server will take over the DHCP for this remote network A. This other…
Stringers
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How to assign IP to physical machines?

Excuse my ignorance, I want to know if its possible to setup untangle in ESXI such that it will be able to assign IPs to physical machines outside the ESXI box. Here is my setup: 1) Management Network -> vswitch0 -> vmnic1 2) UntangleVM(vnet0) ->…
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Host specific ipv6 address range for address rotating in pfsense dhcpv6

I have taken upon myself the configuration of an ipv6 network in an enterprise lan. There is a single VLAN for all the hosts in the LAN. I am using pfsense 2.3.4 software. I now have to figure out the address distribution in the LAN. The addresses…
Girtsd
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Redirect all traffic to local webserver

I have a website in my localhost: index.html I want to convert my laptop into a hotspot in a way that any url that the client will open in his browser will be considered as my local webserver mentioned above. For that, I used airbase. #put…
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Foreman smart-proxy Microsoft DHCP unknown error 5

I have a Foreman smart client version 1.15.0 running on Windows Server 2016, which I am trying to use for managing Windows DHCP servers with Foreman. When I try to populate the DHCP leases with the smart client, I get the error: Error: ERF12-2600…
Mark Henderson
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Can PXE Boot in UEFI but not in Legacy

looking for some advice on why my lab setups is acting this way regarding PXE boot. A breakdown of the unit is: Host OS is Server 2016 running hyper V with 2 VMS Hyper V VM1 is the DC, running AD, DHCP , DNS VM2 WDS When I PXE boot a Client…
WengWeng
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Is it possible to configure a DHCP server can fall back to be DHCP client when connected to another network?

Is it possible that a system running a DHCP server can become a DHCP client if connected to a network which already has a DHCP server running? We have a situation where we want to run isc-dhcp-server on an Ubuntu box, there will be several IP…
Richard Rigby
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How to put 127.0.0.1 ABOVE in /etc/resolv.conf with ubuntu + networkmanager + DHCP

Actually, on a ubuntu 16.04 server, my /etc/resolv.conf is : # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 213.186.33.99 search…
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Windows Server As Router // Internal and External

apologies if I've posted this to the wrong forum topic, hopefully a mod can move it over if so :) I've been having a issue for a while now, and i know this isn't best practise, and its not intended for use, its just something i want to work on for…
JJ Sutton
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Unnamed devices in server 2012 dhcpv6

I have a server 2012 R2 box running DHCP for IP v4 and v6. In reviewing the leases for the IP6, there are a set that do not have names. These have a DUID type of 04 as shown in this picture: IPv6 leases with no names I can't seem to figure out what…
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Multiple subnets with dnsmasq

I've done some research on dnsmasq and its ability to DHCP several subnets, but it sadly only seems to work when there are multiple interfaces as shown in the configuration…
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Ghost MACs roaming my network

I'm using a router with dnsmasq providing dhcp services. From some time my laptop is not getting assigned IP. The router complains: May 13 08:16:01 dnsmasq-dhcp[432]: DHCPREQUEST(br0) 192.168.1.234 86:16:f9:4b:65:27 May 13 08:16:01…
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Could DHCP server offer multiple address for a client and let it choose one?

Possible Duplicate: Does DHCP protocol allow a server to offer multiple addresses to clients instead of just one? If the answer is yes, then why does it does that? The following is the original question: dhcp client sends to server dhcp discover…
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