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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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No internet access for client static ip on linux dhcp server

We are using a dhcp server configured with isc-dhcp-server on debian 8 in a small office network. The server has two network adapters one is connected to a pppoe modem and the other is connected to the local network. /etc/network/interface # WAN…
Laurentiu
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Assigning different IP from range on dnsmasq DHCP server

I have an installed dnsmasq DHCP server. I want to assign different IP address from defined range. For instance my IP range is 10.11.12.10 - 10.11.12.50 but I want to assign different IP (192.168.1.15) for specific MAC address. Is this possible? I…
Fırat KÜÇÜK
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DCHP Policies Server 2012R2

Tell me, please, is it possible to define a policy on the Windows Server 2012R2 DHCP which lease IP address to workstations based on the host name? For example, there are a host OFF-CONTOSO. I want all hosts, starting with OFF issued certain…
cortes_
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Will computers connected to a switch have a different ip?

I want to set up a network switch with several servers connected to it that must be port forwarded. Please refer to the below diagram for my setup: ___Computer 2 | Router-->Switch-| |__Computer 1 So…
Grammargeek
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When installing Windows Server 2012 R2 Essentials, should DHCP be turned off first on router?

Or should it be left on for setup, then DHCP on router turned off after setup so server does DHCP. Thank you.
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Auto DHCP IP Phones to a different subnet

I'm standing up a 3CX PBX system in my office and would like to set my DHCP to assign IP phones a 10.10.8.x address, while giving everything else a 10.10.0.x address (our current net). What would be the proper way to do this? Thanks
Joe JMC IT
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Cascade 2 routers with dhcp

I'm wanting to cascade 2 routers, one is a Linksys E3000 Router, the other is a wireless Cable Modem/Router made by Arris. As of now their cascaded via WAN to LAN, in other words, the internet port on the second router is plugged into an ethernet…
黒い雪
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Polycom phone not requesting DHCP offer

My Polycom IP550 phone is not requesting the DHCP address that my windows 2012 server offered it. I have done a wireshark capture on a mirrored port on our switch and you can see that the phone is doing the discover phase of the DHCP cycle and the…
Systems Party
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Under CentOS6.5, DNS Server build with DHCP, Client can't ping domain-name, but IP can

I'm trying to build a DHCP and DNS server. I check that client ip is ok to capture (11.11.0.1), ping server ip (11.11.0.9) is ok, but ping domain name (example.com) is not ok. On the server, ping IP is ok, ping domain name (example.com) is also…
結西卡
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Under Centos 6.5, restart dhcpd with dhcpd.conf failed: expecting IP address or hostname option domain-name-servers "11.11.0.9"

I'm trying to build a DHCP and DNS server. I check that client ip is ok to capture (11.11.0.1), ping server ip (11.11.0.9) is ok, but ping domain name (example.com) is not ok. On the server, ping IP is ok, ping domain name (example.com) is also…
結西卡
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Setup Windows Deployment Services when option 66 is already in use

I am currently trying to setup WDS at my company. The WDS and DHCP are running on two different servers. However, our IP telephony system is currently using option 66 (Boot Server Host Name) in order for the phones to boot/direct to the Telephony…
John Howard
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DHCP attribution without DHCP client

j'ai un serveur DHCP qui attribue des IP selon les adresses MAC des clients. J'ai un client qui n'a pas de client DHCP installé (pas que je sache). I have a DHCP server (on linux) which gives IP address depending of the MAD addresses of the clients…
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How to block DHCP traffic using iptables

First let me describe my environment: There is a VM (CentOS) acting as a gateway The gateway VM has to NICs, eth0 connects to public network, eth1 connects to private network eth0 get IP from public network's DHCP server The gateway contains a DHCP…
TieDad
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Ubuntu DHCP Server not assigning itself an address

I am setting up a virtual environment inside an ESXi server. I have a version of Ubuntu Server running isc dhcp. When the server boots up I issue the command ifdown eth0 followed by the ifup eth0. At this point the server issues a DHCP request, but…
Matthew
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Misunderstanding of DHCP/DNS - What is the IP of a machine before DHCPOFFER/DHCPREQUEST

From what little I understand, DHCP allows for dynamic assignment of IP addresses to client machines on a network from a DHCP server. The client transmits a DHCPDISCOVER packet, followed by a DHCPOFFER from the server back to the client, and that…
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