Dynamic Host Configuration Protocol (DHCP)

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Windows Deployment Services

I have a slightly advanced Windows Deployment Services setup. My router hands out DHCP addresses, including the following config. ip dhcp pool Servers_100 network 192.168.100.0 255.255.255.0 ...
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DHCP requests from wlan client not reaching server

I have a dhcp (and dns) server running on a centos/linux pc, which is the only dhcp server on my network. I have two wireless routers - a Netgear DG834G, and a Netgear DGND3700. The DGND3700 is also ...
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How do I set SBS 2008 as DHCP-server? I had the router as DHCP-server before

Until yesterday, we had no server at our network, so we used our router, D-Link DFL 200 as DHCP server. The router has IP: 192.168.1.1 and all clients has IP in the range: 192.168.1.10 - 192.168.1.20. ...
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Querying a DHCP server in C#

I have a really large network. Class A network and due to security reasons broadcast and any other PING has been blocked. I want to get all the PC IP that are alive. Is there any way to query DHCP ...
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dhcpd class match on hostname or mac address

We are running DHCPD 4.1.1-P1 on a RHEL 6 server. Currently we have 1 class defined for deny purposes. We now have a need for a class match to allow all devices that match a variable and deny ...
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How to discard a DHCP request's old IP address (and provide a new one)?

I switched from a 192.168.0.0/24 network to 10.10.10.0/24. The addresses are provided by dnsmasq-dhcp. The switch went fine for all devices but one - a printer (called PRINTER). This printer was ...
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291 views

Enable DHCPv6 in dnsmasq to distribute fixed range IPv6 addresses but failed

Help wanted! I want to create a AP in my Raspbian PI. And i choose dnsmasq as the dhcpv4 and dhcpv6 server. However, my laptop can acquire IPv4 successfully but fail to get a IPv6. Why the dnsmasq ...
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Multiple DHCP Servers maintain multiple LOGICAL subnets

I have one physical LAN, but I have several distinct groups and each should have their own subnet. What this means is each server should be able to recognize its own clients and ignore the rest. ...
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39 views

Extending IP-range

We have a problem with our IP-range. For the moment it is 10.0.0.1 to 10.0.0.254. Unfortunately it isn't enough anymore. So we wanted to setup a whole new scope on our DHCP server 2008. We want to ...
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is it possible to use cobbler using windows dhcp server or without dhcp?

I want to configure cobbler in my network but my network already managing by a windows 2k8r2 dhcp server. Is it any way to configure without dhcp server ?
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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 ...
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572 views

XenServer 6.2 DHCP Setup

I have a XenServer 6.2 running on a dedicated OVH Server. For this dedicated server I have 2 additional IP blocks. Whenever I setup a new VM (mostly CentOS 6.6) i have to skip the network ...
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3k views

configure a dhcp server to serve two different scope on the same subnet with multiple interfaces

Ok, so here I am with a pretty complicated problem on a Debian Wheezy server I have three interfaces : eth0, eth1 and wlan0 on a single server, eth0 will act as a gateway for eth1 and wlan0, I have a ...
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194 views

Duplicate MAC address, can be blocked?

Let's say we have DHCP server and provided MAC filtering system. Can we blocked the next spoofed MAC address? The next device will not be leased any IP address. Or normally it is already blocked by ...
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861 views

How to trigger DHCP request and inspect the reply from DHCP server

Is it possible to trigger a DHCP request from my DHCP server and then sniff and inspect the whole DHCP reply from the server to see what options/parameters it sends to the clients?
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is it possible to run bootp/pxe server using dnsmasq without act as dhcp server

on my network its already exist a router that do dhcp, boot in this network i need to boot a diskless system that use pxe to boot from network, while the pxe server is using dnsmasq to serve O/S, but ...
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457 views

DHCPD assigning wrong DNS server

I just installed two Ubuntu 14.04LTS servers. The first one I installed bind9 and isc-dhcp-server on. The second one was left as installed to use DHCP. I created a new private network using VMware ...
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Superscope DHCP leases and configuration set up

Hello I wanted to see if someone could help with a network problem I am having. Right now we have a super-scope and scopes of 192.168.50.1 and 192.168.51.1, as of now both are activated but only 192....
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245 views

Notification of low DHCP pool in split scope setup

In Windows Server 2008 R2, it is possible to read the Event Viewer for EventID 1020 which is an indication that the DHCP pool is running low on addresses. What if I have two DHCP servers in my domain ...
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561 views

2 DHCP Server it is possible to set a default server and a second

i have the following question (Problem) i have a AVM Fritzbox 7390 as WLAN Router and there is DHCP-service running with a range of 50 adresse. so far i works nice. Know i would like to have a PXE ...
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Linux dhcp server for wlan/wired

I want to configure my dhcp server on a debian router which uses different ip range based on the type of user connection; wlan or wired. The wlan is set in bridge mode! Since it is a public net I don'...
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Linux DHCP Server Migration

Background I'm moving 2 existing Linux DHCP servers to a new network. The servers currently configured as follows: shared-network network { #new network subnet 192.168.100.0 ...
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dhcpd not responding to request from MAC already in the lease

My dhcp server on linux machine has a specific host declaration for MAC within one subnet. When my other machine boot up over network using PXE, it receives the right IP address. However this dhcp ...
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DHCP Post-Install configuration wizard hangs

I'm attempting to set up a Windows 2012 Active Directory demo environment on a Hyper-V VM, but when I run the DHCP Post-Install configuration wizard to authorize the DHCP server in AD DS, the wizard ...
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VSphere 5.1 DHCP Server VM routing

I am trying to setup the routing for a VM that is my firewall/dhcp server. I have 3 VMs: router/firewall (centOS) -> VM1 unRAID(unraid) -> VM2 download-server(ubuntu server) -> VM3 2 NICs vmnic0 ...
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656 views

Running a dhcp server on windows 7 ultimate

I'm trying to get my HP T5740 thin clients to connect to my local network without much success. I asked a question here but haven't got any response. I think that question should have been posted on ...
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2k views

How could I fix “No subnet declaration for restart (0.0.0.0)”?

I have a DHCP service installed on my distribution, Backtrack 5 R2 (ubuntu 10.04) and it was working fine, but when I began to configure DNS it suddenly stoped working, how can I make it work again?? ...
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Ubuntu Server 12.04 ISC-DHCP-Server not working using standard configuration

I have been trying to configure the isc-dhcp-server package to assign ip addresses to devices connected to my eth1 adapter. Current Configuration interfaces: auto lo iface lo inet loopback auto ...
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1answer
5k views

Hyper-V virtual machine unable to get IP address from DHCP server running on same physical box

We have a Windows server 2008 R2 with two network cards running AD, DHCP, DNS and Hyper-V The first nic is setup with a static IP address and DHCP, WDS, and DNS are bound to it. The second nic is ...
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320 views

Setup dhcpd without gateway on purpose

I have an XP machine with two network interfaces. One is connected to my company's network (and the Internet). The other is a very local network which connects some hardware with my PC. Both the ...
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314 views

View DHCP Server Leases

How can I view the dhcpd.leases without having to SSH into the box and view using vi/nano etc. I used to have webadmin set up on another box but that was when I used the GUI to configure dhcp. Now I ...
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90 views

Problem with accessing a website hosted on a local device connected to the local wireless network

I am running Lighttpd 1.4.28 on an embedded device. Apart from the webserver, I run udhcpd and dnsmasq to allow other devices to connect to my embedded device to access the website. My device has the ...
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Can I just drop in a new DHCP server in place of my old one without breaking everything?

Right now, in my office, we have a Cradlepoint MBR1000 wireless router as our DHCP server. It's not as configurable as I'd like for it to be, and I need to set up a VPN, so I am considering replacing ...
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How to run multiple instances of dhcpd or add/remote listen interfaces at runtime?

The same network interfaces interfaces in my laptop (eth1, wifi0, br0) are often connected to different networks (home/work/university network, virtual network with Virtualbox, ad-hoc network with my ...
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dhcpd (isc-dhcp-server) not using part of address range

dhcpd (isc-dhcpd-4.3.4 under Debian) ignores part of specified address range. I have the subnet 10.24.32.0/22 assigned to interface: 10.24.32.0/22 dev net0 proto kernel scope link src 10.24.32.1 ...
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Which DHCP server can be tweaked for high packet loss environment (WiFi)? [closed]

After setting up an open Wi-Fi network (no authentication/encryption) for guest usage based on long range access points [UAP-AC-LR], I do see in the Unifi controller that quite some clients don't get ...
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DHCP leases file has 200+ instances of the same lease?

I'm not sure what's going on here. I have a CentOS 7 DHCP server, and the leases file is growing at a linear but steady rate - it's re-issuing the same lease to the same MAC over and over again, and ...
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Tomato router with separate DHCP server [migrated]

I currently have a Netgear R7000 (running Tomato) acting as my main router (DHCP and DNS) and access point. Because of how my house is laid out, the modem and router are apart from each other (...
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DHCP server assigning same IP address even if Computer is connected in different VLAN

DHCP Server OS - Windows Server Standard 2008 R2 DHCP Client OS - Windows 7, Linux based OS etc.. I have configured DHCP Server on Windows Server Standard 2008 R2 with SuperScope. Let assume that i ...
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Use Windows RSAT DHCP Server MMC SnapIn with Linux Samba 4 AD to manage dnsmasq/isc-dhcpd

This particular Active Directory installation uses a Samba 4 Domain Controller Forest running on up2date (05-2016) Debian Linux Jessie VMs. Remote Server Administration Tools (RSAT) are used from ...
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Few Concern: Migration domain controller 2008 R2 to 2012 R2 Domain

My Topic is Migration of 2008 R2 domain controller to 2012 R2 (All domain Controllers.) Current Set-up. I have 3 Domain Controller. DC2008r201: Running As PDC and DNS Installed. DC2008r201. ...
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Smaller subnet mask to “merge” VPN-connected LANs?

I have two LANs connected to different internet connections (in different cities, in fact): ISP1 -> LAN 1: 192.168.10.0/24 ISP2 -> LAN 2: 192.168.11.0/24 On each LAN is a router. Both routers ...
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Sonicwall firewall router dhcp server stops working intermittently

I just bought a Sonicwall SOHO which is the new model that replace TZ105, TZ 205 series. The network stops working intermittently. The whole network is down after every 30~70 minutes of uptime, no ...
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How to configure isc-dhcpd-server to update reverse zone without client pre configuration?

I'm trying to set up isc-dhcpd-server from ubuntu 16.04 (4.3.3-5ubuntu12) to configuring heterogeneous network with ubuntu, windows, macos, other ip devices. I'm already setuped bind to store ip ...
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Do DHCP server messages have to be sent from port 67?

I know DHCP servers receive messages (e.g. Discover, Request) at port 67. Can a DHCP server send responses (e.g. Offer, ACK) to port 68 from a port other than 67? I thought the client should not ...
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Wireless devices are detecting DHCP/DNS but Wired are not

I set up a server hosting AD, DNS, and DHCP. My wireless devices are successfully contacting the server and receiving an IP address, but my wired devices are not connecting. I have 2 virtual servers ...
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windows server 2008 R2 DC/ Dhcp server

windows server 2008 R2 DC/ Dhcp server. my workstations (windows 10 and windows 7) are having problems with connection. they are getting limited connection. the err they are getting on the work ...
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DHCP Server Dynamically Updating DNS on Other Server (Both Windows 2012 R2, No AD)

We have had a single Windows Server 2012 R2 server (with no Active Directory) running DNS and DHCP for our main network for a good few months with dynamic DNS updates from DHCP working fine. We have ...
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Unable to access VM after DHCPACK libvirt

The installation of a particular software makes my VM lose its connectivity. The point where it hangs is 2016-04-05 16:49:11.996 | Listening on LPF/o-hm0/fa:16:3e:b2:43:4c 2016-04-05 16:49:11....
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IPv6 Ping is unsuccessful when IP is obtained from DHCP server

I just faced this problem and it's driving me crazy. I have DHCP server for both IPv4 and IPv6. IPv4 works like a charm but the problem is IPv6. My client gets IPv6 (fc50::a9 to be exact) from DHCP ...