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Questions tagged [dhcp-server]

Dynamic Host Configuration Protocol (DHCP)

The DHCP service is a client/server application that allows "clients" to obtain configuration information (typically for network settings) from a "server".

Questions carrying this tag should focus on the server-side more than the client-side.

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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 DHCP server? Thanks in advance.
kwO7
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Backup and Restore DHCP

Today our Windows Server 2003 server is running DHCP to serve all clients with IP addresses. We have installed a new Windows Server 2012 R2. Now i want to move the DHCP from the 2003 server to the new 2012 R2 server. Can i just backup the DHCP and…
anpe
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CentOS: DHCP Server and DHCP relay on same machine

eth0 IP: 192.168.1.100 Alias interface eth0:dhcp IP: 10.10.1.100 dhcpd.conf: authoritative; local-address 10.10.1.100; subnet 10.10.1.0 netmask 255.255.255.0 { range 10.10.1.10 10.10.1.50; option routers 10.10.1.1; option…
HTF
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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?
tox
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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 192.168.50.1 is handing our leases, 192.168.51 wont.…
Vdub
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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 that use an 80/20 split scope to take a /24 pool…
JJBladester
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Multiple DHCP servers

In what circumstances should you configure multiple DHCP servers on the same subnet? My understanding of using more than one DHCP server is that your clients will use the nearest DHCP which could be unpredictable. However I have read a suggestion of…
Simon Foster
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DHCPD: permanently leased IP being offered (twice) to random node and assignee

Greeting. On a small LAN (< 20 networked devices) with a cento6 5.9 server/dhcp-3.0.5-33.el5_9). I am configuring permanent leases thusly (dhcpd.conf, partial): range 10.115.64.60 10.115.64.250; host vega.nouvelle.it {hardware ethernet…
Alien Life Form
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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 server in my network. On the Fritzbox i can't do the…
syswombat
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DHCP Randomly Not Assigning Addresses

Having a strange issue for the past day or so. Some users (probably about a dozen, dozen and a half out of 100 or so) are having trouble pulling DHCP. They are getting the private IP address. If I disable/enable the network adapter and do a Repair…
hiiambo
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Wireless Clients unable to connect to internet

Our small office network consists of 2 windows 2008 servers, and 14 workstations (8 running windows 7 and 6 running windows xp) and 1 router(wired/wireless). The main server has DHCP, DNS, Active directory configured. Server 2 acts as a backup…
Ambassador
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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't know client MAC address in advance. Any chance…
Rk2013
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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 netmask 255.255.255.0 { option subnet-mask…
hokeycokey
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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 reply contain other "options" that i want to utilize…
Usman
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Is it possible to prevent DHCP service on SBS 2003 from shutting down due to rogue DHCP server?

We are using LogMeIn Hamachi to link two remote sites together by VPN. This is working perfectly, the only problem is that the DHCP service on our SBS 2003 server shuts itself down after an hour or so of Hamachi being enabled, as it identifies the…
Austin ''Danger'' Powers
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