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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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Windows Server 2012 Failover DHCP

I've been tasked with migrating from our current 50/50 scope resilient DHCP servers to new hot standby failover DHCP in Server 2012 R2. Built a test bed with the two DHCP server VMs and created a failover relationship between them. Created a few…
ATtheincredibleaf
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DHCP: Create a scope within a scope

Before I joined the company I am currently working for, they set up a scope to encompass the 10.2.0.0/18 range of IP addresses (10.2.0.0-10.2.63.254). I was recently tasked with adding reservations to DHCP so that the entire 10.2.26.0/8…
MotoDave452
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ISC DHCP Server "Dynamic and static leases present"

i have a problem similar to Fixed and dynamic IPs in ISC DHPD lead to double lease In my DHCP-Log I often receive warnings like Jan 21 10:20:56 dc2 dhcpd: Dynamic and static leases present for 192.168.1.107. Jan 21 10:20:56 dc2 dhcpd: Remove host…
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How to ignore unused network interfaces in dhcpd on Centos 7

I have a machine running Centos 7 with 8 network interfaces. I have three of those interfaces configured and running. I have configured dhcpd to handle the local lan interfaces. I get the following warnings in syslog for the un-configured…
Michael Gantz
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Windows DHCP Reservation Outside of Lease Pool

I am very sorry if this has been answered already. I found this post: DHCP Reservation However I wasn't sure if that was related to Windows or Linux DHCP server and I wanted to clearly state my configuration for an accurate yes/no before I make any…
emmdee
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Windows Server DHCP import/export scopes using netsh.exe

We have Windows Server 2008R2 as domain controller with DHCP Server functionality. Task was to make reserve server on remote site in case of failure of main one. The reserve one will be running Windows Server 2012R2. The question was how to keep…
user2838376
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How can i locate rogue DHCP servers?

I am investigating some odd behaviour on a sub-net, where host registration doesn’t list some of the IPs that some users report having. Now that I’ve seen evince, i want to passively scan for the presence of a rouge DHCP server, not listed in my…
j0h
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Prefix Delegation and route creation

I'm using the ISC dhcp server version 4.1 for DHCPv6 prefix delegation on a network. When the server allocates a prefix to a client, the server does not create a route for that prefix to the client that requested the prefix. Here is a feature…
Jonathan Swinney
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Running pfSense server after load balancer, dhcp?

I got the following situation: Two wan, load balanced by a hardware load balancing router Wifi network (can be up to twenty AP's) And I need the following: Need a captive portal where clients can authorize and manage there accounts Authorisation…
Michel
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DHCP scope for a user class option

In Linux how can I set a DHCP server configuration which will lease IP addresses from scopes which are defined according to user classes. For example the following configuration leases IP addresses according to the first three octets of mac…
Alptugay
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DHCPREQUEST and DHCPACK spam in logs

I've recently noticed that my android phone (droid dna, although the thunderbolt that I had before did the same exact thing) is rapidly requesting dhcp info my dhcp server (isc-dhcp-server on debian squeeze). I had initially just thought it was the…
lacrosse1991
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Can not authorize DHCP server

I have run into a strange DHCP problem. The thing is the service is running, but the DHCP is not authorized. However, when I try to do it by right clicking, the option to authorize is not there - I can only choose to unathorize it. (Sorry, can't…
Sandokan
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Is there an official way to detect an existing DHCP server?

I'm planning a new feature on our product to support a LAN. Since the installation will be done by relatively non-technical people (it's for boats) I was thinking it would be useful to automatically detect whether we needed to provide a DHCP server…
parsley72
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Technically, could I use DHCP on a DHCP Server?

I know that it is not usual, but could I use dinamic IP address on a server that is running a DHCP Server instead of setting a static IP address on it? Is there a restriction of my Windows DHCP server?
Diogo
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Cofiguring DHCP server on ubuntu

I am trying to configure DHCP server on Ubuntu but facing some problems. Steps I have followed are given below: Step 1 # apt-get install dhcp3-server I faced following problem during installation. check syslog for diagnostics. [fail] Step 2 #vi…
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