Dynamic Host Configuration Protocol (DHCP)

learn more… | top users | synonyms

1
vote
0answers
302 views

ISC-DHCPD failover, Modifying host definitions via OMAPI

Background: I'm working on replacing my single DHCP server with 2 in a failover configuration. When I do a DHCP request I see the lease is created in both dhcpd.leases files on each server. However, I ...
4
votes
5answers
1k views

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 ...
1
vote
1answer
4k views

OS X bootpd as dhcp server not giving out ip addresses

I'm experimenting with PXE lan-boot on my Mac OS 10.6; After some prolonged trouble shooting, I've gotten to the point where LaunchD is nicely running bootpd with the following options: <?xml ...
0
votes
1answer
95 views

DHCPv6 Server IP address

I am new to DHCPv6. In dhcpv4 we have Option 54 to retrieve the Server Identifier (ie. Server IP address) in DHCP message. Similarly how to retrieve DHCPv6 Server IPv6 address in DHCPv6 Message. I ...
0
votes
1answer
204 views

ipcop + active directory

im planning to install IPCop linux in my company. My problem is that the current router/dhcp/server is also running active directory. What configuration should I use to keep the old active directory ...
1
vote
1answer
431 views

dhcpd: varying vendor-class-identifier

I'm having trouble selectively sending parameters in response to a DHCP Inform packet using groups (or even without, just using host declarations) for bootp stuff. My configuration file right now ...
0
votes
2answers
1k views

Setting up DHCP server behind two routers

I have a network configured in the following fashion: |-> Imaging server (192.168.1.42) |-> 192.168.1.100-150 range Internet->Router A-+-> Router ...
1
vote
1answer
2k views

What is the ip-forwarding option in dhcpd.conf?

From O'Reilly's book "TCP/IP Network Administration": option ip-forwarding 0 | 1; Specifies if the client should do IP forwarding. 0 disables IP forwarding, and 1 enables it. The only IP ...
2
votes
2answers
349 views

Multiple DHCP servers available to virtual networks in VMware - how to set priority?

In a VMware ESXi 4.1 lab environment*, I have a pair of virtual networks configured (10.0.4.x and 10.0.10.x). On both networks is a DHCP server. The problem is that the networks are routable to each ...
1
vote
1answer
182 views

2 NICs Windows 2k8 Server DHCP

Hi I have 2 NICs on my Windows 2008 R2 Server and I want to be able to have 1 NIC connected to the router (Wan) and 1 connected to a standalone switch (Lan) and act as an DHCP server. I want it to act ...
0
votes
1answer
629 views

Error - reading DHCP configuration file. No such file or directory. Solaris 10

I'm currently working on a Sparc Sun-Fire-280R running Solaris 10 8/10. The machine has dhcp-server preconfigured to use NIS from the onset but I don't have any knowledge of where those config files ...
3
votes
2answers
122 views

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 ...
1
vote
1answer
367 views

Guest Internet access for an hotel

First of all, thanks so much for all the help from all the techies on this site. We have to implement the ability for guests to use the internet over wireless for an hotel. When guests check into ...
4
votes
3answers
2k views

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 ...
1
vote
1answer
479 views

Some clients aren't updating using dhcpd's “ddns-update-style interim” with Windows dns servers

I am using dhcpd 3.0.5 and Windows 2008 R2 for dns. I have "ddns-update-style interim;" set and the Windows server is set to allow unauthenticated updates. Most of the time this works great, but ...
2
votes
1answer
547 views

IPV6 Bind/DNS DHCP

We are run the one event in that there 7000 people are visiting, with Laptop to provide then internet access. We thought of setting up IPV6 DNS/DHCP all this people will be use LAN cable to get ...
1
vote
4answers
721 views

DHCP scope size to number of DHCP hosts ratio

Is a DCHP scope range of x.x.x.100 to x.x.x.200 large enough for 65 dynamic hosts? I manage a small windows domain which has grown some. We now have 65 hosts using a DHCP scope range of 100 ip ...
-1
votes
2answers
2k views

Using Windows Server 2008 R2 and PfSense [closed]

Hey I want to setup my personal home network so that R2 is dishing out DHCP and currently my PfSense box is doing this for me. my setup is motorola surfboard to PfSense to switch. How do I configure ...
4
votes
2answers
1k views

Using DHCP with Multi-Homed NICs

I am trying to steer away from our current manual addressing system and embrace the decades-old wonder of DHCP. In our domain and even at my home network DHCP is great - I can use address reservations ...
4
votes
5answers
1k views

Host DHCP services on server or firewall/router?

I've been debating with myself about the best place for hosting a LAN's DHCP services. I have the option of either on a sonicwall firewall or a Windows 2008 server. The two things I was looking for ...
3
votes
1answer
1k views

Getting same IP address for cloned Virtual Images

I was trying to install 3 VM and instead of creating them individually (by using the New VM) I actually cloned them. Now after I start the VM (they are running in the bridge mode) all the VM's are ...
3
votes
2answers
1k views

Setup DHCP split scope but second server won't give leases

My work setup had only one Windows 2003 DHCP Server which resides on DC01. I wanted to improve the redundancy for DHCP so I installed DHCP services on another server (DC02) which is also a DC and DNS ...
1
vote
1answer
115 views

DHCP wont give an IP to the Second NIC, Routing Questions

I have 3 NICS, one being a Wired network which connects to a wireless router, which is the primary network secured by WPA. Another being a Wireless USB Card I'm trying to setup to connect older ...
0
votes
2answers
700 views

Active Directory and VPN on single server setup

I've attempted this several times now and never got it exactly correct. I am looking to setup my ML5 server as a VPN Server, Domain server, DHCP Server and file server. However every time i have ...
0
votes
1answer
1k views

Ubuntu server dhcp - duplicate leases

So we have an ubuntu server running DHCP & DNS managed through webmin (because it's less effort ) Nothing is BROKEN, but I noticed duplicate leases showing. Anyone know why and how I can prevent ...
2
votes
1answer
530 views

What's the difference between REBOUND and RENEW state on DHCP Client?

According to various DHCP description after reaching 50% client will enter RENEW state and will start sending DHCPREQUEST messages to the server in order to renew the lease. It will continue to send ...
0
votes
1answer
425 views

Combine static and dynamic setup in dhcpd.conf

I'm trying to migrate from a situation with static ip addresses and a dhcp server on a router to one new dhcp server. My idea was to add the current static ip addresses as static ip addresses in the ...
1
vote
3answers
300 views

ISC-DHCPD: why does it cease to work when the internet is down?

For as long as I've been using a DHCP server on Linux or even FreeBSD (all come from ISC if I recall correctly), it seems that it just doesn't know what to do with DHCP requests when the Internet goes ...
4
votes
3answers
990 views

Ranges for Multiple DHCP Server: Better to overlap or separate? wireless vs ethernet clients?

I know there are mixed feelings about running multiple DHCP servers on one LAN, but I'm wondering about the best way to set their ranges. In my case, I have a router which performs DHCP and also my ...
4
votes
3answers
2k views

Stop DHCP client from receiving old IP address on new VLAN

I have one DHCP server running Windows Server 2008 R2. It is configured with one Superscope which contains 5 member scopes. One scope for each one of my subnets. Here is the problem, if I am on VLAN ...
-4
votes
1answer
107 views

DHCP IPV6 Environment [duplicate]

Possible Duplicate: DHCP IPV6 Environment in DHCPV4 for discover, request we mention the source ip as 0.0.0.0,what it could be the in DHCPv6.Similarly we mention the multicast address as ...
3
votes
4answers
621 views

Can ONE dhcp server serve 2+ network ip range

I have only One dhcp server which has only one interface with ip address 10.0.0.1/24. The dhcpd.conf are like: subnet 10.0.0.0 netmask 255.255.255.0 { <-------working host yyy { ...
1
vote
1answer
2k views

ISC-DHCP-SERVER - Can different reservations get different options (router, DNS, etc)?

Suppose there's just one Ubuntu / ISC-DHCP (v3) server on the network. I've successfully been able to provide "DHCP reservations" meaning MAC foo gets ip 1.2.3.4, whereas everyone else just gets an ...
0
votes
1answer
3k 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 ...
0
votes
1answer
96 views

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 ...
2
votes
1answer
176 views

DHCP IPV6 Environment

May I know what are the changes needed in the DHCP message formats if I want to convert into ipv6 environment? Now I am using ipv4 dhcp client and ipv4 dhcp server. But I want to implement this using ...
3
votes
1answer
4k views

Can a DHCP reservation use an IP address in the exclusion range?

Windows Server 2008 R2, running the DHCP service. DHCP Scope: 192.168.1.1 - 192.168.1.254 Exclusions: 192.168.1.1 - 192.168.1.99 If a reservation uses an IP address in the exclusion range (like ...
0
votes
2answers
1k views

Install a dhcp/tftp server on debian

I'm trying to configure a dhcp server on my Debian computer in order to run a tftp server. I have 1 nic which is eth0. I followed several tutorials but none of them worked with me. I installed ...
0
votes
1answer
255 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 ...
1
vote
3answers
2k views

How to configure TFTPD32 to ignore non PXE DHCP requests?

I want to give our Windows guy a way of easily PXE booting machines for deployment by plugging his laptop into one of our site networks. I've set up a TFTPD32 configuration which does just that, and ...
0
votes
1answer
474 views

How do I setup Ubuntu interfaces so one interface is “mapped” to another?

I have recently setup a DHCP-Server on an Ubuntu 10.04 server machine. The machine has two interfaces (eth0, eth1). I have the DHCP server setup correctly because computers connecting to the network ...
1
vote
2answers
460 views

Why is DNS updating every hour on the hour?

I have a Server with a statically set IP address of 10.200.0.30 It has a Dynamic DNS entry matching its computer name to its IP Every hour on the hour it changes its DNS entry to a random IP address ...
0
votes
1answer
70 views

Setting Windows Server 2003 DHCP

I have a Windows server 2003 with two NIC one is setup to connect to the network with static IP/internet, and the other one is supposed to be used internally as DHCP server. However I am having ...
4
votes
2answers
15k views

Linux DHCP server option 43 vendor-encapsulated-options, how to format/encode?

I admin the network for a small business which has an IPCop firewall box providing DHCP services to the network (and various other services). The DHCP server in IPCop appears to be dhcpd and IPCop ...
0
votes
1answer
507 views

Is it possible to make ISC dhcpd (IPv6) 4.2.2 unicast-only?

I ask because the server is handling DHCPv6 for two VLANs and I can see some requests both via DHCPv6-relay from our ProCurve switch and via the ff02::0:2 anycast address and responds to both ...
0
votes
1answer
239 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 ...
1
vote
2answers
236 views

DHCP configuration problem

EDIT: We have following setup: User comes to building, he gets address from range for unknown clients (192.168.100.0/25) and can only get to our web site. We call it anonymous range. Let's say our ...
1
vote
2answers
2k views

Two DHCP server in the same subnet

So I change jobs recently and in this new workplace I've found that we've actually got two DHCP servers. In the very same subnet, and they both have the same scope. I did not set up this but I see ...
1
vote
4answers
3k views

problem dhcp3-server ubuntu server 11.04

I installed dhcp3-server in ubuntu server 11.04 apt-get install dhcp3-server However, an error message during installation: Traitement des actions différées (« triggers ») pour « man-db »... ...
-1
votes
3answers
4k views

Windows 2008 R2 DHCP for two scope on two interfaces

I'm setting up a brand new DHCP Server over Windows 2008 R2 Standard edition server, and I'm planning to serv two differents lan with this one. Here is my configuration: 1 AD/DNS/DHCP Server with ...