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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
110 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
567 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
878 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
340 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
395 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
279 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 ...
3
votes
3answers
878 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 ...
3
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
518 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
94 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
168 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
3k 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
226 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
455 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
372 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
67 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
13k 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
477 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
184 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
229 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
1k 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
3k 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 ...
0
votes
1answer
695 views

dhcp-server + iptables: Can't share ppp internet connection

I had this configuration before, and it used to work well, but now I got a new server and I can't setup it to share the internet connection from ppp0. I'm on Debian testing. The client connects ...
1
vote
1answer
236 views

Parsing the results returned via DHCPd's OMAPI interface

I'm experimenting with OMAPI as a means of giving our support staff additional insight into the state of a subscriber's service. Anyone who's ever played with OMAPI knows two things: The ...
2
votes
3answers
874 views

How to forward DHCP requests through router to Win 2k8R2 server?

I have a D-Link DGL-4500 and I've been using that for a long time as my DHCP server. I now have a Windows Server 2008 R2 machine plugged into it and I have set it up as a DHCP server. I don't have 2 ...
18
votes
4answers
12k views

How does a computer obtain an IP address via DHCP?

How does the computer know which device on the network to query? How does the default gateway factor into this? Pretty much, what is the chain of events that occurs when a computer tries to obtain an ...
0
votes
1answer
71 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 ...
0
votes
1answer
641 views

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 ...
2
votes
1answer
881 views

Microsoft DHCP Known and Unknown Clients

With ISC DHCPd under Linux, I can define separate pools for "known" and "unknown" clients, like this: subnet 10.0.0.0 netmask 255.255.255.0 { option routers 10.0.0.254; # Unknown clients get this ...
0
votes
2answers
391 views

Ubuntu server as DHCP Server and Internet Gateway

In my work environment there is one ubuntu server (dynamic ip) and 6 win7 systems all connected to a switch which is connected to a modem(isp internet). Right now the modem acts as dhcp server and ...
3
votes
4answers
724 views

Resolving IP Address Conflicts in LAN

We have our lan setup with DHCPD providing fixed IP addresses to the systems. However we are facing IP conflicts if some one connects a laptop and assigns an IP address belonging to another system. ...
0
votes
2answers
246 views

Questions on DHCP server setup

I'm fairly new to networking of this so I have a lot of questions... any help is appreciated. I'm setting up a DHCP server and I've run into a few problems... Here is my current setup: Router IP: ...
2
votes
3answers
3k views

Multiple PXE server same subnet

I've been struggling with this for some time. I have a few test machines that boot from the network, they receive the boot data from the DHCP server, this tells them who is the boot server where is ...
0
votes
1answer
1k views

How to configure vlans with server 2003 DHCP

How do you configure Server 2003 to handle vlans? I believe I need to use the IP Helper in DHCP, but am unsure and am unable to find a decent tutorial or guide on doing this. Can someone help me or ...
1
vote
0answers
530 views

dhcp-server with 2 subnet problem

How can I have 2 subnets (net1 and net2), one that alloweds all and the other only allowes selected hosts based on mac address? Here is my dhcpd.conf ddns-update-style none; log-facility local7; not ...
1
vote
1answer
941 views

DHCP not starting CentOS 5.6

I am having a lot of trouble getting my dhcpd service to start on CentOS 5.6. No matter what configuration I use it fails to start. So I started looking around in the server, I noticed I have no ...
1
vote
1answer
1k views

Can't find dhcp configuration file

I've installed dhcp server on my ubuntu natty (11.04) by typing this: sudo apt-get install dhcp3-server but, I can't locate the dhcp configuration file (dhcpd.conf) in /etc/dhcp3/ or in ...
0
votes
2answers
1k views

Why some DHCP clients are not showing DNS names?

I have a Linux server running ISC DHCPd and BIND DNS. Clients that receive their IP from DHCPd sometimes seem to update the DNS with their DNS info., but sometimes not. Any ideas why this might occur? ...
1
vote
1answer
519 views

Moving from ISC DHCPd to Windows Server 2008 R2 DHCP

I currently have a Linux server running ISC DHCPd and I'd like to eliminate this server and move to a Windows DHCP server. I'm wondering if there is an easy way to accomplish this or if someone could ...
2
votes
3answers
1k views

Monitoring an ISC DHCP Failover Status Using Nagios

I recently implemented ISC DHCP Failover and it's working beautifully, but I'd like to monitor the current status of the failover using Nagios. Ultimately, I would like my Nagios check to: report ...
1
vote
2answers
423 views

two DHCP servers on the same network - possible?

On my network, I have 3 remote sites and one local that all receive DHCP through our central dhcp server. all the sites have ASAs with dhcprelay and so on. I have two domain controllers - is it ...
1
vote
1answer
89 views

DHCP Server that will hand out tiny leases?

I am attempting to reproduce a condition in a lab and am hopeful to find a DHCP Server in which I can configure it to hand out tiny leases (20 seconds). So far, all I can find will not hand out leases ...
0
votes
2answers
125 views

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 ...