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-1
votes
1answer
21 views

Cisco Router not displaying DHCP client hostnames

I've got a branch office configured to issue IP address from a Cisco Router (IOS 15.0). The router is successfully issuing DHCP addresses just fine. My questions is that when I issue the command "sh ...
0
votes
0answers
19 views

Empty declaration

Someone gave an answer about an unfunctional DHCP server. He said: "Create an empty declaration for your 10.4.1.0/24 network". subnet 10.4.1.0 netmask 255.255.255.0 { } What exactly is an EMPTY ...
0
votes
0answers
25 views

How the WLAN interface of a home router do to reply DHCP requests just at connection time? [migrated]

Using VirtualBox I created a VM with the following VirtualBox Network Settings: Attached to: Bridged Adapter Name: wlan0 ... .. . wlan0 is the wireless interface of my laptop, which is connected to ...
2
votes
1answer
51 views

set unlimited lease duration throuth CMD

On Windows Server 2008 (R2, 32-Bit, I found the following way to set the lease duration for, say, 3600 Seconds (1 Hour). netsh dhcp server scope 10.0.0.0 set optionvalue 51 DWORD 3600 [→ source] ...
0
votes
1answer
22 views

Ubuntu server dhcp reservation not working

I need some suggestion, if possible, about a dhcp server and ip address reservation. The system is a Ubuntu server 12.04 LTS. The DHCP is ISC DHCPd version 4.1. This is the /etc/dhcp/dhcpd.conf ...
0
votes
2answers
36 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 ...
1
vote
0answers
39 views

DHCP offer is unicast but DHCPACK is broadcast

My DHCP server broadcast DHCPACK 0xffffffff . it is not working on layer 3 dhcp relay agent . as it can not forward this broadcast message to my client. can any one help me from exactly the broadcast ...
3
votes
2answers
152 views

Assign fixed IP address via DHCP by DNS lookup

Preface I'm building a virtualization environment with Ubuntu 14.04 and LXC. I don't want to write my own template since the upgrade from 12.04 to 14.04 has shown that backwards compatibility is not ...
0
votes
2answers
96 views

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 ...
0
votes
2answers
35 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 ...
0
votes
3answers
174 views

Fixed dhcp host to automatically expire any lease

I have the following situation: Multiple offices with multiple firewall/dhcp servers. Every time the IT team of some office plugs a new network printer i need to create a fixed-address entry, and ...
2
votes
0answers
170 views

DHCP Server Not Offering to PXE Client

DHCP Server Not Offering to PXE Client BACKGROUND: I'm in the process of adding PXE services to an existing SCCM 2007 server. The SCCM server is separate from the DHCP server (Server 2008 x86) and ...
2
votes
0answers
84 views

Use Windows Server 2012 R2 IPAM Role to Manage a DHCP Cluster

My Google-fu is failing me today. I would like to blame the bad office coffee, the fact that it is a Monday, and the lack of information online...but maybe it is my fault. Either way, I hope that you ...
1
vote
2answers
113 views

Intermittently unable to connect to specific URLs

I have a simple and typical network configuration consisting of an ISP-provided cable modem connected through a SonicWALL router/firewall to a single switch that has been operating flawlessly for ...
1
vote
1answer
49 views

Is there a limit to the number of DHCP scopes I can have?

Some context: Currently all devices in our remote sites are setup on 1 VLAN. We have 400 remote sites. A project wants to split our sites into multiple VLAN's which on the whole seems like a good ...
2
votes
1answer
90 views

DHCP Warning Sign Icon On Windows Server

I have a Windows Server 2008 R2 SP1 Domain Controller. I have the roles AD, DHCP, and DNS installed on this server. I noticed today that there was a warning sign on my IPv4 setting, but not on my IPv6 ...
0
votes
2answers
68 views

Multiple DHCP servers [duplicate]

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 ...
-2
votes
1answer
41 views

domain-search value on my clients computer [closed]

I need help with configure my DNS and DHCP server - I have spent some time searching on google but have not got any informations regarding my problem. I have an Ubuntu 12.04 server running and use ...
3
votes
1answer
668 views

Move DHCP Scopes to existing DHCP Server

We have a remote Domain Controller that is running Server 03'. I'm wanting to retire this box and move to the 03' box that we have locally. I was looking at this guide, but wanted to ensure that it ...
0
votes
1answer
93 views

Can Windows Server 2003 DHCP Server assign multiple IP Addresses to a single host?

I have Windows 2003 Server handling DHCP for our network. We use reservations to assign some hosts IP addresses. Is it possible for the server to assign a single host two IP addresses in different ...
0
votes
1answer
38 views

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 ...
3
votes
0answers
81 views

ISC DHCPD memory leak solutions and or workarounds

Background: I have recently been put in charge of finding the root of and/or fixing a memory leak with an ISC DHCPD (4.2.5-P1) installation on a Debian (Lenny) Unix server. I have been researching ...
-1
votes
1answer
88 views

Enterprise DHCP server solution? [closed]

I have a network of about 1000 assorted devices, all of witch are running by static IP addressing. Given the size of the network and the lapse of technical advice, the addressing scheme is in chaos ...
-1
votes
1answer
92 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 ...
0
votes
0answers
10 views

ubuntu not restarting after uninstalling dhcp3 client

I have uninstalled dhcp3-client using the command aptitude remove dhcp3-client dhcp3 common And I restart the ubnutu. But the box is not coming up. It has become a big problem now as i have lots ...
0
votes
0answers
32 views

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 ...
0
votes
0answers
63 views

dhcpd set ddns-hostname from client supplied hostname

Basic issue: I'm trying to setup BIND and DHCPD. I have both working and the only problem is DHCPD cannot update BIND zones with names of dynamic clients (those without static leases). By trial and ...
1
vote
2answers
128 views

Static lease IP dhcp within dynamic range pool

I am using fedora 13. I want to statically bind a MAC to IP. Now the problem is if the IP is within the range pool, it may get allocated to some other host also. For that I use a tweak, where I ...
2
votes
2answers
165 views

Removing DHCP role, cleaning up AD data

Back story. So we had a development engineer (who just happened to have access to a domain admin account) who set up a handful of DHCP servers on our domain. This caused headaches, as the new DHCP ...
13
votes
4answers
1k views

Windows DHCP Server - get notification when a non-AD joined device gets an IP address

SCENARIO To simplify this down to it's easiest example: I have a Windows 2008 R2 standard DC with the DHCP server role. It hands out IPs via various IPv4 scopes, no problem there. WHAT I'D LIKE I ...
1
vote
0answers
255 views

dhcping “no answer” on CentOS 6.4

I installed a DHCP server (yum install dhcp) and this is my conf: # create new # specify domain name option domain-name "mydomain.name"; # specify DNS's hostname or IP address option ...
-3
votes
3answers
239 views

How to get machines to use a DNS without a fixed IP, which does not appear in the DHCP lease? [closed]

I have some machines on a network. This network has a DHCP server - which I have no control over, and no DNS server, i.e. the DHCP lease refer you to some ISP's server and do not serve IPs for local ...
0
votes
2answers
56 views

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 ...
1
vote
0answers
44 views

Multiple DNS mappings for a host via DDNS

I have a network in which DNS is automatically updated with a record for hosts when they get an address via DHCP (isc-dhcp-server & Bind configured with DDNS updates). The DHCP server is ...
-1
votes
1answer
80 views

Create separate Network for testing purpose [closed]

I have installed Windows Server 2012 on a VM (ESXi) for testing/learning purpose and I also like to install DHCP Server as well but this will conflict with my ISP router and I don't want to disable ...
1
vote
1answer
67 views

DHCP server not assigning IPs - Linux (CentOS)

I am having a main issue with the DHCP server. It is not assigning IPs and the dhcp.leases file is increasing in size as it is logging multiple entries for same IP. Started and stopped the service ...
0
votes
0answers
153 views

i am not able to pass dhcp requests across vlan

I am running dhcp on server 2012 and an astaro UTM firewall. I have a catalyst 3560 with vlan 20, 30 and 40. vlan 20 being the native vlan. When using astaro firewall for dhcp with scopes for each ...
0
votes
1answer
22 views

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 ...
0
votes
3answers
150 views

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 ...
1
vote
1answer
122 views

DHCP Server Issuing NAK when servicing multiple subnets

We currently have 3 VLANs setup in our network. On our DHCP server (Windows 2008) we have 3 scopes created for the 3 separate subnets. Our clients can't seem to pull addresses on the subnets, except ...
1
vote
1answer
114 views

Server 2003 DHCP Server with Low-Access user account

I'm trying to run the DHCP Server service under a low-permissions account (partly to reduce attack-vectors, and partly just for kicks), as it runs under LOCAL SYSTEM by default. I've successfully ...
2
votes
2answers
99 views

DHCP/static IP nomenclature

I've just inherited systems administration for a small network, on which we have exclusive access to the first 128 IPs on a private virtual subnet. We have a DHCP server which binds IP addresses to ...
1
vote
1answer
108 views

HyperV Migration and DHCP Reservation

In my company network we've 2 HyperV-2012 host with DAS, every server has a DHCP reservation in the DHCP server (windows server 2008). Yesterday we've migrated (using shared with nothing migration) ...
2
votes
1answer
180 views

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 ...
1
vote
2answers
177 views

IP Address shortage/Subnetting

Facing a problem where we are running out of available network addreses, we are currently on bog standard 192.168.1.x range. Reading about making more ips available and subnets and think i have just ...
1
vote
4answers
1k views

Computer gets IP from DHCP server but has no internet connection

I've installed an isc-dhcp-server on Ubuntu 12.10 and I'm trying to setup a DHCP server on a head node for six worker computers in the local network. The head node itself is a DHCP client receiving ...
0
votes
1answer
30 views

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 ...
1
vote
2answers
305 views

Need to prevent SBS 2003 disabling its DHCP server if it sees another DHCP server on network

The DHCP server on our SBS 2003 server shuts itself down automatically after a couple of hours of having a Hamachi gateway running on the same LAN. The server incorrectly assumes that Hamachi ...
0
votes
0answers
110 views

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 ...
4
votes
1answer
222 views

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 ...