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2
votes
0answers
11 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
94 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
27 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
44 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
58 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
37 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
113 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
68 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
26 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
62 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
78 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
66 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
28 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
46 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
65 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
112 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
787 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
166 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
234 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
47 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
36 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
74 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
61 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
88 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
126 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
84 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
102 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
81 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
86 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
145 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
165 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
369 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
28 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
234 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
99 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 ...
0
votes
0answers
41 views

dhcrelay does not forward router offers

I have two subnets subA 10.1.1.0/24 subB 192.168.2.0/24 a router & DHCP server at 192.168.2.1 I have a computer acting as a router at 10.1.1.1 and 192.168.2.4 connecting subA to subB I run ...
4
votes
1answer
163 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 ...
1
vote
1answer
117 views

Command Equivalent to Reseating a Network Cable

I'm remotely accessing a network where I'm testing two separate dhcp servers where: 1) Both dhcp servers are on the same subnet. 2) The dhcp servers do not have overlapping ip pools. 3) Each dhcp ...
1
vote
0answers
81 views

Cannot assign IP address according to an option parameter

I have this DHCP conf file: authoritative; option domain-name "XXX.XXX.XX"; allow bootp; ddns-update-style ad-hoc; class "karpuz-kabugu" { match if (substring (option user-class, 0, 6) = ...
-1
votes
1answer
70 views

Access Control Lists & DHCP

Please take a look at this image right here. In the image above you can see a virtual netwerk simulation program (CISCO Packet Tracer 6.0) where I'm trying to setup a network and secure it. However ...
4
votes
1answer
201 views

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 ...
0
votes
0answers
97 views

Windows DHCP server not sending all options

I'm facing a strange problem with Windows Server 2003 and its DHCP server. Here is my scope and its related options. However when I look at the traffic using Wireshark, here is what the server is ...
0
votes
1answer
59 views

DHCP server as Linux and client as Windows

I have ubuntu installed machine and setup a DHCP server on it. Now I want to use this DHCP server as all for my windows clients. I tried a lot but failed. Right now Windows client machine uses ...
0
votes
1answer
76 views

Forwarding all HTTP/HTTPS traffic to a port with iptables

I'm trying to setup a wireless network that routes all traffic to a local webserver (basically a hotel wifi login page). Here's my dhcpd config: $ cat /etc/dhcpd.conf ddns-update-style none; ...
2
votes
2answers
145 views

windows server 2008 DHCP ran out of IP addresses

I have a Windows 2008 server with 1 DHCP Scope 10.0.0.X/255.255.255.0 and watchguard firebox for my internet router. I have run out of IP addresses. I added a second scope to my DHCP server, and I ...
2
votes
4answers
431 views

Is a short DHCP lease from my ISP likely to cause problems?

I'm wondering if having a short DHCP lease is likely to cause any issues, such as: Dropped VoIP calls Dropped VPN connections If so, could you explain why?
0
votes
1answer
454 views

DHCP Post-Install configuration wizard hangs

I'm attempting to set up a Windows 2012 Active Directory demo environment on a Hyper-V VM, but when I run the DHCP Post-Install configuration wizard to authorize the DHCP server in AD DS, the wizard ...
0
votes
1answer
2k views

Setting up routing in CentOS 6.4 as a router/DHCP server with two nics

I am stumped about how to setup centOS 6.4 to route packets. |Local Network| -eth0- |CentOS 6.4 box| -eth1- |Internet| The centOS box has a dhcp server running. Currently it is handing out IP ...