0
votes
3answers
54 views

Split a Scope Linux<=>Windows

Is it possible to create a DHCP Failover Cluster between a Linux(Ubuntu) based server and a Windows Server 2012R2 based server. My idea was to include a new data into the dhcp.conf data to exclude a ...
0
votes
1answer
20 views

Windows Network Sharing - DHCP and Gateway pass through

I have several Windows 8 machines that are setup to do connection sharing over a wifi connection with switches behind a gigabit NIC. The devices behind the machines are Cisco phones and they are ...
0
votes
2answers
65 views

DHCP server - No IP for computers out of the domain

I would like to know if there is a way to deny leasing an IP address through my MS DHCP server to computers which are not registered in my domain. Thanks!
1
vote
0answers
20 views

Windows DHCP MAC-Range to Scope allocation

I wonder if there is any options to map a specific Range of MAC addresses to a specific DHCP address scope. The thing is, I want a specific scope for address allocation to bridged Virtual Machines ...
0
votes
0answers
169 views

Windows 7 Pro - DNS Servers changed on DHCP-enabled workstations over weekend, not sure how

This morning I came in to our SOHO office (>5 users) to reports of the internet not working. I tried all the usual simple fixes like cycling switches (each user has a switch at their desk) then I ...
2
votes
0answers
334 views

Windows DNS clients can't update PTR records, but can update A records (not ACLs)

I have clients configured via GPO with the following settings enabled: Dynamic Update Primary DNS Suffix Register DNS records with connection-specific DNS suffix Register PTR Records: Register I ...
1
vote
1answer
328 views

Windows 2012 DHCP Failover: Scope refuses failover config Error: 20044

I have a scope configured on a Windows 2012 DHCP server (primary in a hot standby config) with two Cisco Vendor class options. I've added the Vendor class options, identically, to the standby server. ...
4
votes
1answer
388 views

Incorrect lease times from Windows 2012 R2 DHCP

Env: Two Windows 2012 R2 DHCP servers in active/passive (hot standby) mode serving one scope. Scope lease duration: 1 day. MCLT: 1 hour. Situation: New dhcp client gets IP configuration with a ...
1
vote
0answers
31 views

Windows Dynamic DNS Update Sequence

I'm trying to get the Windows DDNS update sequence straight in my head. Here's what I think happens: Windows Client == DHCP Discover Windows DHCP Server == DHCP Offer Windows ...
3
votes
2answers
382 views

Can you use WMI to determine if a connection gets its DNS servers from DHCP?

The DNS server search order for a network interface can be read from Win32_NetworkAdapterConfiguration like this in Powershell, or programmatically using .Net ManagementObjects: > $NICs = ...
0
votes
0answers
164 views

dhcpd log being flooded with duplicate and uid leases

I am runnig centos 6.4, isc-dhcpd-4.1.1-P1. I have over 100 desktop laptops on win7. my dhcpd.log file is being flooded with following messages Mar 3 11:08:06 tanaga dhcpd: DHCPREQUEST for ...
0
votes
2answers
75 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 ...
0
votes
1answer
136 views

Cross over cable network with DHCP On in one machine [closed]

Network novice here. I need to setup a small network (cross over cable) between a windows server 2008 and Raspbery Pi. And I need to have DHCP service running in my windows server and it should assign ...
0
votes
1answer
218 views

send message to connected computer when IP obtain from DHCP Server

If a computer running Windows gets a IP address from DHCP Server, how could I send a message to that computer. Say DHCP Server running from Ubuntu Server. I am guessing through SMBClient? Or is this ...
3
votes
1answer
266 views

Windows 2008 R2 DHCP - client renewing too frequently

We are running a Windows 2008 R2 DHCP server. We just added a new DHCP server and removed the old one about three weeks ago. I have an employee who is reporting IP conflict errors every day now for ...
2
votes
1answer
3k views

What else does “netsh int ip reset” do?

According to this KB article when you run the "netsh int ip reset" command, all it does is to reset the content of two registry keys: SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\ ...
2
votes
1answer
31 views

Setting up DNS for Remote Access

I have Windows 2012 with the DNS/DHCP features installed. Do I need to install Active Directory and then add all my machines to the domain of local.FQDN.com for example? I can do this and still use ...
1
vote
3answers
260 views

Windows 2008 Domain - DHCP on Server vs Firewall

I currently administer a Windows 2008 domain network with DHCP running on the DC. Clients obtain addresses dynamically and servers are assigned static addresses. In the case that the DC fails ...
2
votes
2answers
1k views

Inconsistent dynamic DNS update behavior

After having upgraded a Windows Server 2003 Active Directory Domain to Server 2008, and upgraded client PCs from Windows XP to Windows 7, I'm seeing inconsistent dynamic DNS update behaviour. Two ...
0
votes
0answers
114 views

How does DNS update work in an environment where DHCP performs registration, and clients may have multiple DHCP leases?

Here are the particulars (all Windows): DNS - Our DNS only stores one A-Record per hostname. Scavenging is not currently enabled. DHCP - DHCP is configured (server level) to perform DNS registration ...
2
votes
1answer
672 views

Microsoft Windows DHCP: Steering IPv4 clients into specific scopes based on MAC

We have visitors on our campus who bring their own laptops and devices and use our wireless and wired networks. When we receive a copyright infringement notice (typically BitTorrenting), we are ...
1
vote
0answers
74 views

Checking Statement of Health (NAP) info on Linux using Dhcp and Radius

I have a Linux DHCP server and windows clients. I want my DHCP server to assign an IP address from a network let's say 10.6.3.0/255.255.255.128 if the client has it's firewall enabled or an IP address ...
2
votes
3answers
7k views

PXE boot fails to get IP address via DHCP, but DHCP works when OS booted

I'm trying to PXE-boot a Cisco UCS C240 server to install a new OS over the network, but it isn't picking up an IP address via DHCP during boot. I get the "No DHCP or proxyDHCP offers were received" ...
0
votes
1answer
34 views

Windows Server 2003 to provide DHCP to devices

I will use Windows Server 2003 to provide DHCP to devices like printers and other embedded device. Is it true that I need to buy a license ? Some one say to me that I need to buy call licenses for ...
11
votes
3answers
905 views

Use Windows DHCP/DHCPv6 server without setting a static address

You cannot set the Windows DHCP/DHCPv6 server to listen on dynamic addresses or all addresses, only static addresses. Is there a technical reason for this limitation? Is there any workaround? My ...
0
votes
0answers
805 views

Windows DHCP client and DNS suffix search list (option 119)

I'm trying to supply the dns search list to my windows clients to make the internal DNS naming scheme usable. Windows AD is not used so no GPO available. The ideal way would be to supply the dns ...
3
votes
1answer
1k views

Configuring VPN on Windows Server 2008 with no DHCP

Please see the revised section at the bottom as the original question seems to have been a little convoluted I have a cloud based virtual machine from my client's hosting company. The sole ...
0
votes
1answer
94 views

Changing DHCP Scope brought down the Internet connection

My school DHCP server(Win2008) runs out of IPs so I expanded the scope: original: 10.20.1.0 to 10.20.2.255 new: 10.20.1.0 to 10.20.3.255 But as soon as I finished it, all my workstations could not ...
5
votes
1answer
1k views

Can a laptop's hostname be associated with both of its interfaces?

I administer the network in my (very small, ~110 students) school. We have a Windows Server 2008 R2 Standard server, and we use Windows 7 Professional. We have ~10 workstations and 5 laptops, the ...
0
votes
3answers
152 views

Is DHCP required on a Win2003 secondary DNS server?

We have a secondary DNS server and we've been noticing that the DNS.exe process is getting rather large. (Like, rebooting the server large.) I read something somewhere that 2k3 has two relevant ...
-4
votes
2answers
123 views

How can I stop a DHCP server from assigning an IP to a particular user? [closed]

How can I stop a Windows 2003 DHCP server from assigning an IP to a particular user?
2
votes
1answer
213 views

Automatic subdomain wildcard for DHCP-DDNS additions (windows server)

We're running a Windows Server 2008 AD serving as DHCP and DNS for more than 300 PC. When a PC desktop with the name "harry" connects to the network, the DHCP server gives it a lease, and adds ...
1
vote
2answers
736 views

Setting Up DHCP Server as Failover

I have 2 Domain Controllers running at my company; DC1 has the following roles; ADDS DNS DHCP Scope - 192.168.2.100 - 192.168.2.240 DC2 has the following roles; ADDS - Replicated DNS - Secondary DNS ...
0
votes
2answers
173 views

Windows clients cannot access machine running DHCP server

I'm trying to setup a small LAN, using an Ethernet switch, an Arch Linux server, and around 10 Windows XP machines. This network has no outside connections. The Arch machine has a self configured ip ...
2
votes
1answer
224 views

How to correct time on Windows PDC server without affecting logons

I know how to set an authoritative time server in Server 2008 R2. That's not what this question is. I want to know how I can change the time on a network where the PDC (and therefore everything) is a ...
1
vote
3answers
2k views

Dynamic DNS Updates with Wireless and Wired interfaces

We have offices full of Windows & Mac users who obtain IP addresses from a Windows DHCP server, which in turn updates Dynamic DNS entries. We are noticing major inconsistencies with the ...
-5
votes
2answers
190 views

DHCP is a mess, where do I start?

We have a hell of a messy DHCP table. I'm on a mission to resolve this, but I was wandering the beltway to approach it without affecting the existing users. The following background information may ...
11
votes
4answers
914 views

What does a DHCP-client consider to be the “best” answer?

We have training rooms where normally Windows XP is installed (via PXE). The "normal" DNS/DHCP infrastructure are Windows-Servers. The training room has its own VLAN (different from the Windows ...
3
votes
1answer
614 views

IPv6 address preference and privacy extensions on Windows 7 and Ubuntu 12.04

I have a dual-stack network with a DHCPv6 server in a stateful mode (managed address configuration). Windows 7 and Ubuntu 12.04 hosts get the address configuration successfully, but still prefer the ...
4
votes
2answers
2k views

DNS servers assigned by DHCP reverting to old addresses, for entire site

We recently had to perform a disaster-recovery fail-over from our main site, which involved changing the IPs at which our main office Domain Controllers (which also serve DNS) reside. It went off ...
6
votes
2answers
945 views

Sending DHCP specific vendor options to a Windows server

My goal is send some information (url and a one-time token) to a windows machine. It's working fine for GNU/Linux servers because I get the information from /var/lib/dhcp/dhcp.lease or similar. This ...
0
votes
1answer
241 views

RedHat RHEL5.3 update DNS entry point of Windows 2003 domain on Debian style

I'm back today, because I can't do a trick that is simple to do on Debian. Indeed, I'm using a RHEL 5.3 server as a DHCP client on Windows Domain. To be able to correctly reach it form my windows ...
4
votes
3answers
323 views

Requesting >1 IP addresses via DHCP

I'm wondering whether it is possible to configure a Windows 7 machine to request more than 1 IP address? I'm doing some testing and it would be useful to have 2 local IP addresses however, the ...
4
votes
2answers
1k views

Disabling Netbios over TCP/IP via DHCP does not work

I'm working towards disabling Netbios over TCP/IP for my organization. I've created a reservation for my MAC address. I can see that the reservation becomes active when I renew my IP address. I set ...
1
vote
1answer
319 views

How to clean up IP's and prevent “ghost hosts” from claiming their IP address?

Background We have about 500 public IP addresses and is about to run dry. Most of the hosts are configured to get the IP from DHCP. But there some that was configured with static IP. The problem ...
4
votes
3answers
1k views

Changing from Infinite lease time to 8 days

On our DHCP server, the lease time is currently set to infinite. I want to switch it over to 8 days, but from what i understand the clients do not do a DHCP renew if they have infinite lease. Will ...
6
votes
6answers
8k views

Why can Windows machines resolve local names when Linux can't?

I have a small network with Windows and Linux machines connected to a D-Link DIR-825 router. The Windows machines on the network can reach all other machines by name while the Linux machines only can ...
3
votes
3answers
1k views

Allow DHCP clients to use public DNS server when domain server is down

I have a small network with a Win SBS 2k3 (SP1) domain... how do I set it up so that the workstations (they're all DHCP clients) can still resolve domain names if the domain server is down (without ...
4
votes
1answer
3k views

How can I change the MAC address of a network bridge in Windows?

I use DHCP reservation rather than static IP for convenience, and that relies on the MAC address of my computer. I recently bridged my main adapter with my VirtualBox adapter. When things stopped ...
1
vote
1answer
81 views

Define an exclusion for DHCP reservation

Lets suppose I define an IP address reservation in Windows Server 2003 DHCP Server. Is it mandatory to define an exclusion of this IP address also? IP Scope: 192.168.1.1 to 192.168.1.5 IP ...