Microsoft Windows DHCP Team Blog

DHCP Server Callout API usage

teamdhcp — Mon, 06 Jul 2009 09:03:00 GMT

Microsoft DHCP Server Callout API provides a way for developers to access the critical phases of DHCP protocol processing in Windows Server 2003 family and later. This enables developers to: · Create customized extensions to the Microsoft DHCP Server...(read more)

Rogue DHCP Server detection

teamdhcp — Fri, 03 Jul 2009 09:58:00 GMT

Overview Rogue DHCP servers are those DHCP servers that are misconfigured or unauthorized unknowingly or those that are configured with a malicious intent for network attacks. Either be the case the impact on clients that are serviced by the rogue DHCP...(read more)

DHCP Server Performance in Windows Server 2008 R2

teamdhcp — Mon, 29 Jun 2009 13:45:00 GMT

This blog post details the performance improvement of DHCP Server in Windows Server 2008 R2 over prior releases. The results published are from a lab environment....(read more)

Option based IP Address assignment Callout Dll

teamdhcp — Fri, 12 Jun 2009 12:40:00 GMT

Overview DHCP administrators would like to manage address assignment in the network, by assigning IP address to DHCP clients based on vendor/user class identifier from distinct address ranges in the subnet. This functionality can be added to the Microsoft...(read more)

Windows 7 RC is available for TechNet and MSDN subscribers to download

teamdhcp — Fri, 01 May 2009 11:03:00 GMT

We are pleased to announce that the Windows 7 Release Candidate (RC) is available for immediate download to our TechNet and MSDN subscribers. If you’re not a TechNet Plus subscriber, please click here to learn about the benefits of becoming one. Windows...(read more)

DHCPv6 Information-Refresh Time Option

teamdhcp — Mon, 20 Apr 2009 11:06:00 GMT

DHCPv6 Stateless Clients obtain configuration data from DHCP Server, by sending Information-request messages. The configuration data typically has no associated lifetime, hence there is no information telling a host when to refresh its configuration information....(read more)

DHCPv6 User Class Option

teamdhcp — Mon, 20 Apr 2009 11:03:00 GMT

RFC3315 specifies User Class Option for IPv6 hosts. DHCP administrators may define specific user class identifiers to convey information about a client's software configuration or about its user's preferences. User classes are created to support the implementation...(read more)

DHCP Server Events Tool

teamdhcp — Fri, 20 Mar 2009 15:24:00 GMT

This tool can be used by DHCP Administrators to view all the events generated by DHCP Server directly in MMC. This tool can also be very handy in managing the MAC Based Filtering where you can see the list of people entering your network and you will...(read more)

DHCPv6 - Understanding of address configuration in automatic mode and installation of DHCPv6 Server

teamdhcp — Tue, 03 Mar 2009 12:58:00 GMT

Understanding of address configuration in automatic mode Windows Server 2008 and Windows Vista include a DHCPv6-capable DHCP client that will perform stateful address autoconfiguration with a DHCPv6 server. Windows Server 2008 includes a DHCPv6-capable...(read more)

How to monitor and audit DHCP Server configuration changes for compliance

teamdhcp — Tue, 03 Mar 2009 12:46:00 GMT

DHCP Server of Windows Server 2008 R2, supports DHCP activity logging, that is it allows DHCP Administrators to monitor the configuration changes of the DHCP Servers. Therefore the events pertaining to DHCP activity logging, will be logged with additional...(read more)

DHCP Server service security enhancement

teamdhcp — Tue, 03 Mar 2009 12:41:00 GMT

DHCP Server service is moved under Network Service account from what it used to be a Local System account untill Windows Server 2008. With this the DHCP Server service that runs in the context of the Network Service account presents the computer's credentials...(read more)

New features in DHCP for Windows Server 2008 R2 / Windows 7

teamdhcp — Wed, 25 Feb 2009 22:50:00 GMT

What are the major changes? The DHCP server in Windows Server 2008 R2 has invested in the areas of security, reliability, manageability and usability. Similarly on the DHCP Client in Windows 7 has invested on certain optimization for obtaining IP Address....(read more)

Migration of DHCP Server from Windows Server 2003 to Windows Server 2008

teamdhcp — Wed, 18 Feb 2009 14:34:00 GMT

Microsoft product support team often encounters migrated DHCP servers which are dysfunctional. The reason quite often for the bad state of the DHCP server is because backup/restore has been used by the customers for migrating the DHCP server across server...(read more)

MAC Filter Import Tool

teamdhcp — Mon, 16 Feb 2009 16:54:00 GMT

Hello Everybody, Thanks for all those who tried the MacFilterCallout dll . As you all must have checked out by now that Link Layer Filtering feature is a part of Windows Server 2008 R2 DHCP Server. DHCP Server team has come up with a GUI based tool which...(read more)

DHCP Broadcast flag handling in Windows 7

teamdhcp — Thu, 12 Feb 2009 19:44:00 GMT

1. DHCP Broadcast flag: DHCP messages have ‘flags’ field. The first bit in this field indicates whether the client is expecting a broadcast or unicast response from the DHCP server \ Relay agent. When the bit is set to 1, it indicates that the client...(read more)