Jul 012008
 


Windows DHCP can register host records (A) and Reverse lookup or Pointer (PTR) resource records automatically whenever you add a new device to the network. This enables simplified and easy network administration. However, these records are not automatically purged when they are stale or outdated (say when the host gets a new IP address) and they remain in the DNS zone database indefinitely. This can cause network issues and can prevent host names from re-used.

However, this can be overcome by configuging the DNS Server to track the age of each dynamically-assigned record and to periodically remove records (also called scavenging) that are older than the number of days that you specify.

The age of a resource record is based on when it was created or when it was last updated. By default, Windows client systems by default send a request every 24 hours to the DNS server to update their records. This prevents the records the records from being removed from the database.

Continue reading »

Incoming search terms:

Apr 032008
 


Windows 2000 & Windows 2003 DNS Server Dynamic DNS update functionality enables DNS client computers to register and to dynamically update their resource records with a DNS server whenever changes occur. This reduces the requirement for manual administration of zone records, especially for clients that frequently move and use Dynamic Host Configuration Protocol (DHCP) to obtain an IP address.

Continue reading »

Incoming search terms:

Mar 102008
 

By default Windows runs an online Defragmentation of the Windows Active Directory database every 12 hours. However, Online defragmentation doesn’t recover the disk space or compact the database. It simply moves data around.

An Offline Defragmentation, on the other hand performs a defragmentation on the database, compacts it and recovers the space. Use the “ntdsutil” utility to run Offline Degramentation on Windows Active Directory. This requires unmounting the Active Directory which mean rebooting the server in “Directory Service Restore mode”.

Continue reading »

Incoming search terms:

Feb 282008
 


Group Policies are used to apply system and security policies for the client PCs in a Windows Active Directory based Domains. While Group Policies is vast in itself to explain, here is a simple procedure on how to enable/disable a service or a Device driver using Group Policies.

The registry keys that the Group Policy targets to disable the service or the drivers is here

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services]

Continue reading »

Incoming search terms:

Jan 242008
 

For an administrator to admin a server which is Active Directoty domain controller like install/unistall software or stop/restart services, as on any other member server, the admin should be a Domain Administrator. However, this can be worked around.

The following procedure will allow you to make a standard Administrator and admin on the domain controller server wherein he can perform day to day administrations without any permissions to alter Active Directory like adding or deleting users.

Continue reading »

Incoming search terms: