Reverse Lookup

Go to Start -> Programs -> Administrative Tools -> DNS (click)

A window will open listing the DNS server in the left-hand pane. Click on the plus sign if the 'folders' named Cached Zones, Forward Lookup Zones, Reverse Lookup Zones do not appear in the left-hand pane.

Right-click on the Reverse Lokkup Zone 'folder' and select New Zone from the menu which will appear. A wizard will start. Click NEXT.

First option allows you to choose Active Directory-integrated, Standard primary or Standard secondary (with definitions). Click next after making choice.

The next window will ask you for a nework id. Only put the network id portion of your ip (eg 10.10.1.1 subnet mask 255.0.0.0 = net id 10, 10.10.1.1 subnet mask 255.255.0.0 = net id 10.10,
10.10.1.1 subnet mask 255.255.255.0 = net id 10.10.1).

From here on it should be plain sailing.

GO to DNS
Reverse Lookup
New Zone
Active Directory Integrated
Type in the network ID

e.g 10.12.1.19
Network number is 10

131.117.2.2
Network number is 131.117

Here is more info on DNS
http://computerperformance.co.uk/w2k3/W2K3_DNS_Pure.htm

Regards Guy Thomas