How to Set Alternate Access Mapping (AAM) On MOSS2007 Server

To Perform AAM on MOSS 2007 we can do it 3 steps after creating web site.
1. Central Administration:
a) open Centrl Administration In Moss2007 Server.
b) Go to Operations, Global Cofiguration and Click on Alternate Access mapping.
c) Then Click On Add internal URL, In Alternate Access mapping Collection Select the Web Application, Which We need to do Mapping and In Add Internal URL tab should like ex.(http://sample.test.com) and Zone Column Select Intranet.
Note: we have created Interanl URL http://sample.test.com. In this sample is the Alias(CNAME) name which we need to mention in DNS server.

2. DNS Server:
a) Open DNS Management console.
b) Expand Forward Lookup Zones.
c) Select appropriate Zone, Right click on that and select New Alias ( CNAME ).
d) New Resources Record type Alias name Sample, which we created in Internal URL. It will show FQDN.
e) Click browse and point the FQDN target host (Sharepoint server)

3. IIS on Web Server:
a) Open IIS Manager In the Webserver.
b) Expand Web Sites and right click and select Properties on the site which we done Mapping.
c) Then Click Advanced and Click Edit.
d) Then, In Ip Address column select the IP Address of the Server by default it will be (All Unassigned). TCP/Port Column Type the Port No. 80 Host header Value Column Type FQDN Created In DNS Server.
e) Then Click Ok and Reset the IIS once.