SharePoint is a browser-based collaboration tool that makes it easier for people to work together. It helps people set up Web sites to share information with others, manage documents from start to finish, and publish reports to help everyone make better decisions.

many benefits to be had by using sharepoint 2010 include increase productivity, improve contextual search, keep internal documents at the forefront, improve adoption of campaign-critical documents and add a visual element to search.

Alternate Access  Mapping (AAM) is a feature that allows a website to use different URLs. This is usually needed when you have different zones, for example, one for the Intranet and another for an Extranet. I will not cover the network configuration part to setup an alternate URL in the DNS. I assume you already have an alternate URL and you just want to configure the AAM.

Step 1

Go to Start->Microsoft SharePoint 2010 Products->SharePoint 2010 Central Administration

Step 2

Go to Central Administration->Application Management->Manage Web applications.

Step 3

Click on web applications and select your “80” website, and on the top left click extend. In this way we are going to extend our site to port 81, so the users are comming from the outside world will use this port. Click on “Extend” and fill the following fields:

  1. Port: 81
  2. Host Header:
  3. Zone: Select Internet

Step 4
To check the bindings go to Server Manager->Roles->Web Server (IIS)->Internet Information Server.
Click on the site we are dealing, in this case will be called . On the right side click on bindings and be sure you receive something similar.

Step 5
We are going to change the authentication of the extended site now. Go to Central Administration->Application Management->Manage Web applications select the “80” Web application and click on Authentication Providers. You will receive this dialog, click on Internet.

Step 6
On IIS Authentication Settings un tick Integrated Windows authentication and tick Basic authentication (password is sent in clear text).

Step 7
Go to Server Manager->Configuration->Windows Firewall with->Inbound Rules-> Right click –> New Rule. Select Port and click Next. On specific local ports type 81 and click on Next –>Allow connection –> Next –> Domain, Public and private tick it! –>Next –>Type teh name of the rule and finish. Do the same with Outbound Rules.

Step 8
In my web application I created a site collection with a site called “hello”, this is how I will call it from Internet: . It will prompt for user and password!

so that is the tips for How To Configuring an Alternate Access Mapping (AAM) in SharePoint 2010. I really hope these tips can help solve your problem. thank you.