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Alternate Access Mappings is a feature of SharePoint which allows a website to function correctly under different URL scenarios, including, reverse proxies and load balancing. It is a common practice used by many companies for their internal and external users. Let me try to explain how to configure Alternate Access Mappings:

Let’s say you have top level site collection URL is http://ferdous-bs AND You would like to make URL for external user and for internal user.

1. Go to Central Administration –> Alternate Access Mapping –>


2. Add host name( in the host file at c:\Windows\System32\drivers\etc\hosts as same as below. Here you can use your server IP instead


If you want to access from network then Complete the network configuration for the alternate URL that you are planning to map with for internal user. It means IP has to be resolve when internal user hit on this URL.

3. Try to access the site from your server using

4. Opps! You will get “Authentication Error” if you access from for Host Server but you can solve it using edit registry. Follow the instruction that I written at

5. Now you should able to access your site from network or from server using


Posted on Wednesday, June 20, 2012 8:18 PM | Back to top

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