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What are the differences between Public URL and Internal URL when configuring Alternate Access Mappings in SharePoint2010

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2 Answers 2

up vote 5 down vote accepted

Say for instance your website is:

http://treecutters.com

That is the public url, the url that you want most people to see.

That site may be delivered by two internal servers that are load balanced, people should never see these addresses

http://server1.treecutters.com
http://server2.treecutters.com

Normally, when those sites render links, they would be displayed as http://server1.treecutters.com or http://server2.treecutters.com, because that is the server they are running on. AAMs allow sharepoint to replace those links with the public url. Things like links, navigation, search results, picture urls can all be effected by AAMs.

Another possiblity is when you public url is a secure site

https://securetreecutters.com

And you want your proxy server to terminiate the SSL connection, then pass standard HTTP traffic to the same two internal servers (Off Box SSL/HTTPS termination)

http://server1.treecutters.com
http://server2.treecutters.com
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Your Internal and Public URLs should always be the same unless you're using something like a hardware load balancer, or a reverse proxy; something that rewrites URLs. If you haven't got anything in place that's rewriting your URLs, they should be the same.

More info @ http://www.eggheadcafe.com/software/aspnet/30014687/internal-url-vs-external-url.aspx

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