In IIS6, it was with the website properties --> HTTP Headers. Here in IIS7, you can do this on the "HTTP Response Headers" feature on the website.

  • Select the website in the Connections pane.
  • Double click on the "HTTP Response Headers" feature in the features pane
  • In the action pane, click on the "Set Common Headers..."

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  • You will see the following popup

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Now, you know what to select. You should enable the HTTP Keep-Alive on this popup only.

Happy Learning IIS7!