By default, IIS 6.0 will not serve unknown extensions and this includes exe and dmg files. When a user requests such file, IIS will reply back with a 404 status code.
The solution to this problem is to allow the exe extension.
To allow exe files to be downloaded to the client, follow these steps:
- Open IIS Manager
- Right click the folder where the exe-files are located and click Properties.
- Click the “HTTP Headers” tab
- Click on the “MIME Types” button
- Click New
- In the extension box, type .exe .dmg
- In the MIME Type box, type application/octet-stream
- Apply the new settings