1. Open IIS Manager (run -> inetmgr)
2. In the Connections pane, expand the Sites node in the tree, and then click to select the site for which you want to add/edit binding.
3. Right click on the site and click Edit bindings
4. Select Port on the site binding pane
5. Click Edit button
6. In Edit Site Binding pane type port (ex. 1080) and click Ok