Q: Why is my webspace (http://www.physics.utoronto.ca/~user) showing a 403 Forbidden error?
Your home directory must have an index page (index.html). Your home directory is blocked from listing content. If you get the 403 Forbidden error, just create an index.html page.
Q: Why can't I list directories on my web page?
Directory listing is blocked by default. If you wish to list content on your web space, create a folder "pub"in your web_docs directory and put the content in there.