Mac OS X 10.5: About the Parental Controls Internet content filter
... If 'Allow access to only these websites' is selected in Parental Controls, the Internet content filter blocks any website which is not on the list. When the blocking web page is presented, a list of allowed websites is also shown. If using Safari, allowed websites are displayed as bookmarks in the bookmarks bar.The key word here is "most". In one site I tested it works as above. In another, only the main page is accessible. I can't find any documentation that explains why behavior varies by site. I'll try asking on Apple Discussions.
Note: For most websites, the Internet content filter considers the domain name and not the path. For example, if http://www.example.com is added to the list, then http://pictures.example.com will be allowed, as will http://www.example.com/movies....
Update 11/21/09b: We use OpenDNS on some kid machines, and OpenDNS supports a "shortcut" redirect like "simple" for simple.wikipedia.org. Except it doesn't work for this domain. Wikipedia is doing something unusual with IP addresses, perhaps as a side-effect of protecting user IP addresses. I think Wikipedia manages IP addresses differently for logged in users, so I'm going to explore that option next.
- From Admin account off content controls for the child account browser.
- In Child account create a user account on wikipedia and use their secure login: https://secure.wikimedia.org/wikipedia/simple/wiki/Special:UserLogin. Create a bookmark to this page.
- Go to main page: https://secure.wikimedia.org/wikipedia/simple/wiki/Main_Page. Create a bookmark to this page.
- Now return to Admin account and limit access controls to the above listed bookmarks.