Run W3C link checker against J2SE documentation site, security section, the results is:

6 broken fragments/links
2 occurrences on accessing non public document (using password to accessing documents)
2 duplicate/empty anchors on web pages.
14 redirections to other sites.

The broken links need to be fixed.

steps to reproduce:
1. go to http://validator.w3.org/checklink
2. paste http://java.sun.com/j2se/1.4.2/docs/guide/security/index.html into the address field
3. check "summary only" and "Check linked documents recursively" in Options field
4. specify recursion depth to 20
5. click "check" button
6. a result similar to attached file will be generated.