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    Copyright
    Preface
    Ch. 1. Installation
    Ch. 2. Adding Common Modules
    Ch. 3. Logging
    Ch. 4. Virtual Hosts
    Ch. 5. Aliases, Redirecting, and Rewriting
    Ch. 6. Security
    Recipe 6.1. Using System Account Information for Web Authentication
    Recipe 6.2. Setting Up Single-Use Passwords
    Recipe 6.3. Expiring Passwords
    Recipe 6.4. Limiting Upload Size
    Recipe 6.5. Restricting Images from Being Used Off-Site
    Recipe 6.6. Requiring Both Weak and Strong Authentication
    Recipe 6.7. Managing .htpasswd Files
    Recipe 6.8. Making Password Files for Digest Authentication
    Recipe 6.9. Relaxing Security in a Subdirectory
    Recipe 6.10. Lifting Restrictions Selectively
    Recipe 6.11. Authorizing Using File Ownership
    Recipe 6.12. Storing User Credentials in a MySQL Database
    Recipe 6.13. Accessing the Authenticated Username
    Recipe 6.14. Obtaining the Password Used to Authenticate
    Recipe 6.15. Preventing Brute-Force Password Attacks
    Recipe 6.16. Using Digest Versus Basic Authentication
    Recipe 6.17. Accessing Credentials Embedded in URLs
    Recipe 6.18. Securing WebDAV
    Recipe 6.19. Enabling WebDAV Without Making Files Writable by the Web User
    Recipe 6.20. Restricting Proxy Access to Certain URLs
    Recipe 6.21. Protecting Files with a Wrapper
    Recipe 6.22. Protecting Server Files from Malicious Scripts
    Recipe 6.23. Setting Correct File Permissions
    Recipe 6.24. Running a Minimal Module Set
    Recipe 6.25. Restricting Access to Files Outside Your Web Root
    Recipe 6.26. Limiting Methods by User
    Recipe 6.27. Restricting Range Requests
    Rebutting DoS Attacks with mod_evasive
    Chrooting Apache with mod_security
    Migrating to 2.2 Authentication
    Recipe 6.31. Blocking Worms with mod_security
    Recipe 6.32. Mixing Read-Only and Write Access to a Subversion Repository
    Recipe 6.33. Using Permanent Redirects to Obscure Forbidden URLs
    Ch. 7. SSL
    Ch. 8. Dynamic Content
    Ch. 9. Error Handling
    Ch. 10. Proxies
    Ch. 11. Performance
    Ch. 12. Directory Listings
    Ch. 13. Miscellaneous Topics
    Appx. A. Using Regular Expressions in Apache
    Appx. B. Troubleshooting
    Colophon
    Index
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    Chapter 6. Security > Using Permanent Redirects to Obscure Forbidden URLs

    Recipe 6.33. Using Permanent Redirects to Obscure Forbidden URLs

    6.33.1. Problem

    When access to a file is forbidden, you don’t want the user’s browser to show its URL.

    6.33.2. Solution

    Add an ErrorDocument script that issues a permanent redirect to a “document not found” message page:


      

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