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To restrict Subversion repository access to certain groups and/or users, you can add the Require group and Require user directives, described in the page on integrating Crowd with Apache.
For more fine-grained access, Crowd provides the AuthzSVNCrowdAccessFile directive which allows you to define path-based access rules.
These changes modifications need to be made to the default file in /etc/apache2/sites-available/
Also the code added must be located before the error log code in the file.
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