Several of the features already provided by Apache in its role as a robust Web server can be leveraged for increased functionality or security in Subversion as well. The Subversion client is able to use SSL, (the Secure Socket Layer, discussed earlier). If your Subversion client is built to support SSL, then it can access your Apache server using https:// and enjoy a high-quality encrypted network session.

Equally useful are other features of the Apache and Subversion relationship, such as the ability to specify a custom port (instead of the default HTTP port 80) or a virtual domain name by which the Subversion repository should be accessed, or the ability to access the repository through an HTTP proxy.

Finally, because mod_dav_svn is speaking a subset of the WebDAV/DeltaV protocol, it's possible to access the repository via third-party DAV clients. Most modern operating systems (Win32, OS X, and Linux) have the built-in ability to mount a DAV server as a standard network “shared folder”. This is a complicated topic, but also wondrous when implemented. For details, read Appendix C, WebDAV and Autoversioning.

Note that there are number of other small tweaks one can make to mod_dav_svn that are too obscure to mention in this chapter. For a complete list of all httpd.conf directives that mod_dav_svn responds to, see the section called “Directives”.