WebDAV

WebDAV allows people to share files over a http server. This can be used for subversion repositories but also for ical standard calendars in Outlook with the publish to internet / webdav server option.

In basic form it's an insert of the module in apache which you then activate:

<Directory /export/home/wip/websites/Admin/Calendars>
        DAV On
</Directory>

This page shows some of the basics and security is discussed in the comments

This page discusses security and access possibities. It's specific to SVN but can be used for anything

This discusses how to set up webdav with LDAP support for authentication

NB Make sure the lockfile and directories as well as the directories and files which are web-dav-ed are writeable to the webserver user.