Webdav

I should have started documenting this from the beginning, but hopefully this helps.

 <VirtualHost cal.example.com:80>
	ServerAdmin frank@example.com
        ServerName cal.example.com
	DocumentRoot /var/www/cal.example.com
	<Directory />
		Options FollowSymLinks
		AllowOverride all
 #                Order allow,deny
 # This line below, allows my subnet only (which if my IP is 1.2.3.4, I used the first 3 octets)!
        Allow from 1.2.3
	</Directory>
	ErrorLog ${APACHE_LOG_DIR}/webdav.error.log
	# Possible values include: debug, info, notice, warn, error, crit,
	# alert, emerg.
	LogLevel warn
	CustomLog ${APACHE_LOG_DIR}/webdav.access.log combined
        Alias /webdav /var/www/cal.example.com/webdav
       <Location /webdav>
           Dav On
           AuthType Basic
           AuthName "webdav"
           AuthUserFile /var/www/cal.example.com/passwd.dav
           Require valid-user
       </Location>
 </VirtualHost>

In your apache logs, if you see:

 (13)Permission denied: An error occurred while opening a resource.  [500, #0]

then make sure this matches (apache needs write permissions to the webdav directory!)

webdav$ ls -la
total 12
drwxrwxr-x 2 root     www-data 4096 Apr 24 05:50 .
drwxr-xr-x 4 www-data www-data 4096 Apr 24 04:07 ..
-rw-r--r-- 1 www-data www-data 2970 Apr 24 05:50 mycal.ics