I have setup an apache (SUExec/fcgi) with the help of ISPConfig3.
In order to find a suitable solution I started off with the typo3 sources within the webserver directory.
When I try calling the typo3 backend I get the following error:
Warning: fopen() [function.fopen]: open_basedir restriction in effect.
is not within the allowed path(s):
in /var/www/clients/client2/web2/web/t3lib/class.t3lib_div.php on line 2752
[function.fopen]: failed to open stream:
Operation not permitted in /var/www/clients/client2/web2/web/t3lib/class.t3lib_div.php on line 2752
ERROR: File not written to disk! Write permission error in filesystem?
Clearly this error message contradicts itself since the file in question is in the directory that is defined in the open_basedir statement.