Tell ISPConfig to stop trying to initialize iptables

[Quasdunk]

I've installed ISPConfig 3 on a vServer on which I'm not able to use iptables.

I believe I was able to get fail2ban running via a php-scrip accessing the server's web-interface and adding/deleting the firewall-rules there (the script is working fine, but I haven't seen any ban-events triggered yet, which is very unusual, because we could observe break-in attempts permanently on the old server).

The ISPConfig-log, however, keeps telling me the same thing over and over again:

/var/log/ispconfig/cron.log:

iptables v1.4.12: can't initialize iptables table `filter': Permission denied (you must be root)
Perhaps iptables or your kernel needs to be upgraded.
ip6tables v1.4.12: can't initialize ip6tables table `filter': Permission denied (you must be root)
Perhaps ip6tables or your kernel needs to be upgraded.

How can I make it stop - or maybe even fix it?