You might have come across issues with csf on VPSes. CSF requires at least these iptables modules to work properly: ip_tables ipt_state ipt_multiport iptable_filter ipt_limit ipt_LOG ipt_REJECT ipt_conntrack ip_conntrack ip_conntrack_ftp iptable_mangle Other modules for additional functionality: ipt_owner ipt_recent iptable_nat ipt_REDIRECT You can check the hosting environment using : /etc/csf/csftest.pl This should run without any FATAL […]