Your kernel is compiled with iptables statically instead of as a module, to resolve this you will need to change a small configuration in /etc/apf/conf.apf
SET_MONOKERN=”0″ Set it to “1″
Once this is done, restart apf to see the error vanishing.
# This allows the firewall to work around modular kernel issues by assuming
# that the system has all required firewall modules compiled directly into
# kernel. This mode of operation is not generally recommended but can be used
# scale APF to unique situations.
Out of memory? Did you upgrade your OS recently? Then carefully have a look at ps -auwx output for memory consumption.
Today I found that initscripts package owned minilogd was eating up almost 70% of the server resources on a VPS running on OpenVZ virtualization. After reading a bit about it on the internet I found that it’s used by syslog and I had to restart syslog service to get the issue sorted out.
Alway make good use of the tools given by Linux to monitor the processes. They will surely help you to knockdown the problem that you’re facing.