LinuxBabu ………..Linux System Admin Blog….

While installing APF on your VPS you get the following error :

# apf -r
apf(28442): {glob} status log not found, created
apf(28463): {glob} flushing & zeroing chain policies
apf(28463): {glob} firewall offline
apf(28500): {glob} activating firewall
apf(28551): {glob} unable to load iptables module (ip_tables), aborting.
apf(28500): {glob} firewall initalized
apf(28500): {glob} !!DEVELOPMENT MODE ENABLED!! - firewall will flush every 5 minutes.

You need to configure the APF for your VPS.

nano -w /etc/apf/conf.apf

modify
SET_MONOKERN="0"

to
SET_MONOKERN="1"

Restart APF

apf -r