iptables -F what it is? can it damage performance?

[Stephan]

iptables -F what it is? can it damage performance?

[sunardo_panjaitan]

-F option = --flush , it's option to delete all rules in chain or all chains.
For more information see the manual of iptables or just type iptables --help in your terminal.

[Stephan]

yes... does it effect on performance? because iptables -F always stared in rc.local on my server, when i removed this command, my server start working much better, and linux memory manage improved greatly.