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Does iptables -F permanently delete all iptables rules?

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linux-howto

http://unix.stackexchange.com – In a RHEL training document, the author says: ...run the following command to disable the firewall on the current system: iptables -F He explicitly uses the word "disable" which to me suggests that it will be simple to re-enable. In reading the man page though for iptables, I see this: Flush the selected chain (all the chains in the table if none is given). This is equivalent to deleting all the rules one by one. Can I get clarification on the expected behavior? (HowTos)