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7. When everything goes wrong!

Firewalling in Linux may be deadly. An improper configuration can bring the network to its knees. One command that may save your day is

        netconf --resetfw

This command deactivates all firewalling rules. It does not affect the configuration -- it affects only the working set.

        netconf --update

will reactivate the rules. You may need to use those two commands to check out if a network malfunction is caused by your firewalling rules or not.

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