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Chapter 9. Networking
iptables supports -C option
This update adds support for the
-C check option to the iptables commands. Previously, there was no simple way to check if a certain rule existed. Now, the -C option can be used in a rule to check if a rule exists.
Support for IPv6 IP sets
This update adds support for IPv6 IP sets, as IP sets were not previously usable in IPv6 firewall rules.

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