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Firewalld
From Gentoo Wiki (test)
FirewallD is DBUS-enabled firewall software for Linux, which works on top of the in-kernel iptables firewall. It was created by RedHat, but it is available on many Linux distributions, including in Gentoo as net-firewall/firewalld.
See Also
- Iptables — a program used to configure and manage the kernels netfilter modules.