A firewall is a network security system that controls traffic entering or leaving a network based on defined rules.
In a MikroTik network, firewall rules can allow, block or modify specific types of traffic. They can also be used to control access between users and devices. The Centipid chat discusses firewall rules, NAT rules and cases where a MikroTik firewall can block traffic and cause connectivity problems.
Related terms: Firewall Rule, Firewall Filter, NAT, NAT Rule, ACL, Walled Garden, Port, IP Address, MikroTik
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