Zones in a firewall refer to the different parts of a network that are protected by the firewall. These zones can be based on the type of traffic that is allowed to flow through the firewall, such as permitting traffic from a particular computer or network to flow in and out, or permitting only specific types of traffic.
Zones can be used in conjunction with filters, which are specific rules that are applied to traffic that passes through the firewall. Filters can be based on the source or destination address, protocol, or port number.
A firewall should be configured with at least one zone for each type of traffic that needs to be protected. Additional zones can be added to protect additional parts of the network.
Zones should be configured to allow only the traffic that needs to be allowed through the firewall. This traffic should be marked as trusted traffic.
Any traffic that is not marked as trusted should be denied.
Zones can be configured to allow specific types of traffic to pass through the firewall, such as HTTP traffic and FTP traffic.
Zones can be used to segment the network into different areas, and then different types of traffic can be sent to different zones.
A firewall should be reconfigured if the zones are changed.
Zones can be used to protect the network from outside threats, and they can also be used to protect the network from threats that may be internal to the organization.
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