A firewall zone defines the trust level for a connection, interface or source address binding. This is a one to many relation, which means that a connection, interface or source can only be part of one zone, but a zone can be used for many network connections, interfaces and sources.
Here is more information about zones:
- Predefined Zones
- Connections, Interfaces and Sources
- Configuration of Zones
- Default Zone
- Use of Zones
Further zone configuration options and generic information about zones are also described in the firewalld.zone man page.