NAME

       firewalld.zones - firewalld zones

DESCRIPTION

   What is a zone?
       A network zone defines the level of trust for network connections. This is a one to many
       relation, which means that a connection can only be part of one zone, but a zone can be
       used for many network connections.

       The zone defines the firewall features that are enabled in this zone:

       Intra Zone Forwarding
           Allows packets received by a zone to be forwarded to other interfaces or sources
           within the same zone, even if the zone's target is not ACCEPT.

       Predefined services
           A service is a combination of port and/or protocol entries. Optionally netfilter
           helper modules can be added and also a IPv4 and IPv6 destination address.

       Ports and protocols
           Definition of tcp, udp, sctp or dccp ports, where ports can be a single port or a port
           range.

       ICMP blocks
           Blocks selected Internet Control Message Protocol (ICMP) messages. These messages are
           either information requests or created as a reply to information requests or in error
           conditions.

       ICMP block inversion
           Changes how ICMP messages are handled. When enabled, all ICMP message types are
           blocked, except for those in the ICMP block list.

       Masquerading
           The addresses of a private network are mapped to and hidden behind a public IP
           address. This is a form of address translation.

       Forward ports
           A forward port is either mapped to the same port on another host or to another port on
           the same host or to another port on another host.

       Rich language rules
           The rich language extends the elements (service, port, icmp-block, masquerade,
           forward-port and source-port) with additional source and destination addresses,
           logging, actions and limits for logs and actions. It can also be used for host or
           network white and black listing (for more information, please have a look at
           firewalld.richlanguage(5)).

       For more information on the zone file format, please have a look at firewalld.zone(5).

   Which zones are available?
       Here are the zones provided by firewalld sorted according to the default trust level of
       the zones from untrusted to trusted:

       drop
           Any incoming network packets are dropped, there is no reply. Only outgoing network
           connections are possible.

       block
           Any incoming network connections are rejected with an icmp-host-prohibited message for
           IPv4 and icmp6-adm-prohibited for IPv6. Only network connections initiated within this
           system are possible.

       public
           For use in public areas. You do not trust the other computers on networks to not harm
           your computer. Only selected incoming connections are accepted.

       external
           For use on external networks with masquerading enabled especially for routers. You do
           not trust the other computers on networks to not harm your computer. Only selected
           incoming connections are accepted.

       dmz
           For computers in your demilitarized zone that are publicly-accessible with limited
           access to your internal network. Only selected incoming connections are accepted.

       work
           For use in work areas. You mostly trust the other computers on networks to not harm
           your computer. Only selected incoming connections are accepted.

       home
           For use in home areas. You mostly trust the other computers on networks to not harm
           your computer. Only selected incoming connections are accepted.

       internal
           For use on internal networks. You mostly trust the other computers on the networks to
           not harm your computer. Only selected incoming connections are accepted.

       trusted
           All network connections are accepted.

   Which zone should be used?
       A public WIFI network connection for example should be mainly untrusted, a wired home
       network connection should be fairly trusted. Select the zone that best matches the network
       you are using.

   How to configure or add zones?
       To configure or add zones you can either use one of the firewalld interfaces to handle and
       change the configuration: These are the graphical configuration tool firewall-config, the
       command line tool firewall-cmd or the D-Bus interface. Or you can create or copy a zone
       file in one of the configuration directories.  /usr/lib/firewalld/zones is used for
       default and fallback configurations and /etc/firewalld/zones is used for user created and
       customized configuration files.

   How to set or change a zone for a connection?
       The zone is stored into the ifcfg of the connection with ZONE= option. If the option is
       missing or empty, the default zone set in firewalld is used.

       If the connection is controlled by NetworkManager, you can also use nm-connection-editor
       to change the zone.

       For the addition or change of interfaces that are not under control of NetworkManager:
       firewalld tries to change the ZONE setting in the ifcfg file, if an ifcfg file exists that
       is using the interface.

       Only for the removal of interfaces that are not under control of NetworkManager: firewalld
       is not trying to change the ZONE setting in the ifcfg file. This is needed to make sure
       that an ifdown of the interface will not result in a reset of the zone setting to the
       default zone. Only the zone binding is then removed in firewalld then.

SEE ALSO

       firewall-applet(1), firewalld(1), firewall-cmd(1), firewall-config(1), firewalld.conf(5),
       firewalld.direct(5), firewalld.dbus(5), firewalld.icmptype(5), firewalld.lockdown-
       whitelist(5), firewall-offline-cmd(1), firewalld.richlanguage(5), firewalld.service(5),
       firewalld.zone(5), firewalld.zones(5), firewalld.policy(5), firewalld.policies(5),
       firewalld.ipset(5), firewalld.helper(5)

NOTES

       firewalld home page:
           http://firewalld.org

       More documentation with examples:
           http://fedoraproject.org/wiki/FirewallD

AUTHORS

       Thomas Woerner <twoerner@redhat.com>
           Developer

       Jiri Popelka <jpopelka@redhat.com>
           Developer

       Eric Garver <eric@garver.life>
           Developer