NAME

       firewalld.conf - firewalld configuration file

SYNOPSIS

       /etc/firewalld/firewalld.conf

DESCRIPTION

       firewalld.conf is loaded by firewalld during the initialization process. The file contains the basic
       configuration options for firewalld.

OPTIONS

       These are the options that can be set in the config file:

       DefaultZone
           This sets the default zone for connections or interfaces if the zone is not selected or specified by
           NetworkManager, initscripts or command line tool. The default zone is public.

       MinimalMark
           Deprecated. This option is ignored and no longer used. Marks are no longer used internally.

       CleanupModulesOnExit
           Setting this option to yes or true unloads all firewall-related kernel modules when firewalld is
           stopped. The default value is no or false.

       CleanupOnExit
           If firewalld stops, it cleans up all firewall rules. Setting this option to no or false leaves the
           current firewall rules untouched. The default value is yes or true.

       Lockdown
           If this option is enabled, firewall changes with the D-Bus interface will be limited to applications
           that are listed in the lockdown whitelist (see firewalld.lockdown-whitelist(5)). The default value is
           no or false.

       IPv6_rpfilter
           If this option is enabled (it is by default), reverse path filter test on a packet for IPv6 is
           performed. If a reply to the packet would be sent via the same interface that the packet arrived on,
           the packet will match and be accepted, otherwise dropped. For IPv4 the rp_filter is controlled using
           sysctl.

           Note: This feature has a performance impact. In most cases the impact is not enough to cause a
           noticeable difference. It requires route lookups and its execution occurs before the established
           connections fast path. As such it can have a significant performance impact if there is a lot of
           traffic. It's enabled by default for security, but can be disabled if performance is a concern.

       IndividualCalls
           If this option is disabled (it is by default), combined -restore calls are used and not individual
           calls to apply changes to the firewall. The use of individual calls increases the time that is needed
           to apply changes and to start the daemon, but is good for debugging as error messages are more
           specific.

       LogDenied
           Add logging rules right before reject and drop rules in the INPUT, FORWARD and OUTPUT chains for the
           default rules and also final reject and drop rules in zones for the configured link-layer packet
           type. The possible values are: all, unicast, broadcast, multicast and off. The default setting is
           off, which disables the logging.

       AutomaticHelpers
           Deprecated. This option is ignored and no longer used.

       FirewallBackend
           Selects the firewall backend implementation. Possible values are; nftables (default), or iptables.
           This applies to all firewalld primitives. The only exception is direct and passthrough rules which
           always use the traditional iptables, ip6tables, and ebtables backends.

           Note: The iptables backend is deprecated. It will be removed in a future release.

       FlushAllOnReload
           Flush all runtime rules on a reload. In previous releases some runtime configuration was retained
           during a reload, namely; interface to zone assignment, and direct rules. This was confusing to users.
           To get the old behavior set this to "no". Defaults to "yes".

       ReloadPolicy
           The policy during reload. By default, all traffic except established connections is dropped while
           reloading the firewall rules. This can be overridden for INPUT, FORWARD and OUTPUT. The accepted
           values are "DROP", "REJECT" and "ACCEPT", which then applies to all tables. Alternatively, the policy
           can be specified per table, like "INPUT:REJECT,FORWARD:DROP,OUTPUT:ACCEPT". Defaults to
           "INPUT:DROP,FORWARD:DROP,OUTPUT:DROP".

       RFC3964_IPv4
           As per RFC 3964, filter IPv6 traffic with 6to4 destination addresses that correspond to IPv4
           addresses that should not be routed over the public internet. Defaults to "yes".

       AllowZoneDrifting
           Deprecated. This option is ignored and no longer used.

       NftablesFlowtable
           This may improve forwarded traffic throughput by enabling nftables flowtable. It is a software
           fastpath and avoids calling nftables rule evaluation for data packets. Its value is a space separate
           list of interfaces. Example value "eth0 eth1". Defaults to "off".

       NftablesCounters
           If set to yes, add a counter to every nftables rule. This is useful for debugging and comes with a
           small performance cost. Defaults to "no".

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

AUTHORS

       Thomas Woerner <twoerner@redhat.com>
           Developer

       Jiri Popelka <jpopelka@redhat.com>
           Developer

       Eric Garver <eric@garver.life>
           Developer