Ubuntu Manpage: firewalld.conf - firewalld configuration file

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.

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.

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 individiual 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.

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".

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
Older versions of firewalld had undocumented behavior known as "zone drifting". This allowed packets
to ingress multiple zones - this is a violation of zone based firewalls. However, some users rely on
this behavior to have a "catch-all" zone, e.g. the default zone. You can enable this if you desire
such behavior. It's disabled by default for security reasons. Note: If "yes" packets will only drift
from source based zones to interface based zones (including the default zone). Packets never drift
from interface based zones to other interfaces based zones (including the default zone). Valid
values; "yes", "no". Defaults to "no".

NOTES

       firewalld home page:
           http://firewalld.org

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

AUTHORS