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