The runtime configuration in firewalld is separated from the permanent configuration. This means that things can get changed in the runtime or permanent configuration.

OPTIONS

The following options are supported:

General Options

-h, --help

Prints a short help text and exists.

-V, --version

Print the version string of firewalld. This option is not combinable with other options.

-q, --quiet

Do not print status messages.

Status Options

--state

Check whether the firewalld daemon is active (i.e. running). Returns an exit code 0 if it is active, NOT_RUNNING otherwise (see the section called "EXIT CODES"). This will also print the state to STDOUT.

--reload

Reload firewall rules and keep state information. Current permanent configuration will become new runtime configuration, i.e. all runtime only changes done until reload are lost with reload if they have not been also in permanent configuration.

--complete-reload

Reload firewall completely, even netfilter kernel modules. This will most likely terminate active connections, because state information is lost. This option should only be used in case of severe firewall problems. For example if there are state information problems that no connection can be established with correct firewall rules.

Permanent Options

--permanent

The permanent option --permanent can be used to set options permanently. These changes are not effective immediately, only after service restart/reload or system reboot. Without the --permanent option, a change will only be part of the runtime configuration. The --permanent option can not be used with all options.

If you want to make a change in runtime and permanent configuration, use the same call with and without the--permanent option.

The --permanent option can be optionally added to all options further down where it is supported.

Zone Options

--get-default-zone

Print default zone for connections and interfaces.

--set-default-zone=zone

Set default zone for connections and interfaces where no zone has been selected. Setting the default zone changes the zone for the connections or interfaces, that are using the default zone.

This is a runtime and permanent change.

--get-active-zones

Print currently active zones altogether with interfaces and sources used in these zones. Active zones are zones, that have a binding to an interface or source. The output format is:

zone1
  interfaces: interface1 interface2 ..
  sources: source1 ..
zone2
  interfaces: interface3 ..
zone3
  sources: source2 ..
              

If there are no interfaces or sources bound to the zone, the corresponding line will be omitted.

[--permanent] --get-zones

Print predefined zones as a space separated list.

[--permanent] --get-services

Print predefined services as a space separated list.

[--permanent] --get-icmptypes

Print predefined icmptypes as a space separated list.

[--permanent] --get-zone-of-interface=interface

Print the name of the zone the interface is bound to or no zone.

[--permanent] --get-zone-of-source=source[/mask]

Print the name of the zone the source[/mask] is bound to or no zone.

[--permanent] --list-all-zones

List everything added for or enabled in all zones. The output format is:

zone1
  interfaces: interface1 ..
  sources: source1 ..
  services: service1 ..
  ports: port1 ..
  forward-ports:
        forward-port1
        ..
  icmp-blocks: icmp-type1 ..
  rich rules:
        rich-rule1
        ..
..
              

Options to Adapt and Query Zones

Options in this section affect only one particular zone. If used with --zone=zone option, they affect the zone zone. If the option is omitted, they affect default zone (see --get-default-zone).

[--permanent] [--zone=zone] --list-all

List everything added for or enabled in zone. If zone is omitted, default zone will be used.

[--permanent] [--zone=zone] --list-services

List services added for zone as a space separated list. If zone is omitted, default zone will be used.

[--permanent] [--zone=zone] --add-service=service [--timeout=seconds]

Add a service for zone. If zone is omitted, default zone will be used. This option can be specified multiple times. If a timeout is supplied, the rule will be active for the amount of seconds and will be removed automatically afterwards.

The service is one of the firewalld provided services. To get a list of the supported services, use firewall-cmd --get-services.

The --timeout option is not combinable with the --permanent option.

[--permanent] [--zone=zone] --remove-service=service

Remove a service from zone. This option can be specified multiple times. If zone is omitted, default zone will be used.

[--permanent] [--zone=zone] --query-service=service

Return whether service has been added for zone. If zone is omitted, default zone will be used. Returns 0 if true, 1 otherwise.

[--permanent] [--zone=zone] --list-ports

List ports added for zone as a space separated list. A port is of the form portid[-portid]/protocol, it can be either a port and protocol pair or a port range with a protocol. If zone is omitted, default zone will be used.

[--permanent] [--zone=zone] --add-port=portid[-portid]/protocol [--timeout=seconds]

Add the port for zone. If zone is omitted, default zone will be used. This option can be specified multiple times. If a timeout is supplied, the rule will be active for the amount of seconds and will be removed automatically afterwards.

The port can either be a single port number or a port range portid-portid. The protocol can either be tcp or udp.

The --timeout option is not combinable with the --permanent option.

[--permanent] [--zone=zone] --remove-port=portid[-portid]/protocol

Remove the port from zone. If zone is omitted, default zone will be used. This option can be specified multiple times.

[--permanent] [--zone=zone] --query-port=portid[-portid]/protocol

Return whether the port has been added for zone. If zone is omitted, default zone will be used. Returns 0 if true, 1 otherwise.

[--permanent] [--zone=zone] --list-icmp-blocks

List Internet Control Message Protocol (ICMP) type blocks added for zone as a space separated list. If zone is omitted, default zone will be used.

[--permanent] [--zone=zone] --add-icmp-block=icmptype [--timeout=seconds]

Add an ICMP block for icmptype for zone. If zone is omitted, default zone will be used. This option can be specified multiple times. If a timeout is supplied, the rule will be active for the amount of seconds and will be removed automatically afterwards.

The icmptype is the one of the icmp types firewalld supports. To get a listing of supported icmp types: firewall-cmd --get-icmptypes

The --timeout option is not combinable with the --permanent option.

[--permanent] [--zone=zone] --remove-icmp-block=icmptype

Remove the ICMP block for icmptype from zone. If zone is omitted, default zone will be used. This option can be specified multiple times.

[--permanent] [--zone=zone] --query-icmp-block=icmptype

Return whether an ICMP block for icmptype has been added for zone. If zone is omitted, default zone will be used. Returns 0 if true, 1 otherwise.

[--permanent] [--zone=zone] --list-forward-ports

List IPv4 forward ports added for zone as a space separated list. If zone is omitted, default zone will be used.

For IPv6 forward ports, please use the rich language.

[--permanent] [--zone=zone] --add-forward-port=port=portid[-portid]:proto=protocol[:toport=portid[-portid]][:toaddr=address[/mask]] [--timeout=seconds]

Add the IPv4 forward port for zone. If zone is omitted, default zone will be used. This option can be specified multiple times. If a timeout is supplied, the rule will be active for the amount of seconds and will be removed automatically afterwards.

The port can either be a single port number portid or a port range portid-portid. The protocol can either be tcp or udp. The destination address is a simple IP address.

The --timeout option is not combinable with the --permanent option.

For IPv6 forward ports, please use the rich language.

[--permanent] [--zone=zone] --remove-forward-port=port=portid[-portid]:proto=protocol[:toport=portid[-portid]][:toaddr=address[/mask]]

Remove the IPv4 forward port from zone. If zone is omitted, default zone will be used. This option can be specified multiple times.

For IPv6 forward ports, please use the rich language.

[--permanent] [--zone=zone] --query-forward-port=port=portid[-portid]:proto=protocol[:toport=portid[-portid]][:toaddr=address[/mask]]

Return whether the IPv4 forward port has been added for zone. If zone is omitted, default zone will be used. Returns 0 if true, 1 otherwise.

For IPv6 forward ports, please use the rich language.

[--permanent] [--zone=zone] --add-masquerade [--timeout=seconds]

Enable IPv4 masquerade for zone. If zone is omitted, default zone will be used. If a timeout is supplied, masquerading will be active for the amount of seconds. Masquerading is useful if the machine is a router and machines connected over an interface in another zone should be able to use the first connection.

The --timeout option is not combinable with the --permanent option.

For IPv6 masquerading, please use the rich language.

[--permanent] [--zone=zone] --remove-masquerade

Disable IPv4 masquerade for zone. If zone is omitted, default zone will be used. If the masquerading was enabled with a timeout, it will be disabled also.

For IPv6 masquerading, please use the rich language.

[--permanent] [--zone=zone] --query-masquerade

Return whether IPv4 masquerading has been enabled for zone. If zone is omitted, default zone will be used. Returns 0 if true, 1 otherwise.

For IPv6 masquerading, please use the rich language.

[--permanent] [--zone=zone] --list-rich-rules

List rich language rules added for zone as a newline separated list. If zone is omitted, default zone will be used.

[--permanent] [--zone=zone] --add-rich-rule='rule' [--timeout=seconds]

Add rich language rule 'rule' for zone. This option can be specified multiple times. If zone is omitted, default zone will be used. If a timeout is supplied, the rule will be active for the amount of seconds and will be removed automatically afterwards.

For the rich language rule syntax, please have a look at firewalld.richlanguage(5).

The --timeout option is not combinable with the --permanent option.

[--permanent] [--zone=zone] --remove-rich-rule='rule'

Remove rich language rule 'rule' from zone. This option can be specified multiple times. If zone is omitted, default zone will be used.

For the rich language rule syntax, please have a look at firewalld.richlanguage(5).

[--permanent] [--zone=zone] --query-rich-rule='rule'

Return whether a rich language rule 'rule' has been added for zone. If zone is omitted, default zone will be used. Returns 0 if true, 1 otherwise.

For the rich language rule syntax, please have a look at firewalld.richlanguage(5).

Options to Handle Bindings of Interfaces

Binding an interface to a zone means that this zone settings are used to restrict traffic via the interface.

Options in this section affect only one particular zone. If used with --zone=zone option, they affect the zone zone. If the option is omitted, they affect default zone (see --get-default-zone).

For a list of predefined zones use firewall-cmd --get-zones.

An interface name is a string up to 16 characters long, that may not contain ' ', '/', '!' and '*'.

[--permanent] [--zone=zone] --list-interfaces

List interfaces that are bound to zone zone as a space separated list. If zone is omitted, default zone will be used.

[--permanent] [--zone=zone] --add-interface=interface

Bind interface interface to zone zone. If zone is omitted, default zone will be used.

[--zone=zone] --change-interface=interface

Change zone the interface interface is bound to to zone zone. If zone is omitted, default zone will be used. If old and new zone are the same, the call will be ignored without an error. If the interface has not been bound to a zone before, it will behave like --add-interface.

[--permanent] [--zone=zone] --query-interface=interface

Query whether interface interface is bound to zone zone. Returns 0 if true, 1 otherwise.

[--permanent] [--zone=zone] --remove-interface=interface

Remove binding of interface interface from zone zone. If zone is omitted, default zone will be used.

Options to Handle Bindings of Sources

Binding a source to a zone means that this zone settings will be used to restrict traffic from this source.

A source address or address range is either an IP address or a network IP address with a mask for IPv4 or IPv6. For IPv4, the mask can be a network mask or a plain number. For IPv6 the mask is a plain number. The use of host names is not supported.

Options in this section affect only one particular zone. If used with --zone=zone option, they affect the zone zone. If the option is omitted, they affect default zone (see --get-default-zone).

For a list of predefined zones use firewall-cmd [--permanent] --get-zones.

[--permanent] [--zone=zone] --list-sources

List sources that are bound to zone zone as a space separated list. If zone is omitted, default zone will be used.

[--permanent] [--zone=zone] --add-source=source[/mask]

Bind source source[/mask] to zone zone. If zone is omitted, default zone will be used.

[--zone=zone] --change-source=source[/mask]

Change zone the source source[/mask] is bound to to zone zone. If zone is omitted, default zone will be used. If old and new zone are the same, the call will be ignored without an error. If the source has not been bound to a zone before, it will behave like --add-source.

[--permanent] [--zone=zone] --query-source=source[/mask]

Query whether the source source[/mask] is bound to the zone zone. Returns 0 if true, 1 otherwise.

[--permanent] [--zone=zone] --remove-source=source[/mask]

Remove binding of source source[/mask] from zone zone. If zone is omitted, default zone will be used.

Direct Options

The direct options give a more direct access to the firewall. These options require user to know basic iptables concepts, i.e. table (filter/mangle/nat/...), chain (INPUT/OUTPUT/FORWARD/...), commands (-A/-D/-I/...), parameters (-p/-s/-d/-j/...) and targets (ACCEPT/DROP/REJECT/...).

Direct options should be used only as a last resort when it's not possible to use for example --add-service=service or --add-rich-rule='rule'.

The first argument of each option has to be ipv4 or ipv6 or eb. With ipv4 it will be for IPv4 (iptables(8)), with ipv6 for IPv6 (ip6tables(8)) and with eb for ethernet bridges (ebtables(8)).

[--permanent] --direct --get-all-chains

Get all chains added to all tables.

This option concerns only chains previously added with --direct --add-chain.

[--permanent] --direct --get-chains { ipv4 | ipv6 | eb } table

Get all chains added to table table as a space separated list.

This option concerns only chains previously added with --direct --add-chain.

[--permanent] --direct --add-chain { ipv4 | ipv6 | eb } table chain

Add a new chain with name chain to table table.

There already exist basic chains to use with direct options, for example INPUT_direct chain (see iptables-save | grep direct output for all of them). These chains are jumped into before chains for zones, i.e. every rule put into INPUT_direct will be checked before rules in zones.

[--permanent] --direct --remove-chain { ipv4 | ipv6 | eb } table chain

Remove the chain with name chain from table table.

[--permanent] --direct --query-chain { ipv4 | ipv6 | eb } table chain

Return whether a chain with name chain exists in table table. Returns 0 if true, 1 otherwise.

This option concerns only chains previously added with --direct --add-chain.

[--permanent] --direct --get-all-rules

Get all rules added to all chains in all tables as a newline separated list of the priority and arguments.

[--permanent] --direct --get-rules { ipv4 | ipv6 | eb } table chain

Get all rules added to chain chain in table table as a newline separated list of the priority and arguments.

[--permanent] --direct --add-rule { ipv4 | ipv6 | eb } table chain priority args

Add a rule with the arguments args to chain chain in table table with priority priority.

The priority is used to order rules. Priority 0 means add rule on top of the chain, with a higher priority the rule will be added further down. Rules with the same priority are on the same level and the order of these rules is not fixed and may change. If you want to make sure that a rule will be added after another one, use a low priority for the first and a higher for the following.

[--permanent] --direct --remove-rule { ipv4 | ipv6 | eb } table chain priority args

Remove a rule with priority and the arguments args from chain chain in table table.

[--permanent] --direct --query-rule { ipv4 | ipv6 | eb } table chain priority args

Return whether a rule with priority and the arguments args exists in chain chain in table table. Returns 0 if true, 1 otherwise.

--direct --passthrough { ipv4 | ipv6 | eb } args

Pass a command through to the firewall. args can be all iptables, ip6tables and ebtables command line arguments.

--permanent --direct --get-all-passthroughs

Get all permanent passthrough as a newline separated list of the ipv value and arguments.

--permanent --direct --get-passthroughs { ipv4 | ipv6 | eb }

Get all permanent passthrough rules for the ipv value as a newline separated list of the priority and arguments.

--permanent --direct --add-passthrough { ipv4 | ipv6 | eb } args

Add a permanent passthrough rule with the arguments args for the ipv value.

--permanent --direct --remove-passthrough { ipv4 | ipv6 | eb } args

Remove a permanent passthrough rule with the arguments args for the ipv value.

--permanent --direct --query-passthrough { ipv4 | ipv6 | eb } args

Return whether a permanent passthrough rule with the arguments args exists for the ipv value. Returns 0 if true, 1 otherwise.

Lockdown Options

Local applications or services are able to change the firewall configuration if they are running as root (example: libvirt) or are authenticated using PolicyKit. With this feature administrators can lock the firewall configuration so that only applications on lockdown whitelist are able to request firewall changes.

The lockdown access check limits D-Bus methods that are changing firewall rules. Query, list and get methods are not limited.

The lockdown feature is a very light version of user and application policies for firewalld and is turned off by default.

--lockdown-on

Enable lockdown. Be careful - if firewall-cmd is not on lockdown whitelist when you enable lockdown you won't be able to disable it again with firewall-cmd, you would need to edit firewalld.conf.

This is a runtime and permanent change.

--lockdown-off

Disable lockdown.

This is a runtime and permanent change.

--query-lockdown

Query whether lockdown is enabled. Returns 0 if lockdown is enabled, 1 otherwise.

Lockdown Whitelist Options

The lockdown whitelist can contain commands, contexts, users and user ids.

If a command entry on the whitelist ends with an asterisk '*', then all command lines starting with the command will match. If the '*' is not there the absolute command inclusive arguments must match.

Commands for user root and others is not always the same. Example: As root /bin/firewall-cmd is used, as a normal user /usr/bin/firewall-cmd is be used on Fedora.

The context is the security (SELinux) context of a running application or service. To get the context of a running application use ps -e --context.

Warning: If the context is unconfined, then this will open access for more than the desired application.

The lockdown whitelist entries are checked in the following order:

1. context

2. uid

3. user

4. command

[--permanent] --list-lockdown-whitelist-commands

List all command lines that are on the whitelist.

[--permanent] --add-lockdown-whitelist-command=command

Add the command to the whitelist.

[--permanent] --remove-lockdown-whitelist-command=command

Remove the command from the whitelist.

[--permanent] --query-lockdown-whitelist-command=command

Query whether the command is on the whitelist. Returns 0 if true, 1 otherwise.

[--permanent] --list-lockdown-whitelist-contexts

List all contexts that are on the whitelist.

[--permanent] --add-lockdown-whitelist-context=context

Add the context context to the whitelist.

[--permanent] --remove-lockdown-whitelist-context=context

Remove the context from the whitelist.

[--permanent] --query-lockdown-whitelist-context=context

Query whether the context is on the whitelist. Returns 0 if true, 1 otherwise.

[--permanent] --list-lockdown-whitelist-uids

List all user ids that are on the whitelist.

[--permanent] --add-lockdown-whitelist-uid=uid

Add the user id uid to the whitelist.

[--permanent] --remove-lockdown-whitelist-uid=uid

Remove the user id uid from the whitelist.

[--permanent] --query-lockdown-whitelist-uid=uid

Query whether the user id uid is on the whitelist. Returns 0 if true, 1 otherwise.

[--permanent] --list-lockdown-whitelist-users

List all user names that are on the whitelist.

[--permanent] --add-lockdown-whitelist-user=user

Add the user name user to the whitelist.

[--permanent] --remove-lockdown-whitelist-user=user

Remove the user name user from the whitelist.

[--permanent] --query-lockdown-whitelist-user=user

Query whether the user name user is on the whitelist. Returns 0 if true, 1 otherwise.

Panic Options

--panic-on

Enable panic mode. All incoming and outgoing packets are dropped, active connections will expire. Enable this only if there are serious problems with your network environment. For example if the machine is getting hacked in.

This is a runtime only change.

--panic-off

Disable panic mode. After disabling panic mode established connections might work again, if panic mode was enabled for a short period of time.

This is a runtime only change.

--query-panic

Returns 0 if panic mode is enabled, 1 otherwise.

EXAMPLES

For more examples see m[blue]http://fedoraproject.org/wiki/FirewallDm[]

Example 1

Enable http service in default zone. This is runtime only change, i.e. effective until restart.

firewall-cmd --add-service=http
        

Example 2

Enable port 443/tcp immediately and permanently in default zone. To make the change effective immediately and also after restart we need two commands. The first command makes the change in runtime configuration, i.e. makes it effective immediately, until restart. The second command makes the change in permanent configuration, i.e. makes it effective after restart.

firewall-cmd --add-port=443/tcp
firewall-cmd --permanent --add-port=443/tcp
        

EXIT CODES

On success 0 is returned. In case of error one of the following error codes:

SEE ALSO

NOTES

firewalld home page at fedorahosted.org:

m[blue]http://fedorahosted.org/firewalld/m[]

More documentation with examples:

m[blue]http://fedoraproject.org/wiki/FirewallDm[]

AUTHORS

Thomas Woerner <twoerner@redhat.com>

Developer

Jiri Popelka <jpopelka@redhat.com>

Developer