Ubuntu Manpages

firewalld.direct

firewalld direct configuration file

/etc/firewalld/direct.xml

A firewalld direct configuration file contains the information about permanent direct chains and rules. These are the chains, rules and passthrough ...

This is the structure of a direct configuration file:

<?xml version="1.0" encoding="utf-8"?>
<direct>
  [ <chain ipv="ipv4|ipv6" table="table" chain="chain"/> ]
  [ <rule ipv="ipv4|ipv6" table="table" chain="chain" priority="priority"> args </rule> ]
  [ <passthrough ipv="ipv4|ipv6"> args </passthrough> ]
</direct>

The mandatory direct start and end tag defines the direct. This tag can only be used once in a direct configuration file. There are no attributes for direct.

Is an optional empty-element tag and can be used several times. It can be used to define names for additional chains. A chain entry has exactly three attributes:

ipv="ipv4|ipv6"

The IP family where the chain will be created. This can be either ipv4 or ipv6.

table="table"

The table name where the chain will be created. This can be one of the tables that can be used for iptables or ip6tables. For the possible values, please have a look at the TABLES section in the iptables man pages: For ipv="ipv4" in iptables(8), for ipv="ipv6" in ip6tables(8).

chain="chain"

The name of the chain, that will be created. Please make sure that there is no other chain with this name already.

Please remember to add a rule or passthrough rule with an --jump or --goto option to connect the chain to another one.

Is an optional element tag and can be used several times. It can be used to add rules to a built-in or added chain. A rule entry has exactly four attributes:

ipv="ipv4|ipv6"

The IP family where the rule will be added. This can be either ipv4 or ipv6.

table="table"

The table name where the chain will be created. This can be one of the tables that casn be used for iptables or ip6tables. For the possible values, please have a look at the TABLES section in the iptables man pages: For ipv="ipv4" in iptables(8), for ipv="ipv6" in ip6tables(8).

chain="chain"

The name of the chain where the rule will be added. This can be either a built-in chain or a chain that has been created with the chain tag.

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.

The args can be any arguments of iptables or ip6tables, that do not conflict with the table or chain attributes.

If the chain name is a built-in chain, then the rule will be added to chain_direct, else the supplied chain name is used. chain_direct is created internally for all built-in chains to make sure that the added rules do not conflict with the rules created by firewalld.

Is an optional element tag and can be used several times. It can be used to add rules to a built-in or added chain. A rule entry has exactly one attribute:

ipv="ipv4|ipv6"

The IP family where the passthrough rule will be added. This can be either ipv4 or ipv6.

The args can be any arguments of iptables or ip6tables.

The passthrough rule will be added to the chain directly. There is no mechanism like for the direct rule above. The user of the passthrough rule has to make sure that there will be no conflict with the rules created by firewalld.

Blacklisting of the networks 192.168.1.0/24 and 192.168.5.0/24 with logging and dropping early in the raw table:

<?xml version="1.0" encoding="utf-8"?>
<direct>
  <chain ipv="ipv4" table="raw" chain="blacklist"/>
  <rule ipv="ipv4" table="raw" chain="PREROUTING" priority="0">-s 192.168.1.0/24 -j blacklist</rule>
  <rule ipv="ipv4" table="raw" chain="PREROUTING" priority="1">-s 192.168.5.0/24 -j blacklist</rule>
  <rule ipv="ipv4" table="raw" chain="blacklist" priority="0">-m limit --limit 1/min -j LOG --log-prefix "blacklisted: "</rule>
  <rule ipv="ipv4" table="raw" chain="blacklist" priority="1">-j DROP</rule>
</direct>

firewall-applet(1), firewalld(1), firewall-cmd(1), firewall-config(1), firewalld.conf(5), firewalld.direct(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 home page at fedorahosted.org:

http://fedorahosted.org/firewalld/

More documentation with examples:

http://fedoraproject.org/wiki/FirewallD

Thomas Woerner <twoerner@redhat.com>

Developer

Jiri Popelka <jpopelka@redhat.com>

Developer