firewalld LWRP

Firewalld is the userland interface to dynamically managing a Linux firewall, introduced in Fedora 15 and Centos/RHEL 7.

Resource Overview

This firewalld cookbook provides three resources for adding and removing services, ports, and rules.

service

The firewalld_service resource will add the service for a zone to the current and permanent configurations. The service name is one of the firewalld provided services. To get a list of the supported services, use firewalld-cmd --get-services. If zone is omitted, default zone will be used.

Actions

• :add - add the service to the current and permanent configuration
• :remove - remove the service from the current and permanent configuration

Attributes

<table>
<tr>
<th>Attribute</th>
<th>Description</th>
<th>Example</th>
<th>Default</th>
</tr>
<tr>
<td>service</td>
<td>(name attribute) the service to manage</td>
<td>http</td>
<td></td>
</tr>
<tr>
<td>zone</td>
<td><code>firewalld</code> zone to add or remove service from</td>
<td>public</td>
<td>(none, uses default zone)</td>
</tr>
</table>

Default action adds a service to the firewall:

firewalld_service 'http'

This will allow access to the http service in the default zone.

:add

Add the service to zone. If zone is omitted, default zone will be used.

firewalld_service 'tftp' do
    action :add
    zone   'public'
end

:remove

Removes the service from zone. If zone is omitted, default zone will be used.

firewalld_service 'telnet' do
action :remove
zone   'public'
end

port

The firewalld_port resource will add the port for a zone to the current and permanent configurations. If zone is omitted, default zone will be used.

Actions

• :add - add the port to the current and permanent configuration
• :remove - remove the port from the current and permanent configuration

Attributes

<table>
<tr>
<th>Attribute</th>
<th>Description</th>
<th>Example</th>
<th>Default</th>
</tr>
<tr>
<td>port</td>
<td>(name attribute) the port to manage</td>
<td>993/tcp</td>
<td></td>
</tr>
<tr>
<td>zone</td>
<td><code>firewalld</code> zone to add or remove port from</td>
<td>public</td>
<td>(none, uses default zone)</td>
</tr>
</table>

Default action adds a port to the firewall:

firewalld_port '993/tcp'

This will allow access to TCP port 993 in the default zone.

:add

Add the port to zone. If zone is omitted, default zone will be used.

firewalld_port '993/tcp' do
  action :add
  zone   'public'
end

:remove

Removes the port from zone. If zone is omitted, default zone will be used.

firewalld_port '993/tcp' do
    action :remove
    zone   'public'
end

rich_rule

The firewalld_rich_rule resource allows you to create complex rules directly onto the firewall. It will load the rule into the running config and pass it to firewalld with the --permanent flag, to persist it after a reload.

Actions

• :add - add the rich rule to the current and permanent configuration
• :remove - remove the rich rule from the current and permanent configuration

Attributes

The attributes for rich_rule map directly to the firewall-cmd (1) command-line parameters. More can be read here: Complex Firewall Rules with Rich Language and firewalld.richlanguage (5).

<table>
<tr>
<th>Attribute</th>
<th>Description</th>
<th>Example</th>
<th>Default</th>
</tr>

<tr>
<td>name</td>
<td>(name attribute) The name of the resource. This is not passed to firewall-cmd.</td>
<td>ssh_add</td>
<td></td>
</tr>

<tr>
<td>zone</td>
<td><code>firewalld</code> zone to add or remove port from</td>
<td>public</td>
<td>(none, uses default zone)</td>
</tr>

<tr>
<td>family</td>
<td>IP family. Choice of 'ipv4' or 'ipv6'.</td>
<td>ipv6</td>
<td>ipv4</td>
</tr>

<tr>
<td>source_address</td>
<td>Limits the origin of a connection attempt to a specific range of IPs.</td>
<td>192.168.100.5/32</td>
<td>(none, not limited)</td>
</tr>

<tr>
<td>destination_address</td>
<td>Limits the target of a connection attempt to a specific range of IPs.</td>
<td>192.168.100.5/32</td>
<td>(none, not limited)</td>
</tr>

<tr>
<td>service_name</td>
<td>The service name is one of the firewalld provided services. To get a list of the supported services, use firewalld-cmd --get-services.</td>
<td>ssh</td>
<td></td>
</tr>

<tr>
<td>port_number</td>
<td>Can be a single integer or a port range, for example '5060-5062'. The protocol can be specified. Requires that port_protocol attribute be specified also.</td>
<td>5060</td>
<td></td>
</tr>

<tr>
<td>port_protocol</td>
<td>The protocol for the specified port, can be 'tcp' or 'udp'. Requires that port_number attribute be specified also.</td>
<td>tcp</td>
<td></td>
</tr>

<tr>
<td>log_prefix</td>
<td>Logs new connection attempts with kernel logging. This will prepend the log lines with this prefix.</td>
<td>ssh</td>
<td></td>
</tr>

<tr>
<td>log_level</td>
<td>Can be one of 'emerg', 'alert', 'error', 'warning', 'notice',
'info', or 'debug'.</td>
<td>info</td>
<td></td>
</tr>

<tr>
<td>limit_value</td>
<td>Limits the rate at which logs are written.</td>
<td>1/m</td>
<td>1/m - one write per minute</td>
</tr>

<tr>
<td>firewall_action</td>
<td>Can be one of 'accept', 'reject', or 'drop'. This is the behavior by which all traffic that matches the rule will be handled.</td>
<td>accept</td>
<td></td>
</tr>

</table>

add

# This opens the ssh service to ip `192.168.100.5` and logs at a rate of
# 1 entry per minute with a prefix of ssh on each log entry.
#

firewalld_rich_rule "ssh_add" do
  zone 'public'
  family 'ipv4'
  source_address '192.168.100.5/32'
  service_name 'ssh'
  log_prefix 'ssh'
  log_level 'info'
  limit_value '1/m'
  firewall_action 'accept'
  action :add
end

Usage

If you're using Berkshelf, just add firewalld to your
Berksfile and metadata.rb:

# Berksfile
cookbook 'firewalld'

# metadata.rb
depends 'firewalld'

Contributing

1. Fork the project
2. Create a feature branch corresponding to you change
3. Commit and test thoroughly
4. Create a Pull Request on github

License & Authors

• Author:: Jeff Hutchison jeff@jeffhutchison.com
• Author:: Manuel Toledo mtoledo@adobe.com

Copyright 2015, Jeff Hutchison

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.