windows_firewall_rule resource¶

Use the windows_firewall_rule resource to create, change or remove windows firewall rules.

New in Chef Client 14.7.

Syntax¶

The windows_firewall_rule resource has the following syntax:

windows_firewall_rule 'name' do
  description          String # default value: "Firewall rule"
  direction            Symbol, String # default value: :inbound
  enabled              true, false # default value: true
  firewall_action      Symbol, String # default value: :allow
  interface_type       Symbol, String # default value: :any
  local_address        String
  local_port           String, Integer, Array
  profile              Symbol, String, Array # default value: :any
  program              String
  protocol             String # default value: "TCP"
  remote_address       String
  remote_port          String, Integer, Array
  rule_name            String # default value: 'name' unless specified
  service              String
  action               Symbol # defaults to :create if not specified
end

where:

windows_firewall_rule is the resource.
name is the name given to the resource block.
action identifies which steps Chef Infra Client will take to bring the node into the desired state.
description, direction, enabled, firewall_action, interface_type, local_address, local_port, profile, program, protocol, remote_address, remote_port, rule_name, and service are the properties available to this resource.

Actions¶

The windows_firewall_rule resource has the following actions:

:create: Create a Windows firewall entry.
:delete: Delete an existing Windows firewall entry.
:nothing: This resource block does not act unless notified by another resource to take action. Once notified, this resource block either runs immediately or is queued up to run at the end of a Chef Infra Client run.

Properties¶

The windows_firewall_rule resource has the following properties:

description

Ruby Type: String | Default Value: "Firewall rule"

The description to assign to the firewall rule.

direction

Ruby Type: Symbol, String | Default Value: :inbound

The direction of the firewall rule. Direction means either inbound or outbound traffic.

enabled

Ruby Type: true, false | Default Value: true

Whether or not to enable the firewall rule.

firewall_action

Ruby Type: Symbol, String | Default Value: :allow

The action of the firewall rule.

interface_type

Ruby Type: Symbol, String | Default Value: :any

The interface type the firewall rule applies to.

local_address

Ruby Type: String

The local address the firewall rule applies to.

local_port

Ruby Type: String, Integer, Array

The local port the firewall rule applies to.

profile

Ruby Type: Symbol, String, Array | Default Value: :any

The profile the firewall rule applies to.

program

Ruby Type: String

The program the firewall rule applies to.

protocol

Ruby Type: String | Default Value: "TCP"

The protocol the firewall rule applies to.

remote_address

Ruby Type: String

The remote address the firewall rule applies to.

remote_port

Ruby Type: String, Integer, Array

The remote port the firewall rule applies to.

rule_name

Ruby Type: String | Default Value: The resource block's name

An optional property to set the name of the firewall rule to assign if it differs from the resource block’s name.

service

Ruby Type: String

The service the firewall rule applies to.

Common Resource Functionality¶

Chef resources include common properties, notifications, and resource guards.

Common Properties¶

The following properties are common to every resource:

ignore_failure

Ruby Type: true, false | Default Value: false

Continue running a recipe if a resource fails for any reason.

retries

Ruby Type: Integer | Default Value: 0

The number of attempts to catch exceptions and retry the resource.

retry_delay

Ruby Type: Integer | Default Value: 2

The retry delay (in seconds).

sensitive

Ruby Type: true, false | Default Value: false

Ensure that sensitive resource data is not logged by Chef Infra Client.

Notifications¶

notifies

Ruby Type: Symbol, ‘Chef::Resource[String]’

A resource may notify another resource to take action when its state changes. Specify a 'resource[name]', the :action that resource should take, and then the :timer for that action. A resource may notify more than one resource; use a notifies statement for each resource to be notified.

A timer specifies the point during a Chef Infra Client run at which a notification is run. The following timers are available:

:before: Specifies that the action on a notified resource should be run before processing the resource block in which the notification is located.
:delayed: Default. Specifies that a notification should be queued up, and then executed at the end of a Chef Infra Client run.
:immediate, :immediately: Specifies that a notification should be run immediately, per resource notified.

The syntax for notifies is:

notifies :action, 'resource[name]', :timer

subscribes: Ruby Type: Symbol, ‘Chef::Resource[String]’

A resource may listen to another resource, and then take action if the state of the resource being listened to changes. Specify a 'resource[name]', the :action to be taken, and then the :timer for that action.

Note that subscribes does not apply the specified action to the resource that it listens to - for example:

file '/etc/nginx/ssl/example.crt' do
  mode '0600'
  owner 'root'
end

service 'nginx' do
  subscribes :reload, 'file[/etc/nginx/ssl/example.crt]', :immediately
end

In this case the subscribes property reloads the nginx service whenever its certificate file, located under /etc/nginx/ssl/example.crt, is updated. subscribes does not make any changes to the certificate file itself, it merely listens for a change to the file, and executes the :reload action for its resource (in this example nginx) when a change is detected.

A timer specifies the point during a Chef Infra Client run at which a notification is run. The following timers are available:

:before: Specifies that the action on a notified resource should be run before processing the resource block in which the notification is located.
:delayed: Default. Specifies that a notification should be queued up, and then executed at the end of a Chef Infra Client run.
:immediate, :immediately: Specifies that a notification should be run immediately, per resource notified.

The syntax for subscribes is:

subscribes :action, 'resource[name]', :timer

Guards¶

A guard property can be used to evaluate the state of a node during the execution phase of a Chef Infra Client run. Based on the results of this evaluation, a guard property is then used to tell Chef Infra Client if it should continue executing a resource. A guard property accepts either a string value or a Ruby block value:

A string is executed as a shell command. If the command returns 0, the guard is applied. If the command returns any other value, then the guard property is not applied. String guards in a powershell_script run Windows PowerShell commands and may return true in addition to 0.
A block is executed as Ruby code that must return either true or false. If the block returns true, the guard property is applied. If the block returns false, the guard property is not applied.

A guard property is useful for ensuring that a resource is idempotent by allowing that resource to test for the desired state as it is being executed, and then if the desired state is present, for Chef Infra Client to do nothing.

Properties

The following properties can be used to define a guard that is evaluated during the execution phase of a Chef Infra Client run:

not_if: Prevent a resource from executing when the condition returns true.
only_if: Allow a resource to execute only if the condition returns true.

Examples¶

The following examples demonstrate various approaches for using resources in recipes:

Allowing port 80 access

windows_firewall_rule 'IIS' do
  local_port '80'
  protocol 'TCP'
  firewall_action :allow
end

Blocking WinRM over HTTP on a particular IP

windows_firewall_rule 'Disable WinRM over HTTP' do
  local_port '5985'
  protocol 'TCP'
  firewall_action :block
  local_address '192.168.1.1'
end

Deleting an existing rule

windows_firewall_rule 'Remove the SSH rule' do
  rule_name 'ssh'
  action :delete
end