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win_firewall (1) Versions 1.1.0

Provides resources for configuring the firewall in Windows

Berkshelf
Policyfile
Knife
cookbook 'win_firewall', '~> 1.1.0'
cookbook 'win_firewall', '~> 1.1.0', :supermarket
knife supermarket install win_firewall
knife supermarket download win_firewall
README
Dependencies
Changelog
Quality 50%

Windows Firewall Cookbook

Maintainer: OIT Systems Engineering (ua-oit-se@alaska.edu)

Purpose

The custom resources in this cookbook implement the mechanism for configuring the firewall in Windows. For an example of a policy for how to configure the firewall, see the se-win-baseline cookbook.

Requirements

Chef

This cookbook requires Chef 13+

Platforms

Supported Platform Families:

  • Windows

Platforms validated via Test Kitchen:

  • Windows Server 2016
  • Windows Server 2012
  • Windows Server 2008R2
  • Windows 10

Notes:

  • This is a low-level cookbook with precondition that Powershell 5.0 is installed
    • Custom resources will not work with previous versions of Powershell
    • Windows 2008 and 2012 require WMF update to install Powershell 5.0
    • Powershell is not installed by this cookbook

Resources

This cookbook provides four resources for managing the firewall in Windows. See Netsh AdvFirewall for details on configuring the Windows firewall.

firewall

A firewall provides actions to manage the entire firewall, as when managing all rules with a single action. A firewall also internally manages script caches and all resources multiplexed to the firewall, such as whitelists. No default action is provided so that all actions must be explicitly specified. See the whitelist attributes below for details on modifying internal state.

Actions

Five actions are provided. These actions are associated with only attributes that were previously multiplexed to the named firewall. For example, deleting existing rules will only respect whitelists that were assigned to the current firewall. All disable and delete actions will skip managed rules and respect both the rule whitelist, node['win_firewall']['firewall_to_whitelist_groups'], and the group whitelist, node['win_firewall']['firewall_to_whitelist_rules'], of the associated firewall.

  • create - Post condition is that the named firewall exists and all resources are initialized. A firewall must be created before any associated firewall_rule or firewall_rule_state is created.
  • log_scripts - Post condition is that all cached scripts are written to the log_file.
  • disable_external_rules - Post condition is that all rules that are not managed by this firewall are disabled.
  • delete_external_rules - Post condition is that all rules that are not managed by this firewall are deleted.
  • delete_external_disabled_rules - Post condition is that all rules that are both not managed by this firewall and are disabled are deleted.

Attributes

This resource has two attributes.

  • name - The name_property of the resource that acts as a persistent identifier between resources. Used to multiplex rules, states, whitelists, and logs. It is strongly recommended that most users utilize a single firewall within a cookbook as this minimizes complexity.
  • log_file - Defaults to 'C:/chef/log/win_firewall.log'. The location of the log file, where the scripts than were run can be found.

firewall_rule

This resource is used to create or modify a single firewall rule and effectively describes the state of this rule.

Actions

This resource provides a single action.

  • create_synchronize - Post condition is that the named rule exists and is configured as indicated. Enforces the precondition that the named rule is not externally managed (is part of a system group or is managed by group policy) and will throw an exception if an attempt is made to modify an externally managed rule. Alternatively, use the firewall_rule_state or firewall_rule_group resources to disable or delete an externally managed rule, and then create a new rule.

Attributes

Attributes are provided to describe most fields of a Windows firewall rule. Attribute default values mirror netsh advfirewall default values when a netsh default exists.

  • name - The name_property of the resource. Maps to the name of the firewall rule.
  • firewall_name - Defaults to 'default'. The name of the associated firewall. In the absence of a compelling reason, almost all users should use a single firewall within a cookbook.

The following attributes are required, but have default values

  • direction - Defaults to 'in'. Allowed values are 'any', 'in', and 'out'.
  • firewall_action - Defaults to 'allow'. Allowed values are 'allow', 'block', and 'bypass'.

The following attributes are optional, and have default values that have no effect. Each array must contain the single string 'any' or one or more allowed values.

  • profiles - Defaults to ['any']. Allowed array values are 'domain', 'private', and 'public'.
  • interface_type - Defaults to 'any'. Allowed values are 'wireless', 'lan', 'ras'.
  • local_ips - Defaults to ['any']. Allowed array values are subnets in CIDR notation, e.g. 192.168.1.0/24, or IP ranges separated by '-', e.g. 192.168.1.0-192.168.1.48.
  • local_ports - Defaults to ['any']. Allowed array values are integers.
  • remote_ips - Defaults to ['any']. Allowed array values are subnets in CIDR notation, e.g. 192.168.1.0/24, or IP ranges separated by '-', e.g. 192.168.1.0-192.168.1.48.
  • remote_ports - Defaults to ['any']. Allowed array values are integers.
  • protocol - Defaults to 'any'. Allowed values are 'icmpv4', 'icmpv6', 'tcp', and 'udp'.
  • service - Defaults to 'any'. The short name of a service.
  • enabled - Defaults to 'yes'. Allowed values are 'yes' and 'no'.

These attributes are optional, and have no reasonable non-trivial default value.

  • description - Defaults to ''. A description of what the rule does.
  • program - Defaults to ''. The path to an executable program.

A few corollaries of the definition above:

  • Stateful rules are currently not supported
  • Authentication is currently not supported

If any of these features are needed, please contact OIT Systems Engineering (ua-oit-se@alaska.edu) or submit a pull request.

firewall_rule_state

This resource provides actions to modify the status of matching firewall rules. To modify the settings of a single rule, the firewall_rule resource can be used.

There are two modes for how the rule name is used 1. The name is used to find an exact match to the name of a single existing rule 2. The name is a regex that will be used to match names of existing rules

When regex matching is used, all actions will skip managed rules and respect the rule whitelist, node['win_firewall']['firewall_to_whitelist_groups'], of the associated firewall but not the group whitelist, node['win_firewall']['firewall_to_whitelist_rules'].

Actions

Three actions are provided. If exact name matching is used, all actions except delete enforce the precondition that the named rule exists and will throw an exception otherwise.

  • enable - Post condition is that the named rule is enabled.
  • disable - Post condition is that the named rule is disabled.
  • delete - Post condition is that the named rule does not exist.
  • set_remote_ips - Post condition is that the named rule permits remote IPs corresponding to the ip_list attribute.

Attributes

This resource has three attributes.

  • name - The name_property of the resource that maps to either the name of an existing firewall rule or a regular expression that is used for matching rule names.
  • use_regex - Defaults to 'false'. Boolean flag that determines the matching mode.
  • firewall_name - Defaults to 'default'. The name of the associated firewall. In the absence of a compelling reason, almost all users should use a single firewall within a cookbook.
  • ip_list - Defaults to empty array. The permitted IPs to be assigned to the rule, represented as an array of CIDRs. This attribute is used only by the set_remote_ips action.

firewall_rule_group

This resource manages an entire rule group with a single action. See the firewall_rule_whitelist resource for details on creating whitelists to mask group actions.

Actions

Three actions are provided. Both disable and delete actions will skip managed rules and respect the rule whitelist, node['win_firewall']['firewall_to_whitelist_groups'], of the associated firewall but not the group whitelist, node['win_firewall']['firewall_to_whitelist_rules'].

  • enable - Post condition is that every rule matching the named group is enabled.
  • disable - Post condition is that every rule matching the named group is disabled.
  • delete - Post condition is that no rule matching the named group exists.

Attributes

This resource has a two attributes.

  • name - The name_property of the resource. Maps to the group field of rules within the firewall.
  • firewall_name - Defaults to 'default'. The name of the associated firewall. In the absence of a compelling reason, almost all users should use a single firewall within a cookbook.

Attributes

All firewall actions and those firewall_rule_state actions that use regular expression matching will respect one or more whitelists.

  • node['win_firewall']['firewall_to_whitelist_groups'] - Defaults to {'default' => ['core networking']}; the default firewall will whitelist the 'Core Networking' group. A hash of firewall name to array of whitelisted rule groups. Pre-existing rules that belong to these groups will not be disabled or deleted by actions on the named firewall.
  • node['win_firewall']['firewall_to_whitelist_rules'] - Defaults to {'default' => []}; the default firewall has no whitelisted rules. A hash of firewall name to array of whitelisted rules. Pre-existing rules with name listed here will not be disabled or deleted by actions on the named firewall.

Recipes

This is a resource-only cookbook; and adding the default recipe to a node's runlist will have no effect.

Examples

firewall_rule 'Inbound Windows Remote Desktop Protocol (RDP) over TCP' do
  description 'Allow inbound Windows Remote Desktop Protocol (RDP) over TCP from only UA address space'
  direction 'in'
  remote_ips ['137.229.0.0/16', '199.165.64.0/18', '10.0.0.0/8', '172.16.0.0/12', '192.168.0.0/16']
  local_ports [3389]
  protocol 'tcp'
  program 'C:\Windows\system32\svchost.exe'
  service 'termservice'
  firewall_action 'allow'
end

firewall_rule_group 'alljoyn router' do
  action :delete
end

['dhcpv6', 'icmpv6', 'iphttps', 'ipv6', 'teredo'].each do |name_regex|
  firewall_rule_state name_regex do
    action :delete
    use_regex true
  end
end

firewall_rule_state 'dhcp' do
  action :set_remote_ips
  use_regex true
  ip_list ['137.229.0.0/16', '199.165.64.0/18', '10.0.0.0/8', '172.16.0.0/12', '192.168.0.0/16']
end

firewall 'default' do
  action :delete_external_rules
end

Development

Development should follow GitHub Flow to foster some shared responsibility.

  • Fork/branch the repository
  • Make changes
  • Fix all Rubocop (rubocop) and Foodcritic (foodcritic .) offenses
  • Write smoke tests that reasonably cover the changes (kitchen verify)
  • Pass all smoke tests
  • Submit a Pull Request using Github
  • Wait for feedback and merge from a second developer

Requirements

For running tests in Test Kitchen a few dependencies must be installed.

  • ChefDK
  • Vagrant
  • VirtualBox
  • Install the dependency tree with berks install
  • Install the Vagrant WinRM plugin: vagrant plugin install vagrant-winrm

Dependent cookbooks

windows >= 0.0.0

Contingent cookbooks

There are no cookbooks that are contingent upon this one.

Changelog for Windows Time Cookbook

1.1.0

  • Upgraded for Chef 14
  • Added support for Windows 2008

1.0.0

  • Initial public release

Collaborator Number Metric
            

1.1.0 failed this metric

Failure: Cookbook has 0 collaborators. A cookbook must have at least 2 collaborators to pass this metric.

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Failure: To pass this metric, your cookbook metadata must include a source url, the source url must be in the form of https://github.com/user/repo, and your repo must contain a CONTRIBUTING.md file

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1.1.0 passed this metric

No Binaries Metric
            

1.1.0 passed this metric

Publish Metric
            

1.1.0 passed this metric

Supported Platforms Metric
            

1.1.0 passed this metric

Testing File Metric
            

1.1.0 failed this metric

Failure: To pass this metric, your cookbook metadata must include a source url, the source url must be in the form of https://github.com/user/repo, and your repo must contain a TESTING.md file

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1.1.0 failed this metric

Failure: To pass this metric, your cookbook metadata must include a source url, the source url must be in the form of https://github.com/user/repo, and your repo must include a tag that matches this cookbook version number