Ansible Role firewall

This role configures a firewall on the system. For the currently supported firewalls, see the options for the firewall__firewall variable below.

Mandatory Requirements

  • When using firewall__firewall == fwbuilder, you either need to manually deploy a Firewall Builder file to /etc/fwb.sh or use the firewall__fwbuilder_repo_url variable to clone the Firewall Builder files automatically.

Optional Requirements

  • When using firewall__firewall == iptables, you can place an iptables config file in your inventory, which will be deployed to the system. The file has to be placed into {{ inventory_dir }}/host_files/{{ inventory_hostname }}/etc/sysconfig/iptables.

Tags

firewall

  • Configures a firewall on the system.

  • Triggers: Stops and masks firewalld.service, fwb.service, iptables.service, nftables.service, ufw.service. Starts and unmasks the firewall which is defined in firewall__firewall.

firewall:deploy_fwb_sh

  • Deploys the /etc/fwb.sh file for Firewall Builder.

  • Triggers: fwb.service restart.

firewall:firewalld

  • Manages firewalld.

  • Triggers: firewalld.service reload.

Optional Role Variables

firewall__firewall

  • Which firewall should be activated and configured. All other firewalls will be disabled. Possible options: 'None', 'firewalld', 'fwbuilder', 'iptables', 'nftables', 'ufw'.

  • Type: String.

  • Default: 'fwbuilder'

firewall__firewalld_ports__group_var / firewall__firewalld_ports__host_var

  • List of dictionaries defining the FirewallD ports.

  • Type: List of dictionaries.

  • Default: []

  • Subkeys:

    • port:

      • Mandatory. Port or port range.

      • Type: String.

    • state:

      • Optional. State of the port. Either enabled or disabled.

      • Type: String.

      • Default: 'enabled'

firewall__firewalld_services__group_var / firewall__firewalld_services__host_var

  • List of dictionaries defining the FirewallD services.

  • Type: List of dictionaries.

  • Default: []

  • Subkeys:

    • service:

      • Mandatory. Name of the service.

      • Type: String.

    • state:

      • Optional. State of the service. Either enabled or disabled.

      • Type: String.

      • Default: 'enabled'

firewall__fwbuilder_fw_file

  • The name of the Firewall Builder file which will be created when compiling the firewall in Firewall Builder. Needed if firewall__fwbuilder_repo_url is used and if the Firewall name within Firewall Builder differs from {{ inventory_hostname }}.

  • Type: String.

  • Default: '{{ inventory_hostname }}'

firewall__fwbuilder_repo_url

  • The GIT repository URL to clone the compiled firewall files from.

  • Type: String.

  • Default: unset

Example:

# optional
firewall__firewall: 'fwbuilder'
firewall__firewalld_ports__group_var: []
firewall__firewalld_ports__host_var:
  - port: '1234/tcp'
    state: 'enabled'
firewall__firewalld_services__group_var: []
firewall__firewalld_services__host_var:
  - service: 'ssh'
    state: 'enabled'
firewall__fwbuilder_fw_file: 'example.fw'
firewall__fwbuilder_repo_url: 'git@git.example.com:fwbuilder/fwb.git'

License

The Unlicense

Author Information

Linuxfabrik GmbH, Zurich