ansible_role_nftables

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ansible-role-nftables

This role configures the Linux netfilter through nftables commandline interface.

Description

With the configuration of netfilter with nftables you will have a good tool to secure your servers on the network. This role will disable and remove firewalld and ufw. Because they are not compatible with netfilter.

In the default configuration, this role will create one table with three chains: input, output, forward. For each of those chains you can configure rulesets`.

Input chain

The input chain by default:

  • drops any non-matching packets
  • configures connection tracking by accepting all packets which a established or related
  • accepts traffic to interace lo (localhost)

Output chain

The output chain by default:

  • accepts all packets

Forward chain

The forward chain by default:

  • drops all packes

Role Variables

Name Default Description
nftables_default_configuration true If true configures the input chain as descript, connection tracking and accept on lo interface
nftables_config_input_policy drop Default policy for the input chain.
nftables_config_input_rules [tcp dport 22 counter accept] Rule which allows by default SSH from any address.
nftables_config_forward_policy drop Default policy for the forward chain.
nftables_config_forward_rules [] Empty ruleset for forward chain.
nftables_config_output_policy accept Default policy for the output chain.
nftables_config_output_rules [] Empty ruleset for output chain.

Role Tags

Name Description
nftables_all Tag to run all tasks.
nftables_install Tag which installs the nftables package
nftables_configure Tag which triggers the configuration steps of this role.
nftables_disable_foreign_firewalls Tag to disable foreign firewalls like firewalld or ufw.

Dependencies

None

Example Playbook

- name: All
  hosts: all
  debugger: on_failed
  roles:
    - role: ansible-role-nftables
      vars:
        nftables_config_input_rules:
          - tcp dport 22 counter accept
          - ip saddr 1.1.1.1 dport 80,443 counter accept

License

MIT License

Contributors

Daniel von Essen

About

This role configures the Linux netfilter with nftables commandline interface.

role filrewalling filter iptables netfilter nft nftables security system
Install
ansible-galaxy install dvonessen/ansible-role-nftables
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