Ansible Role: iptables

Description

Installs and configures iptables.

Installation

ansible-galaxy install sbaerlocher.iptables

Requirements

This role requires Ansible 2 or higher.

Role Variables

Name	Default	Description
iptables_filter_input_policy	drop	IPv4 default filter input policy
iptables_filter_forward_policy	drop	IPv4 default filter forward policy
iptables_filter_output_policy	accept	IPv4 default filter output policy
iptables_filter_rules	[{protocol: tcp, source_address: 0.0.0.0/0, destination_port: 22, comment: OpenSSH, target: accept }]	Array of filter rules represented as hashes
iptables_nat_prerouting_policy	accept	IPv4 default nat prerouting policy
iptables_nat_input_policy	accept	IPv4 default nat input policy
iptables_nat_output_policy	accept	IPv4 default nat output policy
iptables_nat_postrouting_policy	accept	IPv4 default nat postrouting policy
iptables_nat_rules	[]	Array of nat rules represented as hashes
ip6tables_filter_rules	[]	Array of filter rules represented as hashes
ip6tables_filter_input_policy	drop	IPv6 default filter input policy
ip6tables_filter_forward_policy	drop	IPv6 default filter forward policy
ip6tables_filter_output_policy	accept	IPv6 default filter output policy
ip6tables_nat_prerouting_policy	accept	IPv6 default nat prerouting policy
ip6tables_nat_input_policy	accept	IPv6 default nat input policy
ip6tables_nat_output_policy	accept	IPv6 default nat output policy
ip6tables_nat_postrouting_policy	accept	IPv6 default nat postrouting policy

Dependencies

None

Example Playbook

- hosts: all
  roles:
     - sbaerlocher.iptables

Install and configure iptables to disallow ICMP, allow OpenSSH and HTTP

- hosts: all
  vars:
    iptables_filter_rules:
      - chain: input
        protocol: tcp
        source_address: 0.0.0.0/0
        destination_port: 22
        comment: OpenSSH
        target: accept
      - chain: input
        protocol: tcp
        source_address: 0.0.0.0/0
        destination_port: 80
        comment: HTTP
        target: accept
  roles:
    - sbaerlocher.iptables

Install and configure iptables with a port forward rule for HTTP

- hosts: all
  vars:
    iptables_filter_rules:
      - chain: input
        protocol: tcp
        source_address: 0.0.0.0/0
        destination_port: 80
        comment: HTTP
        target: accept
    iptables_nat_rules:
      - chain: prerouting
        protocol: tcp
        destination_port: 80
        target: dnat
        to_destination: 192.168.88.88
        to_port: 8080
  roles:
    - sbaerlocher.iptables

Changelog

2.4

• add default value for ipv6
• fix problem with ipv6

2.3

• add support for ipv6

2.2

• fix problems with ubuntu

2.1

• fix problems with centos

2.0

• new strucktur
• new tests

1.0

• Initial release

Author

• Simon Bärlocher

License

This project is under the MIT License. See the LICENSE file for the full license text.

Copyright

(c) 2018, Simon Bärlocher