Update to 2021-12-01 19:13

roles/iptables/defaults/main.yml

@@ -0,0 +1,42 @@
+---
+
+# Should iptables be managed
+iptables_manage: yes
+
+# Default rules
+iptables_default_head: |
+  -P INPUT DROP
+  -P FORWARD DROP
+  -P OUTPUT ACCEPT
+  -N LOGDENY
+  -A LOGDENY -m limit --limit 10/s -j LOG --log-prefix 'Firewall: '
+  -A LOGDENY -j REJECT
+  -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
+  -A INPUT -m state --state INVALID -j DROP
+  -A INPUT -i lo -j ACCEPT
+  -A INPUT -m state --state NEW -p tcp --dport 22 -s {{ trusted_ip | default(['0.0.0.0/0']) | join(',') }} -j ACCEPT
+  -A INPUT -p icmp --icmp-type echo-request -j ACCEPT
+  -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
+  -A FORWARD -m state --state INVALID -j DROP
+
+iptables_default_tail: |
+  -A INPUT -j LOGDENY
+  -A FORWARD -j LOGDENY
+
+iptables_custom_rules: []
+# Example:
+# iptables_custom_rules:
+#   - name: open_port_12345 # 'iptables_custom_rules_' will be prepended to this
+#     rules: "-A INPUT -p tcp --dport 12345 -j ACCEPT"
+#     state: present
+#     weight: 40
+#     ipversion: 4
+#     table: filter
+#
+# NOTE: 'name', 'rules' and 'state' are required, others are optional.
+
+# By default this role deletes all iptables rules which are not managed by Ansible.
+# Set this to 'yes', if you want the role to keep unmanaged rules.
+iptables_keep_unmanaged: no
+
+...

roles/iptables/tasks/install_Debian.yml

@@ -0,0 +1,16 @@
+---
+
+- name: Install packages
+  apt: name=iptables-persistent
+  tags: firewall
+
+- name: Use iptables-legacy
+  alternatives:
+    name: "{{ item.key }}"
+    path: "{{ item.value }}"
+  with_dict:
+    iptables: /usr/sbin/iptables-legacy
+    ip6tables: /usr/sbin/ip6tables-legacy
+  when: ansible_distribution_major_version | int >= 10
+  tags: firewall
+

roles/iptables/tasks/install_RedHat.yml

@@ -0,0 +1,10 @@
+---
+
+- name: Remove firewalld
+  yum: name=firewalld state=absent
+  tags: firewall
+
+- name: Install packages
+  yum: name=iptables-services
+  tags: firewall
+

roles/iptables/tasks/main.yml

@@ -0,0 +1,36 @@
+---
+
+- include: install_{{ ansible_os_family }}.yml
+
+- name: Set custom iptables rules
+  iptables_raw:
+    name: "iptables_custom_rules_{{ item.name }}"
+    rules: "{{ item.rules }}"
+    state: "{{ item.state | default('present') }}"
+    weight: "{{ item.weight | default(omit) }}"
+    table: "{{ item.table | default(omit) }}"
+  loop: "{{ iptables_custom_rules }}"
+  tags: firewall
+
+- name: Set default iptables head rules
+  iptables_raw:
+    name: iptables_default_head
+    weight: 10
+    keep_unmanaged: "{{ iptables_keep_unmanaged }}"
+    state: present
+    rules: "{{ iptables_default_head }}"
+  tags: firewall,ssh
+
+- name: Set default iptables tail rules
+  iptables_raw:
+    name: iptables_default_tail
+    weight: 99
+    keep_unmanaged: "{{ iptables_keep_unmanaged }}"
+    state: "{{ (iptables_default_tail != '' ) | ternary('present', 'absent') }}"
+    rules: "{{ iptables_default_tail }}"
+  tags: firewall
+
+- name: Enable iptable service
+  service: name=iptables state=started enabled=yes
+  when: ansible_os_family == 'RedHat'
+  tags: firewall