use become

handlers/main.yml

@@ -1,5 +1,5 @@
 ---
-- name: restart iptables
+- name: Restart iptables
   shell: sleep 2 && systemctl restart iptables
   async: 1
   poll: 0

tasks/config.yml

@@ -1,4 +1,6 @@
 ---
+- name: Setup iptables
+  block:
   - name: Set custom iptables rules
     iptables_raw:
       name: 'iptables_custom_rules_{{ item.name }}'
@@ -28,3 +30,4 @@
       state: '{{ (iptables_default_tail != "" ) | ternary("present", "absent") }}'
       rules: '{{ iptables_default_tail }}'
     tags: iptables
+  become: True

tasks/install.yml

@@ -1,7 +1,9 @@
 ---
-- name: Install package
+- name: Install iptables
+  block:
+  - name: Install packages
     package:
-    name: '{{ iptables_package }}'
+      name: "{{ iptables_package }}"
       state: latest
 
   - name: Enable and start service
@@ -9,3 +11,4 @@
       name: iptables
       enabled: True
       state: started
+  become: True