added disabling of ipv6

common.yml

@@ -151,13 +151,22 @@
         group: root
         mode: '0644'
 
-# Set vm.swappiness to 5 in /etc/sysctl.conf
-    - sysctl:
+    # Set vm.swappiness to 5 in /etc/sysctl.conf
+    - name: "Set swappiness to zero in sysctl.conf"
+      sysctl:
         name: vm.swappiness
         value: '0'
         state: present
+        reload: yes
         sysctl_file: /etc/sysctl.conf
 
+    - name: Disable IPv6 with sysctl
+      sysctl: name={{ item }} value=1 state=present reload=yes
+      with_items:
+        - net.ipv6.conf.all.disable_ipv6
+        - net.ipv6.conf.default.disable_ipv6
+        - net.ipv6.conf.lo.disable_ipv6
+
 
 - name: "ssh_hardening"
   hosts: localhost