Workaround to a Trusty (sic!) bug.

tasks/plain-iptables.yml

@@ -56,6 +56,14 @@
     register: restart_related_t
     notify: Restart fail2ban after an iptables restart
     when: install_iptables_rules_trusty is changed
+    ignore_errors: true
+
+  - name: Start the iptables service on Trusty explicitly running the sysv script
+    shell: /etc/init.d/iptables-persistent restart
+    register: restart_related_t
+    notify: Restart fail2ban after an iptables restart
+    when: install_iptables_rules_trusty is changed
+    ignore_errors: true
 
   - name: Start the iptables service immediately after the new rules have been installed, on Debian 7. This can have an impact on other tasks
     service: name=iptables-persistent state=restarted enabled=yes