diff --git a/tasks/install.yml b/tasks/install.yml
index 478ac0f..b75575d 100644
--- a/tasks/install.yml
+++ b/tasks/install.yml
@@ -51,6 +51,12 @@
   notify:
     - mosquitto_restart
 
+- name: Open port for mttq
+  iptables_raw:
+    name: allow_mttq_port
+    state: present
+    rules: '-A OUTPUT -m state --state NEW -p tcp --dport {{ mosquitto_port }} -j ACCEPT'
+
 - name: Copy systemd unit files
   template:
     src: "etc/systemd/system/mosquitto.service.j2"