diff --git a/group_vars/vagrant.yml b/group_vars/vagrant.yml
index d7d1ac0..d4f80ca 100644
--- a/group_vars/vagrant.yml
+++ b/group_vars/vagrant.yml
@@ -1,10 +1,14 @@
 ansible_user: vagrant
 firewall_disable_ufw: true
-firewall_flush_rules_and_chains: true
+firewall_flush_rules_and_chains: false
+firewall_additional_rules:
+  - "iptables -P INPUT DENY"
 firewall_allowed_tcp_ports:
- - "22"
- - "80"
- - "443"
+  - "22"
+  - "80"
+  - "443"
+  # Jitsi
+  - "4443"
 firewall_allowed_udp_ports:
   # Jitsi
   - "10000"