diff --git a/tuto3.yml b/tuto3.yml
index 7ec53d9..e77833b 100644
--- a/tuto3.yml
+++ b/tuto3.yml
@@ -324,6 +324,17 @@ files:
     source: pkg/nsd/sshd_config
     mode: "0644"
 
+  - path: /usr/bin/reset-router-firewall
+    contents: |
+      #!/bin/sh
+      PS=$(pgrep systemd | head -1)
+      nsenter -t "${PS}" -a iptables -F
+      nsenter -t "${PS}" -a iptables -P INPUT ACCEPT
+      nsenter -t "${PS}" -a iptables -P FORWARD ACCEPT
+      nsenter -t "${PS}" -a iptables -P OUTPUT ACCEPT
+      nsenter -t "${PS}" -a iptables -t nat -F
+    mode: "0755"
+
   - path: /initdb/init-ttrss.sh
     contents: |
       #!/bin/sh