diff --git a/nixos/hosts/osaka-linode-01/firewall.nix b/nixos/hosts/osaka-linode-01/firewall.nix
index f48ec797..f6777609 100644
--- a/nixos/hosts/osaka-linode-01/firewall.nix
+++ b/nixos/hosts/osaka-linode-01/firewall.nix
@@ -22,7 +22,10 @@
   ];
 
   networking.firewall.extraCommands     = '' 
-    iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
+    iptables -F
+    iptables -t nat -F
+    iptables -X
+    # iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
 
     iptables -t nat -A PREROUTING -p tcp --dport 25 -j DNAT --to-destination 10.100.0.2:25
     iptables -t nat -A POSTROUTING -p tcp -d 10.100.0.2 --dport 25 -j SNAT --to-source 172.234.84.222