diff --git a/scripts/install.sh b/scripts/install.sh
index 4c86999..0afb353 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -113,8 +113,17 @@ if [ -f "/etc/iptables/rules.v4" ]; then
 
     if [[ "${MISTBORN_IPTABLES_ACTION}" =~ ^([cC])$ ]]; then
     # clear
+        echo "Clearing existing iptables rules..."
         sudo rm -rf /etc/iptables/rules.v4
+        sudo iptables -F
+        sudo iptables -t nat -F
+        sudo iptables -P INPUT ACCEPT
+        sudo iptables -P FORWARD ACCEPT
         sudo rm -rf /etc/iptables/rules.v6 || true
+        sudo ip6tables -F || true
+        sudo ip6tables -t nat -F || true
+        sudo ip6tables -P INPUT ACCEPT || true
+        sudo ip6tables -P FORWARD ACCEPT || true
 
     elif [[ "${MISTBORN_IPTABLES_ACTION}" =~ ^([aA])$ ]]; then
     # do nothing