diff --git a/firewall.rc b/firewall.rc
index d81866e..09a9103 100644
--- a/firewall.rc
+++ b/firewall.rc
@@ -80,17 +80,17 @@ NTPOK='0.0.0.0/0'
 # Allow HTTP/HTTPS/SMTP traffic
 /sbin/ip6tables -A INPUT -i $INT -p tcp --sport 80 --match state --state ESTABLISHED,RELATED -j ACCEPT
 /sbin/ip6tables -A INPUT -i $INT -p tcp --sport 443 --match state --state ESTABLISHED,RELATED -j ACCEPT
-/sbin/ip6tables -A INPUT -i eth0 -p tcp --sport 25 --match state --state ESTABLISHED,RELATED -j ACCEPT
+/sbin/ip6tables -A INPUT -i $INT -p tcp --sport 25 --match state --state ESTABLISHED,RELATED -j ACCEPT
 
 # Allow DNS, NTP and traceroute traffic
-/sbin/ip6tables -A OUTPUT -p udp --dport 53 --match state --state NEW -j ACCEPT
-/sbin/ip6tables -A OUTPUT -p udp --dport 123 --match state --state NEW -j ACCEPT
-/sbin/ip6tables -A OUTPUT -p udp --dport 33434:33523 --match state --state NEW -j ACCEPT
+/sbin/ip6tables -A OUTPUT -o $INT -p udp --dport 53 --match state --state NEW -j ACCEPT
+/sbin/ip6tables -A OUTPUT -o $INT -p udp --dport 123 --match state --state NEW -j ACCEPT
+/sbin/ip6tables -A OUTPUT -o $INT -p udp --dport 33434:33523 --match state --state NEW -j ACCEPT
 
 ################### IPv4 Specific rules
 # /sbin/iptables ...
 
 # Allow DNS, NTP and traceroute traffic
-/sbin/iptables -A OUTPUT -p udp --dport 53 --match state --state NEW -j ACCEPT
-/sbin/iptables -A OUTPUT -p udp --dport 123 --match state --state NEW -j ACCEPT
-/sbin/iptables -A OUTPUT -p udp --dport 33434:33523 --match state --state NEW -j ACCEPT
+/sbin/iptables -A OUTPUT -o $INT -p udp --dport 53 --match state --state NEW -j ACCEPT
+/sbin/iptables -A OUTPUT -o $INT -p udp --dport 123 --match state --state NEW -j ACCEPT
+/sbin/iptables -A OUTPUT -o $INT -p udp --dport 33434:33523 --match state --state NEW -j ACCEPT
diff --git a/minifirewall b/minifirewall
index 4420080..1f41c11 100755
--- a/minifirewall
+++ b/minifirewall
@@ -298,7 +298,9 @@ $IPT -P INPUT DROP
 # par defaut tout peut sortir sauf l'UDP (sinon voir OUTPUTDROP)
 $IPT -P OUTPUT ACCEPT
 [ $IPV6 != 'off' ] && $IPT6 -P OUTPUT ACCEPT
+$IPT -A OUTPUT -p udp --match state --state ESTABLISHED,RELATED -j ACCEPT
 $IPT -A OUTPUT -p udp -j DROP
+[ $IPV6 != 'off' ] && $IPT6 -A OUTPUT -p udp --match state --state ESTABLISHED,RELATED -j ACCEPT
 [ $IPV6 != 'off' ] && $IPT6 -A OUTPUT -p udp -j DROP
 
 trap - INT TERM EXIT