diff --git a/gestion/gen_confs/firewall.py b/gestion/gen_confs/firewall.py
index 6ab43dd7..ccad453a 100755
--- a/gestion/gen_confs/firewall.py
+++ b/gestion/gen_confs/firewall.py
@@ -466,7 +466,7 @@ class firewall_komaz(firewall_crans) :
         iptables("-t nat -A PREROUTING -s %s -j ACCEPT" % self.zone_serveur )
         iptables("-t nat -A PREROUTING -d %s -j ACCEPT" % self.zone_serveur )
         iptables("-t nat -A PREROUTING -i %s -p tcp --dport 80 -s ! %s -j DNAT --to-destination 138.231.136.3:80" % (self.eth_int, self.zone_serveur) )
-        iptables("-t nat -A POSTROUTING -o %s -p tcp --dport 80 -s ! %s -d 138.231.136.3 -j SNAT --to-source 138.231.136.4" % (self.eth_int, self.zone_serveur) )
+        iptables("-t nat -A POSTROUTING -o %s -p tcp --dport 80 -s 138.231.136.0/21 -d 138.231.136.3 -j SNAT --to-source 138.231.136.4" % self.eth_int )
         iptables("-t nat -A PREROUTING -j TEST_MAC-IP")
         iptables("-t nat -P PREROUTING DROP")
         iptables("-t nat -P OUTPUT ACCEPT")