diff --git a/services/viso.libre-service.eu.md b/services/viso.libre-service.eu.md
index 3fb8de2..36e676a 100644
--- a/services/viso.libre-service.eu.md
+++ b/services/viso.libre-service.eu.md
@@ -33,7 +33,12 @@ systemctl reload apache2.service
 
 ## Firewall
 
-TODO
+Ouverture de ports spécifiques :
+```
+iptables -A OUTPUT -o $WAN  -p udp  --dport 10000 -j ACCEPT
+iptables -A OUTPUT -o $WAN  -p udp  --dport 3478 -j ACCEPT
+iptables -A OUTPUT -o $WAN  -p tcp  --dport 5349 -j ACCEPT
+```
 
 ## Hostname
 Généraliser le FQDN :