i think i have found the configuration but to test
i need to put it on Lan port 1 of swisscom centro business, activate the ip passtrough
and put an wan ip address like
1.6 Connexion de l’hôte sur le port LAN 1 et configuration
Fermez maintenant votre hôte (firewall) sur le port LAN 1 du routeur Centro
Business. Configurez la connexion WAN de votre hôte. Saisissez 172.31.255.6
pour l’adresse IP de l’hôte, 255.255.255.252 pour le sous-réseau et indiquez
comme Gateway l’adresse 172.31.255.5. Effectuez maintenant la configuration
LAN de votre pare-feu
1.6host connection with the por LAN 1 and configuration…
close now your host (firewall) on the port LAN1 of the Centro Business router.
Cofigure the conection WAN of your host. Put 172.31.255.6 for host IP Address, 255.255.255.252 for the sub-net mask and put as gateway the address 172.31.255.5.
You can configure now the LAN INTO YOUR FIREWALL…