[ml] configurazione filtri Zyxel 650R

Ciao a tutti dovrrei riuscire  aconfigurare il router in modo che i pc 
all'interno della lan non possano accedere a server FTP di internet, sapete 
dirmio come fare?
io ho provato questa configurazione ma con esisto negativo :(

[code]
Filter #: 7,1
                    Filter Type= TCP/IP Filter Rule
                    Active= Yes
                    IP Protocol= 6     IP Source Route= No
                    Destination: IP Addr= 0.0.0.0
                                 IP Mask= 0.0.0.0
                                 Port #= 21
                                 Port # Comp= Equal
                         Source: IP Addr= 0.0.0.0
                                 IP Mask= 0.0.0.0
                                 Port #=
                                 Port # Comp= None
                    TCP Estab= No
                    More= No           Log= None
                    Action Matched= Drop
                    Action Not Matched= Drop

[/code]
ip protocol 6 =tcp, 17 udp, 1 icmp

Grazie Ciao
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