As a general rule, the firewall is configured to allow free access to public services offered and restrict other services to a group of trusted IP addresses or private networks if the client is connected through a private network Virtual (VPN).
Kama kanuni ya jumla, firewall kimeundwa kuruhusu bure upatikanaji wa huduma za umma zinazotolewa na kuzuia huduma nyingine kwa kundi la anwani ya IP au kuaminiwa mitandao binafsi kama mteja ni kushikamana kupitia mtandao binafsi Virtual (VPN).