NAT Port Forwarding Filters Routing Firewall RIP PPP ADSL ATM VCC Filters Filters are used to allow or deny LAN or WAN users from accessing the Internet or internal Network.   Outbound Filter   Inbound Filter    IP Outbound Filter Filters are used to allow or deny LAN users from accessing the Internet. Source IP ~ Single IPIP range Any IP Destination IP ~ Single IPIP range Any IP Source Port ~ Single PortPort Range Any PortSafe Ports Destination Port ~ Single PortPort Range Any PortSafe Ports Protocol AllTCP UDPICMP Action AllowDeny Outbound Filter List # Source IP Destination IP Source Port Destination Port Prot. Act.   1 Any IP Any IP Any Port Any Port All Allow 2 Any IP Any IP Any Port 53 UDP Allow 3 Any IP Any IP Any Port 53 TCP Allow 4 Any IP Any IP Any Port 25 TCP Allow 5 Any IP Any IP Any Port 110 TCP Allow 6 Any IP Any IP Any Port 21 TCP Allow 7 Any IP Any IP Any Port 80 TCP Allow 8 Any IP Any IP Any Port 23 TCP Allow 9 Any IP Any IP Any Port Any Port ICMP Allow 10 Any IP Any IP Any Port 23 TCP Deny 11 Any IP Any IP Any Port 53 UDP Deny 12 Any IP Any IP Any Port 53 TCP Deny 13 Any IP Any IP Any Port 21 TCP Deny 14 Any IP Any IP Any Port 23 TCP Deny 15 Any IP Any IP Any Port Any Port ICMP Deny 16 Any IP Any IP Any Port 23 TCP Deny 17 Any IP Any IP Any Port Any Port All Allow