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The IP Filtering page will block certain IPs on the Private LAN from 

ac cess ing your Internet connection. It restricts clients to those with a spe-

cifi c IP Address.

Port fi ltering permits you to confi gure the Gateway to block outbound 

traffi c on specifi c ports. It can be used to block the wireless network from 

using specifi c protocols on the network. 

Following is a list of well known TCP and UDP ports.

Port Range

Protocol

20-21

FTP

23

Telnet

25

SMTP (Simple Mail Transfer 

for email sending)

80

HTTP (World Wide Web)

110

POP3 (Post Offi ce Protocol for 

email receiving.)