User's Guide

3e-531AP Wireless Access Point
Chapter 4: Gateway Con guration
29000125-001 C
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IP Filtering
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-
ci c IP Address.
Port Filtering
Port  ltering permits you to con gure the Gateway to block outbound
traf c on speci c ports. It can be used to block the wireless network from
using speci 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 Of ce Protocol for
email receiving.)