Advanced configuration
17
Filter
In this part of the Intranet Setting menu, the IP Address Filter prevents
up to 5 local network clients from accessing certain services on the Internet
via the PalmRouter Elite. The specific types of Internet services to be filtered
are based on the TCP port numbers which these services use for communica-
tion.
Some well-known TCP port numbers are listed below:
Port number
Service name
21
FTP
23
Telnet
25
SMTP
53
DNS
70
Gopher
80
HTTP
110
POP3
161
SNMP
Up to 5 TCP ports can be specified on the Filtered Private Ports setting.
