Netopia D3232 User Reference Manual page 67

By matching on a port number, an IP filter can be applied to selected services, such as Telnet, FTP, and World
Wide Web. The tables below show a few common services and their associated port numbers.
Internet service
FTP
Telnet
SMTP (mail)
Gopher
Internet service
Who Is
World Wide Web
SNMP
TFTP
An IP filter can also use a comparison option to evaluate a packet's source or destination port number. The
comparison options are:
No Compare: No comparison of the port number specified in the filter with the packet's port number.
Not Equal To: For the filter to match, the packet's port number cannot equal the port number specified in the
filter.
Less Than: For the filter to match, the packet's port number must be less than the port number specified in the
filter.
Less Than or Equal: For the filter to match, the packet's port number must be less than or equal to the port
number specified in the filter.
Equal: For the filter to match, the packet's port number must equal the port number specified in the filter.
Greater Than: For the filter to match, the packet's port number must be greater than the port number specified
in the filter.
Greater Than or Equal: For the filter to match, the packet's port number must be greater than or equal to the
port number specified in the filter.
TCP port Internet service
20/21 Finger
23 World Wide Web
25 News
70 rlogin
UDP port Internet service
43 AppleTalk Routing
Maintenance (at-rtmp)
80 AppleTalk Name Binding
(at-nbp)
161 AURP (AppleTalk)
69 who
Security 8-67
TCP port
79
80
144
513
UDP port
202
202
387
513