Reference Guide for the Model RT328 and Model RH348 ISDN Routers
Filter Configuration 8-5
Table 8-4. TCP/IP Filter Rule Menu Fields
Field Descriptions
Active In this field, you can make the filter rule active (Yes) or make the filter rule inactive (No).
IP Protocol Protocol refers to the IP-specific number of the protocol. The range for the value
entered in this field should be between 0 and 255 (for example, 6 refers to the TCP
protocol).
IP Source Route Yes or No in this field determines whether to check the source route.
Destination:
IP Addr In this field, enter the destination IP address of the packet you want to filter. The
address is usually written in dotted-decimal notation such as a.b.c.d where a, b, c, and
d are numbers between 0 and 255.
IP Mask In this field, enter the IP subnet mask that will be used to mask the bits of the
IP address given in Destination: IP Addr. Refer to Chapter 1, “Introduction,” for more
information.
Port # In this field, enter the destination port of the packets that you want to filter. The range of
this field is 0 to 65535.
Port # Comp In this field, select the comparison quantifier you want to enable to compare to the value
given in Destination: Port #. There are five options for this field:
• None (default)
• Less
• Greater
• Equal
• Not Equal
Source:
IP Addr In this field, enter the source IP address of the packet you want to filter. The IP address
is usually written in dotted-decimal notation such as a.b.c.d where a, b, c, and d are
numbers between 0 and 255.
IP Mask In this field, enter the IP subnet mask that is used to mask the bits of the IP Address
given in Source: IP Addr. See “Netmask” on page 1-9 for information about IP subnet
masks.
Port # In this field, enter the source por t of the packets that you want to filter. The range of this
field is 0 to 65535.
Filter.fm Page 5 Tuesday, October 10, 2000 3:25 PM