ZyXEL Communications P-128IMH, User Manual, Page: 137 / 191

Prestige 128IMH ISDN Modem/ Router/Hub
Filter Configuration 10-9
The following table describes how to configure your TCP/IP filter rule.
Table 10-6 TCP/IP Filter Rule Menu Fields
Field Description Option
Active This field activates/deactivates the filter rule. Yes/No
IP Protocol Protocol refers to the upper layer protocol, e.g., TCP is 6,
UDP is 17 and ICMP is 1. This value must be between 0
and 255 0-255
IP Source Route If Yes, the rule applies to packet with IP source route
option; else the packet must not have source route option.
The majority of IP packets do not have source route. Yes/No
Destination: IP
Addr Enter the destination IP Address of the packet you wish to
filter. This field is a don’t-care if it is 0.0.0.0. IP address
Destination: IP
Mask Enter the IP subnet mask to apply to the Destination: IP
Addr. Subnet mask
Destination: Port # Enter the destination port of the packets that you wish to
filter. The range of this field is 0 to 65535. This field is a
don’t-care if it is 0. 0-65535
Destination: Port #
Comp Select the comparison to apply to the destination port in
the packet against the value given in Destination: Port #. None/Less/Greater/
Equal/Not Equal]
Source: IP Addr Enter the source IP Address of the packet you wish to
filter. This field is a don’t-care if it is 0.0.0.0. IP Address
Source: IP Mask Enter the IP subnet mask to apply to the Source: IP Addr. IP Mask
Source: Port # Enter the source port of the packets that you wish to filter.
The range of this field is 0 to 65535. This field is a don’t-
care if it is 0. 0-65535
Source: Port #
Comp Select the comparison to apply to the source port in the
packet against the value given in Source: Port #. Yes/No
TCP Estab This field is applicable only when IP Protocol field is 6,
TCP. If yes, the rule matches only established TCP
connections; else the rule matches all TCP packets. Yes/No
More If yes, a matching packet is passed to the next filter rule
before an action is taken; else the packet is disposed of
according the action fields. Yes / N/A