Remote Access Router User's Guide

DI-1162 Remote Access Router
Configuration and Management 71
•
Name – this is a 12 character (maximum), alphanumeric, user-
defined name, used to identify the filter.
• Direction – this defines the direction of the packet relative to the
Interface
parameter below.
•
State – this is used to define the routing decision applied to the
packet. The three routing decisions are described:
1.
forward –
this allows the routing of the packet, if it has met
the criteria of the corresponding filter.
2.
drop
–
this drops (doesn’t allow routing for) a specific packet
that has met the criteria of the corresponding filter.
3.
disable
–
this does not apply the IP filter.
• Interface – this applies the filter to a specific interface, LAN or
one of the three WANs.
•
Protocol Type – this is a protocol identifier, as assigned by the
Internet Assigned Numbers Authority (IANA). The values of this
identifier are described in RFC-1700. This router supports the
following:
4.
protocol type
= 1, this is Internet Control Message (ICMP),
defined in RFC 792.
5.
protocol type
= 6, this is Transmission Control (TCP), defined
in RFC 793.
6.
protocol type
= 17, this is User Datagram (UDP), defined in
RFC 798.
• Src IP – this is the source address in the IP header of this packet.
• Src Netmask – this mask is bit-wise AND’d with the source IP
address, and compared to the IP address of the incoming interface,
for which the packet arrived.