Netopia 6.3 - Manual (Page 46)

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Section 4 Configure
Link IP Static ARP
Link Pinholes
Response
Description
Your Gateway maintains a dynamic Address Resolution Protocol (ARP)
table to map IP addresses to Ethernet (MAC) addresses. It populates this
ARP table dynamically, by retrieving IP address/MAC address pairs only
when it needs them. Optionally, you can define static ARP entries to
map IP addresses to their corresponding Ethernet MAC addresses.
Unlike dynamic ARP table entries, static ARP table entries do not time
out. The IP address cannot be 0.0.0.0. The Ethernet MAC address entry
is in nn-nn-nn-nn-nn-nn (hexadecimal) format.
Response
Description
Pinholes allow you to transparently route selected types of network traf-
fic, such as FTP requests or HTTP (Web) connections, to a specific host
behind the Gateway. Creating a pinhole allows access traffic originating
from a remote connection (WAN) to be sent to the internal computer
(LAN) that is specified in the Pinhole page.
Contact your Network Administrator for LAN security questions.
Pinholes are common for applications like multiplayer online games.
Refer to software manufacturer application documentation for specific
traffic types and port numbers.