Network address translation (nat) default settings, Network address translation (nat) pinhole settings – Motorola Netopia 3342N User Manual
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Administrator’s Handbook
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Network Address Translation (NAT) Default Settings
NAT default settings let you specify whether you want your Motorola Netopia® Gateway to for ward NAT traf-
fic to a default ser ver when it doesn’t know what else to do with it. The NAT default host function is useful
in situations where you cannot create a specific NAT pinhole for a traffic stream because you cannot antici-
pate what por t number an application might use. For example, some network games select arbitrar y por t
numbers when a connection is being opened. By identifying your computer (or another host on your network)
as a NAT default ser ver, you can specify that NAT traffic that would other wise be discarded by the Motorola
Netopia® Gateway should be directed to a specific hosts.
set nat-default mode [ off | default-server | ip-passthrough ]
Specifies whether you want your Motorola Netopia® Gateway to for ward unsolicited traffic from the WAN to
a default ser ver or an IP passthrough host when it doesn’t know what else to do with it. See
for more information.
set nat-default dhcp-enable [ on | off ]
Allows the IP passthrough host to acquire its IP address via DHCP, if
ip-passthrough is enabled.
set nat-default address
ip_address
Specifies the IP address of the NAT default ser ver.
set nat-default host-hardware-address
MAC_address
}
Specifies the hardware (MAC) address of the IP passthrough host. If the MAC address is specified as all-
zeroes, the first DHCP client that requests an IP address gets the passthrough address.
Network Address Translation (NAT) Pinhole Settings
NAT pinholes let you pass specific types of network traffic through the NAT inter faces on the Motorola Neto-
pia® Gateway. NAT pinholes allow you to route selected types of network traffic, such as FTP requests or
HTTP (Web) connections, to a specific host behind the Motorola Netopia® Gateway transparently.
To set up NAT pinholes, you identify the type(s) of traffic you want to redirect by por t number, and you spec-
ify the internal host to which each specified type of traffic should be directed.
The following list identifies protocol type and por t number for common TCP/IP protocols:
•
FTP (TCP 21)
•
telnet (TCP 23)
•
SMTP (TCP 25),
•
TFTP (UDP 69)
•
SNMP (TCP 161, UDP 161)
set pinhole name
name
Specifies the identifier for the entr y in the router's pinhole table. You can name pinhole table entries
sequentially (1, 2, 3), by por t number (21, 80, 23), by protocol, or by some other naming scheme.