Motorola 3347 - Manual (Page 20)

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Motorola Netopia® Advanced Features for NAT
Using the NAT facility provides effective LAN security. However, there are user applications
that require methods to selectively by-pass this security function for cer tain types of Inter-
net traffic.
Motorola Netopia® Gateways provide special gaming and other ser vice configuration tools
that enable you to establish NAT-protected LAN layouts that still provide flexible by-pass
capabilities.
Some of these rules require coordination with the unit’s embedded administration ser-
vices: the internal Web (HTTP) Por t (TCP 80) and the internal Telnet Ser ver Por t (TCP 23).
Internal Servers
The internal ser vers are the embedded Web and Telnet ser vers of the Gateway. You would
change the internal ser ver por ts for Web and Telnet of the Gateway if you wanted to have
these ser vices on the LAN using pinholes or the Default ser ver. Pinhole configuration rules
provide an internal por t for warding facility that enables you to eliminate conflicts with
embedded administrative por ts 80 and 23.
Default Server
This feature allows you to:
• Direct your Gateway to for ward all externally initiated IP traffic (TCP and UDP protocols
only) to a default host on the LAN.
• Enable it for cer tain situations:
Where you cannot anticipate what por t number or packet protocol an in-bound applica-
tion might use.
For example, some network games select arbitrar y por t numbers when a connection is
opened.
When you want all unsolicited traffic to go to a specific LAN host.
Combination NAT Bypass Configuration
Specific Games and ser vices and Default Ser ver settings, each directed to different LAN
devices, can be used together.