Motorola SBG940 - Manual (Page 23)

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Configuration: Basic Gateway TCP/IP Wireless USB
SBG940 User Guide 15
Port Forwarding
The SBG940 opens logical data ports when a computer on its LAN sends data, such as e-mail messages or web
data, to the Internet. A logical data port is different from a physical port, such as an Ethernet port. Data from a
protocol must go through certain data ports.
Some applications, such as games and videoconferencing, require multiple data ports. If you enable NAT, this can
cause problems because NAT assumes that data sent through one port will return to the same port. You may need
to configure port forwarding to run applications with special requirements.
To configure port forwarding, you must specify an inbound (source) port or range of ports. The inbound port opens
only when data is sent to the inbound port and closes again after a specified time elapses with no data sent to it.
You can configure up to 32 port forwarding entries using the
Gateway > PORT FORWARDING — config Page .
Virtual Private Networks
The SBG940 supports multiple tunnel VPN pass-through operation to securely connect remote computers over
the Internet. The SBG940:
• Is compatible with Point to Point Tunneling Protocol ( PPTP ) and Layer 2 Tunneling Protocol ( L2TP )
• Is fully interoperable with any IPSec client or gateway and ANX certified IPSec stacks
Related Documentation
The SBG940 Quick Installation Guide also provides information about using the SBG940.
For information about and documentation for Motorola home-networking products, visit the Motorola Home
Networking page
http://broadband.motorola.com/consumers/home_networking.asp .