Motorola 3347 - Manual (Page 19)

19
Security
The Motorola Netopia® Gateway tracks which local hosts are communicating with which
remote hosts. It routes packets received from remote networks to the correct computer
on the LAN (Ethernet) inter face.
• When NAT is OFF, a Motorola Netopia® Gateway acts as a traditional TCP/IP router, all
LAN computers/devices are exposed to the Internet.
A diagram of a typical NAT-enabled LAN follows:
☛
NOTE:
1. The default setting for NAT is ON.
2. Motorola uses Por t Address Translation (PAT) to implement the NAT facility.
3. NAT Pinhole traffic (discussed below) is always initiated from the WAN side.
WAN
Interface
LAN
Ethernet
Interface
Motorola Netopia® Gateway
NAT
Internet
Embedded Admin Services:
HTTP-Web Server and Telnet Server Port
NAT-protected
LAN stations
Ethernet