Motorola Netopia 2200 Series User Manual page 21

Security
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WARNING:
NAT Bypass configuration allows inbound access to the specified LAN station.
Contact your Network Administrator for LAN security questions.
IP-Passthrough
The Netopia Gateway now offers an IP passthrough feature. The IP passthrough feature
allows a single PC on the LAN to have the Gateway's public address assigned to it. It also
provides PAT (NAPT) via the same public IP address for all other hosts on the private LAN
subnet.
VPN IPSec Pass Through
This Motorola Netopia® service supports your independent VPN client software in a trans-
parent manner. Motorola has implemented an Application Layer Gateway (ALG) to support
multiple PCs running IP Security protocols.
This feature has three elements:
On power up or reset, the address mapping function (NAT) of the Gateway's WAN con-
1.
figuration is turned on by default.
When you use your third-party VPN application, the Gateway recognizes the traffic
2.
from your client and your unit. It allows the packets to pass through the NAT "protec-
tion layer" via the encrypted IPSec tunnel.
The encrypted IPSec tunnel is established "through" the Gateway.
3.
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