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Two-Armed Configuration 39

Interfaces

During the initial setup procedure (see “Configuration at Boot Up” (page

41)), you will be asked if you want to set up a one-armed configuration or

a two-armed configuration.

One-Armed Conﬁguration

In a one-armed configuration, only one interface is configured. It acts as

both a public interface (facing the Internet) and a private interface (facing

the intranet).

The interface (Interface 1) on the SSL VPN will handle public traffic, that

is, client traffic from and to the Internet, as well as private traffic, that is,

connecting the SSL VPN to internal resources and configuring the SSL

VPN from a management station.

Figure 1

One-Armed Configuration without Application Switch

Two-Armed Conﬁguration

In a two-armed configuration, two separate interfaces are configured on

the VPN Gateway.

Interface 1 will handle private traffic (between the SSL VPN and the

trusted intranet), that is, connecting the SSL VPN to internal resources and

configuring the SSL VPN from a management station.

Interface 2 will handle public traffic, that is, client traffic from and to the

Internet.

A two-armed configuration is considered more secure.

Nortel VPN Gateway

User Guide

NN46120-104 02.01 Standard

14 April 2008

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