User Guide

Chapter 7 TunnelGuard SRS Builder 335
Nortel Secure Network Access Switch 4050 User Guide
4 Select another expression that you will use to form a new logical expression
in combination with the first.
5 Using the radio buttons, select the type of expression you wish to construct, in
this example an AND expression.
The AND expression lets you construct a logical expression where both
conditions must be met for the TunnelGuard checks to pass. The OR
expression lets you construct an expression where either of the conditions
must be met for the TunnelGuard checks to pass. The NOT operand lets you
construct an expression where the condition must not be met for the
TunnelGuard checks to pass, for example the file or files in the software
definition must not be found on the client machine.
6 Click the Form TunnelGuard Rule Expression button.
A new expression is created and copied to the Available Expressions area (see
Figure 88 on page 336).