Nortel Networks 4050 Manual Do Utilizador

Chapter 7 TunnelGuard SRS Builder 351

Nortel Secure Network Access Switch 4050 User Guide

 

In the Available Expressions area, select the desired expression and click the 
Delete Expression button.

TunnelGuard can interact with other software vendor applications. In addition to 
its own checks, TunnelGuard can be configured to communicate with other 
applications and ask for their status. The result of the status check is treated the 
same as other checks and is reported back to the server. This capability allows 
administrators to use TunnelGuard to retrieve status from other software 
packages, such as personal firewalls and virus checkers, to make sure they are 
running properly.

TunnelGuard requires a Windows Platform DLL that implements at least one 
common entry point as described below. 

#include <windows.h>

/*  return values */

#define STATUS_SUCCESS 0

#define STATUS _FAILURE  -1

#define STATUS_REQUIRES_UPDATE 1

/* simple check */

int WINAPI CheckStatus(void);

This API blocks until one of the required status, as mentioned above, is returned 
in 10 seconds or less. If an answer is not returned in a timely manner, it is assumed 
the software is unavailable, and the call times out and returns an error message.

Note: You cannot delete an expression that is used in a TunnelGuard 
rule.