ZyXEL Communications ZyWALL OTPv2 Support Notes page 64

(6) Server status:
How to determine if a port is active?

For Windows, use the "netstat –an" command, then search the output manually for active ports.
Server(s) not responding

Use the configuration utility to check the server status as below:

Restart server(s).
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– ZyWALL OTPv2 Support Notes
64