Doro IP500PBXW, Руководство пользователя

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Administration Manual ip500pbxw – English
110
Security Trigger
A security trigger can be defined for applications that are not supported by the ALGs listed above. A security trigger allows
the firewall to dynamically open and close secondary ports associated with a particular application and to specify the
maximum length of time the port remains open.
Select ‘Security Trigger Configuration …’
The following screen is displayed
Current security triggers are displayed. There is an option to delete each entry.
Select ‘
New Trigger
’
The following screen is displayed
Enter the following parameters
Transport Type Adds a trigger for a TCP or UDP application
Port Number Start Sets the start of the trigger port range for the control
session
Port Number End Sets the end of the trigger port range for the control session
Secondary Port Number
Start Sets the start port range that the trigger will open
Secondary Port Number
End Sets the end of the port range that the trigger will open
Allow Multiple Hosts Allow or Block sets whether or not a secondary session can
be initiated to/from different remote hosts or the same
remote host on an existing trigger
Max Activity Interval The max interval time in milliseconds between the use of
the secondary port sessions. If a secondary port opened by
a trigger has not been used for the specified time, it is
closed