The default value for TCP idle time on NetDefend Firewalls now is 262,000 seconds.

The reason for this is because some organizations require to backup their data over Internet connection. If the idle time value is low, the backup process may not be comprehended successfully. For the organizations who do not have this demand, and intend to lower the value setting. Generally, it is recommended that the value as 300 - 600 seconds is enough.

Note: If your network environment is session demanding. The default high TCP idle time may potentially lead to the possibility of port bind failure. In this circumstance, lower the TCP idle time is a good tip to improve your network performance and quality.