Why does service interruption occur on some applications after the NAT or firewall function is configured on an AR router

The default timeout duration value of the session table may be smaller than the timeout duration of corresponding application (for example, voice service). As a result, the session table has timed out and aged before the application times out, and application packets transmitted after the session table has timed out are discarded. Run the firewall-nat session aging-time command to prolong the TCP/UDP timeout duration.

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