The feedback type pdns enable command enables the data feedback function for Passive DNS (PDNS) information.
The undo feedback type pdns enable command disables the data feedback function for PDNS information..
By default, the data feedback function for PDNS information is disabled.
After this function is enabled, the device collects statistics on DNS resolution records, and summarizes and sends the statistics to the feedback server for constructing a PDNS library, which helps detect DNS information and improve the malicious domain name detection capability.
The passive DNS information can be fed back only when the security service that processes DNS traffic, such as intrusion prevention and DNS filtering, is enabled on the FW.
You can run the feedback interval command to set the interval for feeding back.