Hello,

I think bind does not have such filtering available (see below).

logging {
   [ channel channel_name {
     ( file path name
         [ versions ( number | unlimited ) ]
         [ size size_spec ]
       | syslog syslog_facility
       | stderr
       | null );
     [ severity (critical | error | warning | notice |
                 info | debug [ level ] | dynamic ); ]
     [ print-category yes | no; ]
     [ print-severity yes | no; ]
     [ print-time yes | no; ]
   }; ]
   [ category category_name {
     channel_name ; [ channel_name ; ... ]
   }; ]
   ...
};

However, you can achive this by following.

1, You can redirect dns logs to syslog and on syslog you can apply such filtering to log only A records.

2, You can run tcpdump continue to print only A records and redirect output to file (this would be good if you are running this for sort time)

Thanks,

Rupesh Patel