# named.conf
# для более делаьной информации о трансферах расскомментируйте "severity info"
logging {
         channel default_log {
                file "/var/log/dns.log";
#               severity info;
                severity notice;
                print-time yes;
                print-category yes;
                print-severity yes;

         };
         channel more_log {
                file "/var/log/dns_more.log";
        #       severity info;
                severity notice;
                print-time yes;
                print-category yes;
                print-severity yes;
         };
         category queries { default_log;};
         category xfer-in { default_log; };
         category xfer-out { default_log; };
         category security { more_log; };
         category resolver { more_log; };
         category client { more_log; };
         category unmatched { more_log; };
         category default { more_log; };
         category database { more_log; };
};

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Обсуждается: http://www.opennet.ru/tips/info/745.shtml