In default there is no log is generated for powerdns, we need to configure log for it if we need it. So open your powerdns configuration file

vim /etc/pdns/pdns.conf

Add the below value to enable logging facility

logging-facility=0

Now restart your service

service pdns restart

Now you can get the log for powerdns in your /var/log/messages file use the below command to grep it out all pdns log

cat /var/log/messages | grep pdns

ih thank you i did all eith your instruction and every thing is good ))