Hi, dig <three-octets>.in-addr.arpa. AXFR outputs "Transfer failed." I've already checked "netstat -anp." Looks OK. dig <my-domain> works. sudo named-checkzone <my-domain> /etc/bind/db.<my-domain> outputs "OK." sudo named-checkzone <three-octets>.in-addr.arpa. /etc/bind/db.<first-octet> outputs "OK" too. What should I check? Cheers