I'm having a difficulty in the configurations of the bind, my server has two addresses for dns, only one is working the reverse, but both are configured the same way. And the other problem is that I had to put in resolv.conf with the addresses of the OpenDNS to work properly, if I leave the address of my server it drips but it takes up to 1 minute to respond. I will assume two fictitious addresses 200.200.200.2 and 200.200.200.4: when I run ping google.com: ping: unknown host google.com named.conf.options: options { directory "/var/cache/bind/"; # directory "/etc/bind/"; allow-query { 127.0.0.0/8; 200.200.200.2; 200.200.200.4; 192.168.1.0/24;}; listen-on { 127.0.0.1; 200.200.200.2; 200.200.200.4;}; forwarders { 200.200.200.2; 200.200.200.4:;}; version "Null"; auth-nxdomain no; # conform to RFC1035 listen-on-v6 { any; }; recursion no; }; seconde reverse zone: $TTL 3600 @ IN SOA ns2.domain.com.br. admin.domain.com.br. ( 2012030909 ; serial, todays date + todays serial # 7200 ; refresh, seconds 540 ; retry, seconds 604800 ; expire, seconds 86400 ) ; minimum, seconds ; NS ns2.domain.com.br. 4 IN PTR ns2.domain.com.br. host 200.200.200.4: Host 4.200.200.200.in-addr.arpa. not found: 3(NXDOMAIN) zone domain.com.br $TTL 3600 @ IN SOA ns1.domain.com.br. admin.domain.com.br. ( 2012042001 ; serial, todays date + todays serial # 7200 ; refresh, seconds 540 ; retry, seconds 604800 ; expire, seconds 86400 ) ; minimum, seconds ; 3600 MX 10 mail.domain.com.br. 3600 MX 10 domain.com.br. 3600 MX 10 www.domain.com.br. ftp 3600 A 200.200.200.2 www 3600 A 200.200.200.2 mail 3600 A 200.200.200.2 smtp 3600 A 200.200.200.2 pop3 3600 A 200.200.200.2 server 86400 A 200.200.200.2 ns1 86400 A 200.200.200.2 ns2 86400 A 200.200.200.4 domain.com.br. 3600 A 200.200.200.2 domain.com.br. 3600 NS ns1.domain.com.br. domain.com.br. 3600 NS ns2.domain.com.br. domain.com.br. 86400 TXT "v=spf1 a mx ptr ~all" Thanks