CentOS 7.x Disabling IPv6 lookups in bind

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CentOS 7.x Disabling IPv6 lookups in bind

To disable IPv6 lookups in bind use following steps:

1. Edit '/etc/named.conf' and set

   filter-aaaa-on-v4 yes;

2. Disable bind from listening on IPv6 interfaces by commenting following

   #listen-on-v6 port 53 { ::1; };

   in /etc/named.conf file

3. Edit /etc/sysconfig/named and set

   OPTIONS="-4"

   In case you use vim to edit the file, then do not worry about red coloring of the file

4. Finally restart bind by using:

   systemctl restart named

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