CentOS 7.x Disabling IPv6 lookups in bind

To disable IPv6 lookups in bind use following steps:

Edit '/etc/named.conf' and set
```
filter-aaaa-on-v4 yes;
```
Disable bind from listening on IPv6 interfaces by commenting following
```
#listen-on-v6 port 53 { ::1; };
```
in /etc/named.conf file
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
Finally restart bind by using:
```
systemctl restart named
```

Anonymous