Disabling IPv6 lookups in bind

<yambe:breadcrumb>Bind_DNS_server_configuration|Bind DNS</yambe:breadcrumb>

Disabling IPv6 lookups in bind

Just disabling bind to listen on IPv6 addresses does not prevents it from querying for IPv6 addresses to remote hosts. To ensure that IPv6 is completely disabled use:

1. Edit /etc/sysconfig/named and set

   OPTIONS="-4"

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

   filter-aaaa-on-v4 yes;

   Also optionally comment 'listen-on-v6 port 53 { ::1; };'

3. Finally use 'service named restart'

Some of this has been learned from https://kb.isc.org/article/AA-00576/0/Filter-AAAA-option-in-BIND-9-.html