First off, did my above recommendation solve your forwarding issue?To disable IPv6 named lookups you need to edit the /etc/sysconfig/named file.Add the below to /etc/sysconf... [by moonpup]
I'm encountering very strange issue with my DNS server, which is set up to forward requests for a specific domain to another DNS server. After restarting named I'm able to resolve hostnames, but after some time forwarding stops working. Another restart helps. I've tried versions 9.8.2 and 9.10 - it works the same.