BIND 9, disable recursion

Hi,

I am trying to disable the recursion on DNS server (Solaris 10). I have added the lines in the named.conf as below:

 allow-query-cache { none; };
        recursion no;

Then restarted the solaris DNS services

svcadm refresh svc:/network/dns/server:default

Still I am able to nslookup on external sites.

Are these the right steps to do it??

Thanks.