DNS resolver queries available to specific network

[Souza Simbota]

Hello,

Am running BIND9 on Debian machine as a caching nameserver. Is there a way
to only allow specific hosts or network to send/receive DNS resolve queries
to my server? I have noticed some old clients who are still sending DNS
queries to my server and I want to block them by allowing only
hosts/networks from my network. 

Regards,

SOUZA

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