Querying directly a nameserver works, while forwarding not

[Daniele Imbrogino]

Hi all.

I just installed BIND9 via 'apt-get install' and for the moment I just want
to use it as cache-server.
The only thing I've edited is the forwarders section on the options
statement in '/etc/bind/named.conf.options', adding as forwarders 10.0.2.3,
a working nameserver on my private network.

I restarted BIND9 and then I tried, for example, 'dig www.apple.com'
obtaining "connection timed out; no servers could be reached".
But if I try 'dig @10.0.2.3 www.apple.com' it works correctly and I obtain
the correct answer.

Why? How can I resolve this problem?
Thank you.
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