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If you need to make a large number of DNS requests, you can install bind in caching mode on your server to make those requests run more quickly. <pre>sudo yum install -y caching-nameserver chkconfig named on service named start</pre> Then test with this command: <pre>host -v cnn.com localhost</pre> Assuming it works, edit /etc/resolv.conf and add this line at the top: <pre>nameserver 127.0.0.1</pre>

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