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Configure DNS

Last Modified: 2012-05-12
My company have one internal DNS and one external DNS server in the DMZ.  Recently we were having problem connecting to one of the external websites.  After updating some settings, we are able to connection to the site on our external DNS server.  However, on our internal DNS server, we can only connect to the site if we enter xxxxxx.com without the www.  If we browse using www.xxxxxx.com, then we can't connect to the site.

Using NSLOOKUP, xxxxxx.com returns the correct IP address, and www.xxxxxx.com does not on the internal DNS server.

Any ideas how I can fix the problem?  Thanks.
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