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I have a Server 2008 Domain Server [DC Controller] named “example.org” the same as my public internet domain www.example.org

When my domain users in “example.org” type the internet address, www.example.org, they cannot get to the public domain website. Instead, they see a message that "the page cannot be displayed". This only happens on the Windows 7 Machines on the domain, not the Windows Xp machines.

Is there anything I'm doing wrong that is causing this? Or do I need to rename my domain “example.org” so it has no correlation to www.example.org?

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Do name resolution for mycompany.org on one of the affected box's and compare the result to one done from a external box. –  Pratik Amin Nov 10 '11 at 16:24
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This is why you follow best practices and never name your AD the same as a production web-facing domain. –  MDMarra Nov 11 '11 at 20:26
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"mycompany.org" currently points to a domain squatter, but it could also be much worse. In the future, please use the "example" name instead, which is reserved for this purpose. –  Joel Coel Nov 14 '11 at 21:30
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2 Answers

You definitely have a DNS resolution error.

To resolve:

  1. Open a command prompt.
  2. nslookup
  3. server 8.8.8.8
  4. www.example.org
  5. Write down the value returned.
  6. Open the DNS management console.
  7. Select your domain.
  8. Create a new A record with the name 'www' and the IP listed at step 5.

EDIT - I hope this doesn't come across as patronizing.. Not my intent. It did sound like you were wanting a detailed solution.

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There are three separate things to look at here.

The first (DNS resolution for www on the local intranet) is well-covered by another answer, with the addition that if you host your own web site at the same location as all of your domain users, you'll want to use the internal ip address rather than the public ip address.

The second is the Windows 7 vs Windows XP issue. Here, you want to look in DNS settings for your network adapters. I'm not sure what your network setup is like, so I'll just give you a generic idea of what the screen looks like (below). The main thing is that it's likely your Windows XP machines have something a little different here than your Windows 7 machines. You're looking at the options in the middle of this Window:

dns settings

Finally, you may want to also support allowing your users to enter example.org in addition to www.example.org to reach your web site. You can do this, but to make it happen you have to run iis on your domain controller. There are some good reasons you may not want to do that. But if you decide to go head, you just need to set the default page for iis on your domain controller do a permanent redirect to the actual (www) web server.

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