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ZephyrMFlag for United States of America

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DNS not resolving certain domain and also slow load times

I have ran into a few problems. The first started happening Friday afternoon last week and that issue is that it taking 5-6 minutes for a user to login to their local computer after typing in their password. The user is logging into a server 2008 r2 setup with active directory / dns / dhcp. This is happening on every local user/machine that logs into the server. Once they get in, network shares / network printers work fine.

I have double checked dns settings. Local ip set for dns servers, 2 isp dns servers are set on the router.

Also, I am having issues with our domain.com not loading correctly on the same machines. Sometimes it will load fine but then reboot and it just times out on this specific domain. I have an A record setup in DNS and pointing to the webserver ip as the domain name is also the same domain on server (I know it shouldn't be this way but was already setup).

This issues started happening when our webhost upgraded us to cpanel and we had an issue with one page not loading for people due to a .htaccess file. That was resolved and host said ok, just flushdns and the pages should start loading. I do that and it works for a while, then the next day it would be back to the same issues of timing out on the domain.com. This has been going on for over a week now as I gave it time for DNS to hopefully update through everything. I have power cycled the router but that didn't seem to do anything.

Any ideas? Thanks!
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bas2754
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Ok a little update. It does look like the webhost had changed the IP (twice actually with cpanel upgrade. I had the first change on the server but not the second.

As far as the other issue with slow loading times. It does appear to be a DNS issue. If I enter our local server that handles dns 192.168.0.2 on the local machine network adapter boot up times after typing user password is normal. If I remove the 192.168.0.2 from the adapter it goes back to be very slow.

To answer your previous questions. Local domain is the as external domain that loads our website. I know that is the incorrect way of having it setup but right now there is no going back. To get around that issue and our website loading for users locally, I setup a new A record setup.

DNS settings on the server are 192.168.0.2 and then forwarders setup to both of our ISP dns addresses.

I will dig into the log files shortly.
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So, with your internal and public domain being the same, it is not a problem to have a record for "www.yourdomain.com" pointing to the external IP, but you should not have a record for "yourdomain.com" pointing at an external IP.  You should only have A records for "yourdomain.com" which point at your domain controllers - any others and you will have problems.  This is just confirmation of what bas2754 already mentioned.
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DHCP did have the ISP dns before the internal one so that is what was causing that issue. Thanks