Unable to connect to internet after installing Active Directory and DNS

djmounce553
djmounce553 used Ask the Experts™
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After following the directions in this video: http://www.archy.net/2008/12/13/setup-a-new-active-directory-forest-with-windows-2008/ to a T, I restarted and was unable to access the internet. It shows that I am connected to the network mydomain.local, but that it is not connected to the internet. Any suggestions? If you need any more information, please let me know and I will provide it.
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Chris DentPowerShell Developer
Top Expert 2010

Commented:

Kind of reluctant to watch the video :)

Did you configure Forwarders at all? Or are you using Root Hints (which is the default)?

It's worth checking networking, can you reach your default gateway? And is DNS traffic allowed to flow from your server to the outside world (don't forget the Windows Firewall there).

Chris
check your nic settings. most likly your dns server is set to 127.0.0.1

you will need to put a dns server or forwarder in on your dns server to forward external requests.

~regards

Author

Commented:
Before I ran DCPromo, I was able to access the internet just fine. During the install, I was required to change the connection settings to a static IP. I then chose the DNS server to point to itself. If I try to set up Forwarders, it complains that it can't validate them. And if I go the Root Hints route, it can't seem to resolve them. The computer I'm attempting to set up would be the first DC in a new forest. And as for the video, I'd probably get my account banned if it were a virus.
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PowerShell Developer
Top Expert 2010
Commented:

I don't doubt the authenticity of the video, it's just Friday night and not very motivated to watch (posting on here is fine though) :-D

So that implies network connectivity rather than a failing in DNS.

Default Gateway is set on your network adapter? If so, can you reach it? Ping / Tracert?

Chris
remmett70Network Manager

Commented:
Before you ran DCPROMO where were you getting DNS from?  You state that you had to assign static at the time when you promoted the server.  Where was the server getting its dynamic address?
on your server, open your dns mgmt console.

right click on the DNS SERVER not a zone and select properties.

Goto the forwarders tab and enter the ISP's DNS servers they gave you for your internet connection.

you will need  to stop/start the DNS server

then just to be safe run

ipconfig flushdns

test a couple nslookup's

nslookup
>google.com
Non-authoritative answer:
Name:    google.com
Addresses:  74.125.127.100, 74.125.45.100, 74.125.67.100

you will need to do the forwarders regardless.

all clients that point to this new DNS server are going to look to it first to resolve, i dont recommend configuring clients with external name servers... have the lookups come through your dns server

Chris DentPowerShell Developer
Top Expert 2010

Commented:

Forwarders are optional configuration. If Forwarders are not configured Root Hints are used. Both methods will allow a DNS server to resolve public names, lack of either will not cause the failures described (failure to validate either forwarders or root hints).

Chris

Author

Commented:
Chris-Dent was right. And wow do I feel dumb. I went with a standard default gateway address, but didn't bother to check that mine matched. I just did an ipconfig and corrected the Default Gateway, and now it works. Thanks!

Author

Commented:
Thanks!
Chris DentPowerShell Developer
Top Expert 2010

Commented:

These things happen to everyone at some point, at least it was fixed before the weekend :) Have a good one :)

Chris

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