Unable to Map a Network Drive

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Hello Experts,

I have a Windows 2008 Server configured as domain control.

It has two ip addressess, 192.168.1.25 and 10.1.30.140.

I can map a network drive to 192.168.1.25,  but I can't map a network drive to 10.1.30.140.

I'm certain it's a simple problem, but I can't figure out why I can't map a drive to 10.1.30.140.

Any thoughts will be greatly appreciated.

Cheers
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Lee W, MVPTechnology and Business Process Advisor
Most Valuable Expert 2013

Commented:
You have a multi-homed DC.  That's one problem.

Check your firewall settings.

What errors are given by the client(s)?  Are there errors in the event log?  Why is the machine multi-homed?

Author

Commented:
Hi Lee,

As you can see from the image I can map a drive to 192.168.1.25 but I can't map a drive to 10.1.30.140
access
Zaheer IqbalTechnical Assurance & Implementation

Commented:
Do you want 10.1.30.140 as the main IP to map your drive ? or the 192 address ?
what is the reason for having 2 IP addresses ?
I think you may need to change the network connection nic binding order.

https://technet.microsoft.com/en-us/library/cc732472(v=ws.10).aspx

Author

Commented:
Hi Zaheer,

Yes, I would like the 10.1.30.140 as the main ip to map to my drive.

The address 192.168.1.25 is just used to connect to the Server via RDP.

Cheers

Author

Commented:
Hi Zaheer,

I have placed Local Connetion 2 - ip address 10.1.30.140 at the top, but still no luck. Do I need to reboot server?
access
Zaheer IqbalTechnical Assurance & Implementation

Commented:
Yes please restart.

Author

Commented:
Restarted, but no luck :-(
Zaheer IqbalTechnical Assurance & Implementation

Commented:
ok sorry I missed that this is a DC. Which ip address was the first one to setup when you first joined it to the domain ?
What happens when you try hostname ?

Author

Commented:
When I ping the host name n30-dc I get the response 10.1.30.140.

Which makes it even more puzzling why I can't map to 10.1.30.140
Zaheer IqbalTechnical Assurance & Implementation

Commented:
Is the windows firewall on ?

Author

Commented:
Windows firewall is turned off
Zaheer IqbalTechnical Assurance & Implementation

Commented:
what happens if you try and map via \\hostname\ then ?
was the share created on which IP address ? when both ip addresses were configured.

Author

Commented:
I get same result as when I map IP address 10.1.30.140 - unable to map
Zaheer IqbalTechnical Assurance & Implementation

Commented:
can you map the drive on the domain controller itself ?
Can you try to do ipconfig /flushdns on client and test.

Author

Commented:
Yes, I can map the drive on the controller itself - which makes this problem even more strange
Zaheer IqbalTechnical Assurance & Implementation

Commented:
ok another test can you enable disable the network cards, as in disable the 192.168 nic and see if that works?

Author

Commented:
Zacheer

I tried disabling 192.168.1.25 before coming to EE, but no luck.

Interestingly, I can ping 10.1.30.140 and when I do nslookup I see 10.1.30.140
Zaheer IqbalTechnical Assurance & Implementation

Commented:
ok just had another thought under TCP/IP  setting DNS tab do not allow 192.168 address to register to DNS.

What was the primary IP of the DC when you added it as a domain controller ?
Distinguished Expert 2017
Commented:
Look on the server whether 445 is listened to on the 10 IP.

Multi-homed is not your only issue, the two are on two separate network means the server has two default gateways?

It seems that the error is a result of the response coming from the 192 IP because it has a higher preference, lower metric value if you check netstat -rn on the server.

If you capture the response to ping, you might see it coming from the 192.168 ip.

Author

Commented:
Do not allow 192.168 address to register to DNS.

How do I do that?

Author

Commented:
That did it. Thanks
Zaheer IqbalTechnical Assurance & Implementation

Commented:
What was the fix ?

Author

Commented:
My apologies,

Zaheer provided the correct answer with the following link:


https://support.microsoft.com/en-us/help/2023004/steps-to-avoid-registering-unwanted-nic-s-in-dns-on-a-mulithomed-domain

Thanks Zaheer
Distinguished Expert 2017

Commented:
Report your question, and request to have it reopened.

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