Visualware / BCS / Support / Troubleshooting / Windows DNS

Windows DNS Troubleshooting

Change your DNS settings to resolve router-level blocking of the BCS.

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Why do I need to change my DNS? Your router is currently blocking the BCS from working properly. This is a security feature that some routers have turned on by default. By changing your DNS settings to use Google's servers instead of your router's, you're asking a different "phone book" to look up the address the BCS needs — one that will allow our testing tool to work correctly.
1

Open Network Connections

Press Windows key + R on your keyboard.

Type ncpa.cpl and press Enter.

A window called "Network Connections" will open.

2

Find Your Active Network Connection

Look for the network adapter that shows "Connected" or has a green checkmark. This is usually named:

Ethernet if using a cable

Wi-Fi if using wireless

3

Open Network Properties

Right-click on your active network connection.

Click Properties.

4

Change IPv4 DNS Settings

In the list, find and click on Internet Protocol Version 4 (TCP/IPv4).

Click the Properties button.

Select Use the following DNS server addresses.

Enter the Google DNS servers:

Field Address
Preferred DNS server8.8.8.8
Alternate DNS server8.8.4.4

Click OK.

5

Change IPv6 DNS Settings (If Applicable)

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Back in the Properties window, check if Internet Protocol Version 6 (TCP/IPv6) is ticked. If it is not, skip this step.

Click on Internet Protocol Version 6 (TCP/IPv6), then click Properties.

Select Use the following DNS server addresses.

Enter the Google IPv6 DNS servers:

Field Address
Preferred DNS server2001:4860:4860::8888
Alternate DNS server2001:4860:4860::8844

Click OK, then OK again to close the main Properties window.

6

Clear Your DNS Cache

Press Windows key + R.

Type cmd and press Enter.

In the command prompt window, type:

ipconfig /flushdns

Press Enter. You should see Successfully flushed the DNS Resolver Cache.

7

Test the Change

In the same command prompt window, run:

nslookup bcs.visualware.com

You should now see Google's DNS servers (such as 8.8.8.8) listed instead of your router's address.

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You're Done!

Close all windows and try the testing tool again. Your computer will now use Google's DNS servers instead of your router's, which should allow the BCS to work properly.

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Still having problems? Contact us and provide screenshots of the steps taken above. For help taking screenshots on Windows using the Snipping Tool, click here.