How To Flush DNS Cache

DNS (Domain Naming System) is a system of naming web sites that allows your computer to understand addresses for web sites you visit such as:

  • Valdosta State University's address is http://www.valdosta.edu.
  • Microsoft's address is http://www.microsoft.com.
  • Google's address is http://www.google.com.

As you visit web sites, these names get stored on your computer so you can access them faster in the future. However, there are cases in which abad copy of a name will get saved on your computer. When you attempt to visit the web site, you will encounter connection errors.

In relation to accounts and services offered by Valdosta State University, bad copies of stored names can often cause issues when attempting to access Hallnet (the campus wireless network) or BlazeVIEW (the university's online course system). However, you can clear out these stored names using the steps in our guides below. Please bear in mind that the steps will vary based on your operating system. Thus, please choose the operating system you are running on your computer from the list below:

Table of Contents

Windows XP

Click the Start button on the bottom left corner of your desktop.

Then, click the Run... button.

Choose Run from the Start Menu

Type cmd into the Open field.

Then, click the OK button.

Type cmd in Box

Type ipconfig/flushdns and press the Enter key on your keyboard.

ipconfig/flushdns

If successful, you should see a message saying Successfully flushed the DNS Resolver Cache.

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Windows Vista / Windows 7

Click the Start button on the bottom left corner of your desktop.

In the Search Bar, type cmd and wait for the icon to appear in the window above.

Type cmd in the Start Menu

Right-click the cmd icon.

Then, left-click the Run as administrator button in the pop-up menu that appears.

Run as Administrator

Click the Continue button if a User Account Control window opens.

Click Continue

Type ipconfig/flushdns and press the Enter key on your keyboard.

ipconfig/flushdns

If successful, you should see a message saying Successfully flushed the DNS Resolver Cache.

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Mac OS X

Open the Terminal application.

Open Terminal

Type dscacheutil -flushcache into the Terminal window.

Then, press the Enter key.

dscacheutil -flushcache

Note: You will not receive confirmation message if this process is successful. Instead, you will only receive an error message if the command was typed incorrectly.

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Congratulations! You have successfully flushed the DNS cache.

If you encounter technical issues following these steps, please contact the Information Technology Helpdesk at 229-245-4357 or send an e-mail to Helpdesk. Please note that our work request system can only accept emails sent from a VSU email address.