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How to flush DNS?

Networking & Security


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  #1  
Old 04-08-2009
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Join Date: Apr 2008
Posts: 53
How to flush DNS?
  

Hi, How to flush the DNS? I know its used to clear the DNS cache but what is the command for it?

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  #2  
Old 05-08-2009
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Join Date: Dec 2008
Posts: 239
Re: How to flush DNS?

Do the following to Flush the DNS:


Go to Start -> Run -> type ipconfig /flushdns , Press Enter.
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  #3  
Old 05-08-2009
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Join Date: Nov 2008
Posts: 173
Re: How to flush DNS?

What is DNS cache?

Most DNS clients cache the results of name resolution requests. This speeds up name resolution if multiple lookups are done to the same address, such as is common when browsing the web.

Sometimes a bad DNS entry will be cached and you will need to either flush the DNS cache to get rid of it, or wait up to 24 hours for it to be dropped from the cache automatically.
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  #4  
Old 05-08-2009
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Join Date: Dec 2008
Posts: 101
Re: How to flush DNS?

Actually whenever you visit any web site , your pc stores the the website's DNS information in a local cache. Now when you visit the website again, it will first look at this cache for any previous visits. While this is a very efficient method it can cause problems if DNS information has just recently changed. In this case you might want to "flush" your local cache to force your local computer to find this new DNS info.
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  #5  
Old 19-09-2009
danwall
 
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Re: How to flush DNS?

If you have windows vista or windows 7 make sure that you run the command prompt in administrator mode otherwise the command will fail to execute.
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