Jul
22
2010

Problem accessing a specific website ?

I was experiencing a problem with my Internet connection, I was not able to access a specific website from my Internet Connection.

Lately I found out that there are several reasons for this problem. The reasons can be the DNS cache in your system may not be updated properly, or it can be a problem with your Service provider’s DNS cache.  It is really annoying when it happens with one of your favorite web sites. However there are a few things you can do to solve this problem.

Clear your browser cache

Try clearing your browser cache. If you are unsure about how to do this; please follow this link :  http://bit.ly/bi6KD7

Sometimes this won’t work and you may need to try something else, if clearing your browser cache is not working for you then now it’s time to do a little trick. We need to flush(clear) our local DNS cache (This is very useful while you are busy moving your site; mostly because your local dns cache usually remembers the previous results for a few more minutes.) Let us see how to clear the local dns cache.

Clearing Local DNS cache (Windows)

If you are using windows then you have to open your command window (go to start menu -> click on run -> type cmd there and press enter.), make sure you have administrative privilege to do this. Now you have to type a command inorder to clear your DNS cache.

ipconfig /flushdns

this will help you clear the local dns cache (If you are on windows vista you have to start your command prompt with administrative privilege; which can be done by typing cmd in the search field in start menu and  then right click and you will see a Run as administrator option and execute the above command)

Clearing Local DNS cache (Linux)

I am using Ubuntu; by default it doesn’t come with the daemon to flush the local DNS cache; so if you are using Ubuntu linux then you will have to install nscd daemon by running the following command in your terminal.

sudo apt-get install nscd

Once nscd daemon is installed you can run by typing the following command

sudo /etc/init.d/nscd restart

If you are using other Linux flavors probably you can try this and see if it works.

try this command in your terminal  : /etc/rc.d/init.d/nscd restart

Still your problem is not solved ?

Then most probably it has something to do with your Internet Service Providers DNS cache; So call then and tell your problem, they will provide you with an alternative proxy address, or they will solve the problem for you.

If you are a Virgin Meda Broadband user in UK, then  try this

I use the Virgin Media Broadband; they have provided me with a new proxy address : webcache.virginmedia.com and port: 8080

(Follow the instructions here : http://bit.ly/95DAJi to set up your proxy settings)

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About the Author: Deepak Dharan Padmini

Passionate Geek specialized in Information Security and Web Technologies who spends his weekends building and testing mini robots..

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