Internet Connection Ok But No Content Use Public DNS

Many a times we run into a very unique problem wherein we see that though we are connected properly to our internet service provider (ISP), but we are able to access a few sites only while others may not load or return a “host not found at given address” error.

Typical symptoms of above problem will be”

1. The connection to the ISP is shown as connected on your PC.
2. If you are connected through ADSL modem, you see the DSL light glowing constantly as well as the internet LED blinking, showing internet activity OK.
3. You are able to see the web page of few sites, while others may not load at all.
4. Your internet access time is very slow for certain sites.
5. Till very recently you had a perfect internet connection and suddenly you are not able to access certain sites etc.

Above may be a result of improper DNS i.e. Domain Name Server settings in your network settings.
Generally we are provided with a DNS server setting which our PC fetches from the ISP at connection start up. God forbid if the ISP’s configured DNS server goes down, then you run into the above kind of problems.

Thats too much for the explaination of the problem, but whats the solution????

All you have to do is to set up your DNS entry to a public DNS may be one hosted by Google (at 8.8.8.8) and this is how you do it:

On Windows platform:

1. Open Network Settings in Control Panel.
2. Right Click and select properties on the network adapter, through which you connect to your ISP i.e. through which you access your internet connection. It can be the wireless adapter if you connect through wi-fi or LAN/ ethernet card if you connect through UTP cable.
3. A pop up window will show you certain properties of your network adapter. Scroll down till you see an entry “TCP/IP”. Select it and click on properties button below (which gets highlighted as you select “TCP/IP”)
4. Another pop-up window will show you the IP address and DNS settings.
5. Go down to the Domain Name Server (DNS) address. Generally it will be selected as “Obtain automatically from ISP”.
6. Change it to “Use following DNS server” and punch the following values into the address field:

8.8.8.8

7. Click on OK buttons till you reach back to the network connections window.
8. Now you may check for loading of websites in your browser, and the problem should be resolved.

Happy Surfing…..

Prevent Spread of Virus Through USB Devices

To prevent spread of virus through USB devices (memory sticks, memory cards, other plug n play devices with their own memory/ storage, follow a very simple trick.

When you plug in the device and Windows ask you what to do, do nothing and click cancel.

To browse for the files on the device, never (R) never double click and open the folder icon. Instead, right click and select the explore option. preetisblog.com

This will prevent majority of the Virus programs from running, which are configured to run in place of the auto-run programs/ hidden in the open command of Windows.

Wish u a safe n happy computer usage……

How to recover Linux after installing Windows in a dual boot system……

If we install any Windows Operating System (Windows XP, Windows 7 etc) on a computer already having Linux based Operating System (Ubuntu, Kubuntu, Suse etc), the system is not able to boot into Linux based OS, as Windows installers overwrite the GRUB boot loader during installation. As a result we don’t get any option to select the operating system during boot up and system boots up into Windows straight away.

This may create a lot of panic in the mind of the user as there are fears of loosing complete Linux based installations. But no need to worry as the installed Linux based system is already there. What we need to actually do is to restore the GRUB in Linux mode.

For the above problem we need to do following:

Download SuperGRUB from http://www.supergrubdisk.org/.

Burn the ISO into a CD using a CD burner tool.

Make sure your system is set up to boot from the CD (in the BIOS set up).

Reboot your computer after placing the CD so burned, into the CD tray.

The computer will boot up from CD and will load GRUB 2 and show you a screen as shown below.

grub2 screenshot

Select the option named “Detect any Operating System” using arrow keys and press enter key.

Please wait for a while, during which the superGRUB searches for the installed operating systems.

It will show up a list of all the Operating Systems installed in your computer.

Select the latest version of Linux Kernel shown from the available choices using the arrow keys and then press enter.

And you will see your system booting up into your Linux installation.

After complete loading of the Operating System you see your familiar desktop. This was all fine to boot up your system once. But to have a permanent choice of the Operating Systems we need to Install and Update the GRUB on the hard disk drive.

For this please follow the relevant instructions for your relevant distribution of Linux. For example, you may use the following link for doing the same on Ubuntu….

Update Grub