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I am unable to access internet from the Windows Command Processor. Below is the output on doing a simple ping:

C:\Users\vivekkumar>ping www.stackexchange.com

Pinging www.stackexchange.com [198.252.206.16] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 198.252.206.16:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

I checked my firewall settings and found that Windows Command Processor was missing from the list of programs that are allowed to communicate through the Windows Firewall. So, I added it. Also, restarted the firewall service. However, I still get the same issue.

The firewall rules corresponding to cmd.exe now are:

Rule Name:                            Windows Command Processor
----------------------------------------------------------------------
Enabled:                              Yes
Direction:                            In
Profiles:                             Domain,Private,Public
Grouping:                             
LocalIP:                              Any
RemoteIP:                             Any
Protocol:                             TCP
LocalPort:                            Any
RemotePort:                           Any
Edge traversal:                       Yes
Action:                               Allow

There is another similar rule for UDP. Also, I am able to ping computers on my local network and my internet is working fine.

What can I do to resolve this issue.

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1  
If you totally disable your firewall, does the issue resolve itself? Are you behind a proxy or anything similar? – Dave Sep 26 '13 at 11:54
    
Tried disabling the firewall, it didn't work. As per whatismyipaddress.com/proxy-check , yes a Proxy server was detected. – Vivek Sep 26 '13 at 12:09
    
I found that I was indeed behind a proxy and then I found this - superuser.com/questions/175428/how-to-ping-when-behind-a-proxy . So, turns out I can't really use ping. – Vivek Sep 26 '13 at 13:24
up vote 2 down vote accepted

Totally disable your firewall (if safe to do so) is normally a good way to test.

If you are behind a proxy, you can't really get the return.

Edit

As per the link in your comments, more details are here: How to ping when behind a proxy?

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