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School computers connect to web page, others cannot.

Jerry Thompson
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Last Modified: 2016-10-26
I am the Network Admin for a small Christian School.  We have about 175 devices a mixture of windows 7 and 10 predominantly.

What I don't understand is that some computers can connect to a web site and others cannot connect to the same website.

Desktops seem to be able to connect and laptops cannot.  I thought it might be a wireless vs wired issue, but even if I turn off the wireless and connect with a wire, the laptop still cannot connect.

I have cleared the various caches and flushed the dns on the laptop.  I have tried 3 different browsers.

I do a ping test to the same web site from the wire connected laptop, it says destination unavailable. I can successfully ping google at the same time from the same laptop.  So it is not a connection to the network or internet issue.

On a desktop, I can ping both google and the other target website without a problem.

So what would block the same web site from one computer but not the other computer on the same network, sharing the same router, series of switches, wires, etc.?

In this test the computers are both windows 7.  We use opendns.org for our content filter. All computers have the same antivirus, thirtyseven4.  Firewall settings are the same and controlled by thirtyseven4 for each device from the server.

Thank you.

jerlo
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