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In my institution we have a main server computer to which all other computers are connected via Wired Connection or WIFI.

Internet connection is provided to the Server computer and all computers on the network are accessing this Internet connection.

I want such a system that when any computer in the network tries to access the Internet connection, a password prompt dialog appears on that computer and if that computer user is having a valid username and password, then only the internet access is allowed or else the internet connection remain blocked.

But here in this case normal LAN connection, File sharing and other functionalities other than Internet connection should be still available.

Is there any way to accomplish this?
Can we do something like some ISP's do while someone try to access their internet connection..??
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Sergey Alexandrovich Kryukov 7-Sep-13 12:59pm    
This is quite possible, but what kind of institution is that if it limits access to Internet in any way?!
—SA
HeinrichRichardSonButt 7-Sep-13 13:04pm    
This is a company which provides security services. I am a student trainee over here and I want to develop such a system which makes employee log in for internet access and then it tracks all the usage information. This is basically intended for the company's security. Please help me out in this.
Sergey Alexandrovich Kryukov 7-Sep-13 20:02pm    
I hope people in this company know about security (they are supposed to) and can answer your question.
I answered one of your questions, on Wi-Fi, please see.
—SA
HeinrichRichardSonButt 8-Sep-13 5:47am    
Thanx, but I already know about WEP, WPA and WPA2. And it isn't exactly what I am looking for. Thanx again.
Sergey Alexandrovich Kryukov 8-Sep-13 11:20am    
My answer was not to give you links to them. I explained how you can protect Wi-Fi connection from strangers, but perhaps you did not notice that...
—SA

1 solution

With Wi-Fi, the normal practice is this: 1) you can use one of Wi-Fi securing methods, most typically WPA2, to allow access with a pass phrase, but this secret phrase is the same for all computers; 2) you can configure wireless router to allow connection only for computers with known MAC address, but the system administrator has to collect valid MAC addresses and support the list of them stored on the router; every new wireless adapter has to be registered on the router data this way.

Please see:
http://en.wikipedia.org/wiki/WiFi#Securing_methods[^],
http://en.wikipedia.org/wiki/WPA2[^],
http://en.wikipedia.org/wiki/MAC_address[^].

The wired access to the Internet is practically never blocked. If someone gets access to the wire, it is quite apparent, so usually only the authorized people will physically connect. Even if some stranger connects to the Internet, it is no more dangerous to your corporate network that any Internet user on any other location. You should really allow wired access to Internet without any limitations, but your corporate domain(s) should be protected (and usually, it is based on password protection, typically using your domain authentication). It has nothing to do with your question.

If you really want to limit Internet access, this is quite possible, but I don't even want to discuss it, as it would make no sense at all and would be simply mean doing the evil. Sorry.

—SA
 
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