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Hi

my university offers wireless network for the students, there are three networks ( Microsoft, Apple, and Android ), if i was trying to access the internet through Microsoft Wireless Network on my iPhone, a message appears that im using the wrong wireless network.

my question is how do they know which device type im using ?

and sorry for my English :)

Thanks

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Posted

MAC address or user agent maybe?
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Posted

MAC address? I know with a MAC address you can narrow it down to the device manufacturer. I think it can even narrow it down to a specific model. It's a possibility they have a list of MAC address ranges for each device manufacturer and so can filter that way.

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Posted

Thank you guys, you made my day :D

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Posted

[quote name='Tarazena' timestamp='1352933620' post='595320800']
Hi

my university offers wireless network for the students, there are three networks ( Microsoft, Apple, and Android ), if i was trying to access the internet through Microsoft Wireless Network on my iPhone, a message appears that im using the wrong wireless network.

my question is how do they know which device type im using ?

and sorry for my English :)

Thanks
[/quote]
The better question would be why in the **** do they split up their network that way? That makes no logical sense.
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Posted (edited)

Hello,

The first three bytes of a MAC address are its [url="http://en.wikipedia.org/wiki/Organizationally_unique_identifier"]OUI[/url], which are assigned by an [url="http://standards.ieee.org/develop/regauth/oui/public.html"]IEEE Registration Authority[/url]. One publicly available list of OUI's is available [url="http://standards.ieee.org/develop/regauth/oui/oui.txt"]here[/url] on their web site.

Regards,

Aryeh Goretsky Edited by goretsky
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Posted

[quote name='goretsky' timestamp='1352975482' post='595321706']
Hello,

The first three bytes of a MAC address are its [url="http://en.wikipedia.org/wiki/Organizationally_unique_identifier"]OUI[/url], which are assigned by an [url="http://standards.ieee.org/develop/regauth/oui/public.html"]IEEE Registration Authority[/url]. One publicly available list of OUI's is available [url="http://standards.ieee.org/develop/regauth/oui/oui.txt"]here[/url] on their web site.

Regards,

Aryeh Goretsky
[/quote]
Well that gives you the manufacturer of the network card you're using but not what OS you're running, which is ridiculous.

I suspect they just use a proxy that looks at your browsers user agent string.

Try this: if you use Chrome, hit F12, then the "settings" gear in the lower right corner. Hit "Overrides" and mark "User Agent". Set it to Firefox 7 Mac for example. Then try again on the Apple network. It'll probably work :)

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Posted

Well every device must have some sort of signature built in, cuz say when you hook up Bluetooth devices. Windows or whatever OS or other devices know exactly what device is being connected. Or when you do some sort of product update scan on a website, it knows what brand and model of computer you're running and everything inside it. So there's gotta be something giving out all that info.

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Posted

The difference might be that porn only works on the networks for the "obscure" systems... :p

[i]Glassed Silver:ios[/i]

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Posted

The MAC addresses will only tell you the manufacturer of the WiFi module, it won

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Posted

[quote name='LUTZIFER' timestamp='1352976561' post='595321718']
Well every device must have some sort of signature built in, cuz say when you hook up Bluetooth devices. Windows or whatever OS or other devices know exactly what device is being connected. Or when you do some sort of product update scan on a website, it knows what brand and model of computer you're running and everything inside it. So there's gotta be something giving out all that info.
[/quote]
Bluetooth devices specifically send ID's as part of their connection, WiFi doesn't, though it could, but it's not part of the handshake. The reason why bluetooth does this should be fairly obvious ;)

and when you do a update scan on a website, most of them will use a java app to check the hardware on your computer.

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Posted

As to why the odd way of splitting connections up - hmmm.

So you want to split your users up between different AP for load reasons. I would assume they are not all running off the same AP with just different SSIDs? This would be one way to do it without wireless controller to balance load between AP for you.

How else would you split it up with info you could see on the connection without user interaction - user-agent would have the different info for sure.

Just a guess mind you - but would be curious to know the actual reason.. OP can you ask someone in IT at your univ why they do that?

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