Networking – Connect to two WiFi networks – use one for internet, the second for LAN-only connections

This can be done by setting up your windows machine as a very simple wireless access point, similar to the ad-hoc functionality, more difficult to set up but far more robust, i.e. any device that supports WiFi will be able to connect. It is known as 'hostednetwork' and uses the built-in Microsoft Virtual WiFi Adapter.

To set it up, bring up the elevated command prompt by pressing Win-key, typing cmd and hitting Ctrl-Shift-Enter. Then enter the following command:

netsh wlan set hostednetwork mode=allow "ssid=<ssid>" “key=<passphrase>” keyUsage=persistent

Most options are quite self-explanatory, but you can get more info using netsh wlan help. After executing this command, the hostednetwork will be stored permanently, but still needs to be started and stopped manually. You might want to create some sort of shortcut for the following commands:

netsh wlan start hostednetwork
netsh wlan stop hostednetwork

Note that these commands too must be run as admin.

At this point, a new item should have appeared in the 'network connections' section of the Windows network center. You can edit its properties, but the default settings should work just fine. Your phone should be able to detect the freshly made access point and connect to it, obtaining an IP-address in the 192.168.137.0/24 range. Don't worry though, this will not affect the wired connection on your computer, as they're both using different networks.

While a connection has been established, your pc will not allow machines on the wireless port to interface with any other ports and by extension, the internet. For this, you can use Internet Connection Sharing (ICS). Edit the properties of your wired interface, bring up the 'Sharing' tab, check the box to enable this feature and select the corresponding interface, the wireless AP that is. The interface is a bit buggy, you might need to revert, close the window and try again if you go wrong.

Voila, internet on your Android via your pc.

What OS and version?

For Windows 7, the instructions are at:

http://windows.microsoft.com/en-GB/windows-vista/Create-a-network-bridge

A network bridge is software or hardware that connects two or more networks so that they can communicate. You can create only one network bridge on a computer, but one bridge can handle any number of network connections.

1) Open Network Connections by clicking the Start button Picture of the Start button, clicking Control Panel, clicking Network and Internet, clicking Network and Sharing Center, and then clicking Manage network connections.

2) Hold down CTRL and select each network connection that you want to add to the bridge.

3) Right-click one of the selected network connections, and then click Bridge Connections. Administrator permission required If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

BUT! There is an important warning at the bottom. So think carefully about the security of what you are doing.

Warning

You shouldn't create a bridge between an Internet connection and a network connection because it creates an unprotected link between your network and the Internet, which makes your network accessible to anyone on the Internet.

UPDATE

So here's the thing, any network has resources on it that require protection. So when you bridge two networks together, you are often undoing or bypassing the security and control for BOTH of them.

In your case, you are trying to join one network to your university network, you are almost certainly breaking all sorts of rules that you have agreed to when connecting.

With what you are doing, you are allowing any machine on your own private network to connect to the university network without the controls that the university apply.