Are there any open source/free alternatives to EZProxy?
For those who are not familiar with EZProxy, it's a proxy server that allows users to access institutional subscriptions (like journal subscriptions) that work based on your IP range, like if your university library is subscribed to an online journal, you can append the ezproxy url for your library to the journal url and read the journal, all the links are automatically rewritten by the proxy.
I DON'T WANT TO DO ANYTHING ILLEGAL. I JUST DON'T WANT TO BUY the EZProxy itself. We have legally obtained subscriptions and I want to allow access to these (which is acceptable by the content providers) through EZProxy. But I want to see if there are any alternatives to the EZProxy itself.