There are a variety of methods available to determine which version of EZproxy is running on your server.
If you are running EZproxy for Linux or Solaris, you can issue a command like:
changing /usr/local/ezproxy/ to the directory where EZproxy is installed.
If you are running EZproxy for Windows, you can issue a command like:
changing c:\ezproxy\ to the directory where EZproxy is installed.
With EZproxy for Windows, you can right-click on the ezproxy.exe file, select Properties, and go to the Version tab. The complete EZproxy version appears in the description.
The version appears on the EZproxy Administration page.