Instructions for setting up the proxy server on Mac OS X.
Go to the Network settings.

Enter in the Web Proxy Server field: proxy.uoa.gr and in the right box: 8080.
Check the "Proxy server requires password" option and enter your account details in the "Username" and "Password" fields.

The configuration of the proxy server is complete.
Note
In case you do not enter your account details in the above fields, the following screen will appear, where you can enter them.

If you want to check that you have received a university IP address, you can visit: