Universities and offices often block "Software/Freeware" categories to save bandwidth or prevent unauthorized installations.
Navigating Restricted Access: The Essential Guide to P30Download Proxies p30download proxy
If the proxy server is located in a region where P30Download isn't blocked, you can surf the site freely. p30download proxy
A proxy acts as an intermediary between your computer and the P30Download servers. Instead of your browser requesting data directly from the site, it asks the proxy server to fetch it. p30download proxy