Believe it or not, links aren’t just to HTTP(s) websites – they are for anything. You can link to FTP sites and file sharing services in the past have supported linking to content on their clouds, such as Magnet.
With Ubuntu you can link to a package or application for a user to install from their trusted repository. Give it a shot and install the awesome Droid font, Pidgin, nautilus-open-terminal, or all at the same time.
Twitter doesn’t support links from theses protocols, but almost all links on Twitter use URL shortening services like bit.ly or TinyURL. Right now you can use TinyURL to link to unsupported protocols on Twitter. Like I did here.
I can see that Twitter might want to protect users from these unfamiliar links. I don’t think this is making the service any more secure though, since anyone trying an exploit can easily use a redirect as I did.




