Skype worked when all others don’t !

For once I feel what could be the only advantage of proprietary nature of the skype technology. Three days ago my internet provider for reasons best known to them decided to implement a system to block all voip applications in order to reduce traffic. I noticed it almost immediately because all the voip applications on my system except skype stopped working. As you can imagine I have lots of them on my system and I used them as frequently as I can so that I can write about them for the benefit of my readers. At the moment I have voipbuster, voipcheap, voipstunt, FWD, dialpad, gizmo, yahoo, iPhone, sipdiscount, Google Talk and skype installed on my system. All of them except skype could not connect to the server, they were all blocked. I then realised that most of the applications are based on the SIP protocol which is an open protocol therefore easy to block if you so wish but skype on the other hand is based on a proprietary technology which is kept secret and since they don’t know how skype operates its difficult to block it or simply that the skype technology is more powerful and could break through whatever firewall they have implemented. Though I have resolved the problems now and all the applications are working fine, this incident makes me feel maybe its nice to keep some things secret.