Yes, this will not work at all in countries/ISP with VoIP blockage. You might check mizutech voip tunnel (http://www.mizu-voip.com/Software/VoIPTunnel.aspx http

Yes, this will not work at all in countries/ISP with VoIP blockage. You might check mizutech voip tunnel (http://www.mizu-voip.com/Software/VoIPTunnel.aspx http://www.mizu-voip.com/Software/VoIPTunnel.aspx) using more serious encryption and obfuscation and still in need for constant improvements because of "deep packet inspection" used nowadays by many ISP's. Some provider blocks all UDP, some allows only HTTP on port 80 and there are ISP's with even more restrictions. For example in Iran the ISP just drops all stream with both up and download, thus making all these kind of simple hacks unusable. (To bypass such kind of blockage you need to split your traffic to multiple up/download links via multiple server addresses).