Comment vnc again (Score 1) 247
I admit I didn't read every last reply but have you considered uVNC single click? It comes default with an encryption plugin and you simply email the no-install exe to your relative. Or I suppose you could host it on a web site. This app ends itself once the intended helper disconnects. It solves the port problem on the customer side, is secure, and simple. The only caveat is, it's windows only.