letencrypt is in beta testing for now. And they did not claim whether they were going to make this service free forever. I tried letencrypt, and it works like

letencrypt is in beta testing for now. And they did not claim whether they were going to make this service free forever. I tried letencrypt, and it works like a charm. But the sad thing is that it needs you to update every 3 months at least for now. And they may have auto-updating script for this, but it is not supported well. Currently the scripts only work for Apache HTTP servers, rather Nginx ones (will work in the future) . I update certificates every 2 months by hands...