Embedded fonts not shown on url with redirection

Your problem is something called Cross Origin Resource Sharing (CORS). You can see that by opening http://www.vingtsun-info.de/ in Chrome, pressing Ctrl-Shift-I, and clicking the Console menu item. You should see this:

Font from origin 'http://www.vingtsun-info.de' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://www.wt-dachau.de' is therefore not allowed access.

What this means is that there is a security protocol in place that prevents sites from sharing resources from another site. This is to prevent potentially malicious scripts from another site from executing on your own site, but sometimes this can prevents fonts from being shared as well. Not sure what you can do, you can try looking at this article or this article for a solution.