schon kindisch, oder?
$ curl --head http://www.wetteronline.de/wetter/traunstein
HTTP/1.1 403 Forbidden
Server: AkamaiGHost
Mime-Version: 1.0
Content-Type: text/html
Content-Length: 290
Expires: Mon, 27 Apr 2015 21:01:07 GMT
Date: Mon, 27 Apr 2015 21:01:07 GMT
Connection: keep-alive
Vary: User-Agent
$ curl -A Mozilla --head http://www.wetteronline.de/wetter/traunstein
HTTP/1.1 200 OK
Server: Apache
res-obj: www
Content-Type: text/html; charset=UTF-8
Date: Mon, 27 Apr 2015 21:01:14 GMT
Content-Length: 132153
Connection: keep-alive
Vary: User-Agent