In such cases, you work with environment variables. The doc lists the following example: SetEnvIf MyRequestHeader myvalue HAVE_MyRequestHeader Header set MyHeader "%D %t mytext" env=HAVE_MyRequestHeader Alternatively you can set the environment variable via mod_rewrite to allow for more complicated conditions. hope this helps, Christian -- Christian Folini, IT 222 Webserver Security Engineer -----Ursprüngliche Nachricht----- Von: Harald Falkenberg [mailto:harald.falkenberg@xxxxxxx] Gesendet: Mittwoch, 29. Oktober 2008 15:14 An: Folini Christian, IT222 extern Cc: users@xxxxxxxxxxxxxxxx Betreff: Re: AW: Stripping or setting certain http response headerrs Hi, yes, I saw it already. But how to change http response headers only in certain cases? For certain user agents? If you can give me an example, that would be nice. regards Harald --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx