Hallo, first - thank for your answer - i try it - but it do no not work - here are some code of the Filter
#Name package ApacheKSKBB::session; #Pfade use lib "/usr/lib/perl5/Apache2" ; #Module #use strict; #use warnings; use Apache::Filter (); use Apache::RequestRec (); use Apache::RequestUtil (); use APR::Table (); use Apache::Const -compile => qw(OK); use constant BUFF_LEN => 1024; ############################################################################ # Filter ############################################################################ sub handler { my $f = shift; my $line = '' ; local $/ = undef ; srand() ; ### #File verarbeiten #unless ($f->ctx) { $f->r->headers_out->unset('Content-Length'); $f->r->headers_out->unset('If-Modified-Since') ; $f->r->headers_out->add( 'Cache-Control' => 'no-store,no-cache,must-revalidate' ) ; $f->r->headers_out->add( 'Pragma' => 'no-cache' ); $f->ctx(1); #} my $file = $f->r->filename() ; my $header = $f->r->as_string() ; while ($f->read(my $buffer, BUFF_LEN)) { $line .= $buffer ; } my $nocache=time ; $f->print("<pre>$nocache \n $file \n $header \n</pre> $line<!-- cache:$nocache:NEW -->") ; ### #Neu if ($f->seen_eos) { $f->remove() ; } ### #Ende return Apache::Const::OK ; the output is 1124351373 /var/www/virtual/s-shopping.de/htdocs/index1.html GET /index1.html?asdasd121212121 HTTP/1.1 Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-excel, application/msword, application/vnd.ms-powerpoint, application/x-shockwave-flash, */* Accept-Language: de Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.0.3705) Host: www.s-shopping.de Connection: Keep-Alive HTTP/1.1 (null) Last-Modified: Thu, 18 Aug 2005 07:42:08 GMT ETag: "120fc2-3f12-59aa9400" Accept-Ranges: bytes Cache-Control: no-store,no-cache,must-revalidate Pragma: no-cache I think the problem is, that the scrpipt is defined as a filter > <Files ~ "\.html"> > PerlOutputFilterHandler ApacheMY::session > > </Files> is there an solution for an Filter-Script? The header-entry If-Modified-Since - is out of the header, but i makes no difference. Thank you ... /\/\arkus http://www.perlunity.de