Lighttpd

#!rst 

server.range-requests option
============================

server.range-requests

    defines if range requests are allowed or not.

    range request are requests of one or more sub-ranges of a file. Range requests are very helpful for interrupted downloads and fetching small portions of huge files.  

    Default: enabled

    IE can crash when it tries to open a pdf file. 
    This setting in the config fixes it: ::

       $HTTP["url"] =~ "\.pdf$" { 
           server.range-requests = "disable" 
       }