Server State: ISA2006 as proxy-server (single nic) Rule: HTTP Users from internal to external with content type: applicatie/pdf , .pdf and several other types for normal webbrowsing. Rule is open for everyone.
Client: Internet Explorer, Acrobat Reader 8 Acrobat reader Internet setting: "Display PDF in browser" and "Allow fast web view" are selected.
Problem: When a user opens a large (> 200 KB) pdf file in a webpage the first page is displayed in de browserwindow and a error message is display "A network error occured while accessing this document on the internet"
A workaround is to de-select the "Allow fast web view" in Acrobat reader.
Data is transmitted and the first part of the pdf is displayed (fast view). Then my pdf client start downloading the rest of the pdf in the background. My client send this requests to the server for the remaining parts of the pdf.
Notice the two content-type fields. The first with "multipart/byteranges" and the second with application/pdf. I assume that ISA server (2006+SP1) is only inspecting the first Content-type field in the header, this is the reason that the rule is not handling this connection and the default rule is denying the connection.
When I add the contenttype multipart/byteranges to the selected content types of the rule, the fast viewing feature of adobe reader is working.
For me, this is an workaround. Who is to blame, Adobe of Microsoft?
< Message edited by zaan -- 15.Aug.2008 5:31:23 PM >