I have a client that can't upload jpg images to a secure manufacturing website. She could upload fine until four weeks ago, and then the problem arose and got progressively worse to the point where the staff member can't upload to a secure image site. When she uses her dongle on her home laptop the system works fine but if she uses her work computer or plugs the same laptop into the work network she can only upload the image once and that’s it. If she clears the cache on the browser on her work Pc she can then upload once and then it stops working.
I have bypassed and ruled out the network switch, the fact that she brought her laptop in means that it can't be a GP or domain policy issue. The only thing i can think of is either DNS, ISP (Zen Internet) or the router (Draytek 2820).
Does anybody have any pointers? Is it the website? Some kind of data filtering on the Draytek or maybe DNS. Can you reinstall DNS on SBS 2011 without messing it up?
SBS 2011on a HPML350G6
Win2k8 FTP Server