I´ve opened a couple of calls a year ago to handle this issue, no luck. We are ISA here as well.PTC did not give a $hit to solve them. After a year, the call remains opened, asI was told that the Download Manager is provided by a third company and they do not know exactly how it works. I´ve asked them about the firewall implications, such as protocols, ports and such. No luck mate!
Sorry for these news.
Daniel Santos - Sr. NC Programmer / CAM Support
Liebherr Aerospace Brasil
I've had similar issues. I cannot download anything that over 2GB. In each case, the connection will time-out. I've tried PTC's download manager, IE 7 & 8, FireFox, and FlashGet. I submitted a call to PTC a few months ago, but they were unable to help.