I am behind at least one corporate firewall and proxy server and disabling AV is not an option. I need to know what ports National Instruments uses for its NI Update Service as well as the URL that is being contacted so I can get ports opened for this purpose.
Not really sure, but I would be surprised if they used anything else than 80 or possible the https port 443 for protected connections, as that are the only ports that guarantee some serious chance to not get blocked by default by most firewalls.
In our case, if the traffice is not HTTP traffic, it is typically blocked. I know that the update service can see updates but it is not able to download them.
Are you familiar with the Windows Command netstat? This Microsoft KB might help you figure out how to determine what port the NI Update Service is using.
