I realize this is an old thread but it is a non-issue. All webservers gather this information and all websites gather this information. It is how they manage traffic, load balancing and any number of other bandwidth related issues that affect how they operate. There are simple widgets you can install on a web page that collect things like client OS , screen resolution, browser, etc. This is old news as the practice has been in use since the early days of the Internet. What I would like to see is the folks at Nexus be more forthcoming with the IP range utilized by their servers, that way you could configure your firewall (you do have a firewall?) to only allow the IP range(s) necessary for you to be able to successfully connect to Nexus database.