What is upstream in opensource?
How to see upstream website url?
Package maintainers in linux distributions like Fedora would build and submit rpm packages of any opensource software which they think would be useful to be included in Fedora. The people who originally created the software is called upstream.
The website url of the upstream software maintainer is included in the rpm spec file. The url can be seen in the output of 'rpm -qi
$ rpm -qi vpnc|grep URL
URL : http://www.unix-ag.uni-kl.de/~massar/vpnc/