For some reason in Fedora 11 setting the proxy via the GNOME proxy settings dialogue doesn’t let the package manager know about the proxy. (Though to be fair it doesn’t in Ubuntu either but at least there appears to be one program (Synaptic) which allows you to change the settings.)
Anyway to get around this annoyance: http://fedoraproject.org/wiki/Docs/Drafts/SoftwareManagementGuide/YumProxy appears to offer the best guidance. In Durham you would put:
yum.conf file. I’m not sure if the graphical tools will work with this but the command line appears to be zipping along with the 175 updates!
On the plus side Firefox appears to now recognise the GNOME proxy settings! Which is great as when your software manager and your web-browser don’t respect the dialog you wonder what it is for….