ok, 30 mins might be the real value (4786 with Firefox 3.6 or Opera 11). But it isn't the felt value :-)
This is too short, I mean. I'm working IN my network with lots of Ciscos, Open-e-s, 150 Servers. I've got dozens of consoles, webGUIs etc where I'm working on, and Open-e is the only one that kicks me out after such a short time.
This is annoying since, often, the webGUI takes a lot of time before returning to a state where I can do the next step. And when it's back, the session is timed out.
F.i. after creating a new volume on the primary and secondary Open-e, both webGUIs become gray and are processing some minutes. I don't want to wait, thus I'll do something else with another management console. After that, I return to the Open-e-s and I'm welcome by two login dialogs. Args.