If you're willing to spend a little bit more money then Mikrotik is the answer. You'll have to try very hard to find the feature that is missing in RouterOS. Rock solid hardware. http://www.mikrotik.com/

http://www.desktoplinux.com/news/NS7546509093.html I tried to post this article on slashdot but it was rejected :-( After opening the free internet clubs in every city in Macedonia for older and poor people which work on Ubuntu, this government continue to pleasantly surprise me :-)