I just loaded the dude package in ROS 3.0rc2 (seperate package)... can´t get acces via the web interface like you say, but if you load a dude client on your pc, Dude 3.0rc6 then it will connect and run!
Now I´m wondering what resources I need to run dude (It´s testing on a 153 board) but what about memory, flash, hard drives etc...I just checked the size of my data folder on my live dude server (over 300 routers monitored) and it´s a total size of 30Mb... so maybe that´s a clue.