Hi,

I have a computer running Ubuntu Lucid with no internet access, and I'd like to use my N900 to connect it to the internet.

I've worked through these pages:
http://wiki.maemo.org/Bluetooth_DUN
http://wiki.maemo.org/Debian-Tethering

...and I have it at the stage where I can cat < /dev/rfcomm0 and see a few random AT commands being sent for some reason.

Then I used pppconfig to try to set up a ppp link. The tool requires a username and password - what's that all about? I don't have a username and password to connect to the Internet on the N900. When I look in my 3G account I have an access point name of "three.co.uk", and blank username and password.

But in any case, I don't understand why this would be needed on the Ubuntu side. It should connect to the phone, and whatever internet access the phone has should be available to the computer. Right? If I switch from 3G to a wifi connection, it should just use that. All this "dial up networking" and AT command stuff seems rather... 80s.

Anyway, I've gone through the configuration and entered blank usernames and passwords. And when I ifup ppp0 it just does nothing. So what am I supposed to do? How do I debug this? Any suggestions? I'm really confused by this.