Internet authentication

Hi everyone.

I’ve installed R1/alpha 1 and it works (at least in VGA mode).
Now I would like to access the web. My ADSL provider however requires authentication (i.e. username, password) .
On Linux I set up access and authentication straightforwardly using pppoeconf.
Running ifconfig on Haiku everything looks fine, green light, I get a quick response when I ping my IP-address, but i don’t know how to configure authentication.
Any suggestion is warmly welcome.