Modem connects but can't surf

I've been trying to troubleshoot a problem on a friend's Toshiba laptop loaded
with SuSE 8.0

PPP will make a dialup connection to his ISP, Earthlink, but Konqueror doesn't
seem to recongnise that a connection to the Internet is there.

At Bill Lindley's suggestion I had him do a "route add default ppp0" thinking
that the default route was set to eth0. The modem is a Xircom ethernet/modem
combo PCMCIA card. No luck.

Where else should I be looking? What logs should I ask him to e-mail me?

Vielen dank im Voraus fuer einige Hinweise,

Dennis Kibbe