Translations:Handbook:Parts/Installation/Networking/37/en
From Gentoo Wiki
If something goes wrong, double-check that the username and password are correct by looking at /etc/ppp/pap-secrets or /etc/ppp/chap-secrets and make sure to use the right Ethernet device. If the Ethernet device does not exist, the appropriate network modules need to be loaded. In that case continue with Manual network configuration as it will explain how to load the appropriate network modules there.