Connection with your ISP will be handled by PPP. The PPP Howto document will give you very detailed information about this protocol and how to set-up its numerous parameters.

Through the LEAF packages configuration menu get access to ppp configuration. The following menu will show-up

                        ppp configuration files

        1) ISP pppd options
        2) ISP login script
        3) System wide pppd options
        4) chap secret
        5) pap secret
        
  q) quit
  ----------------------------------------------------------------------------
        Selection:

Enter 1) and 2) and empty out the corresponding files completely

Enter 3) allows you to adjust the parameter of your ppp connection through the /etc/ppp/options file. This file must contain:

debug
name "ISPUserID"
noauth
noipdefault
defaultroute

Edit either the CHAP (Entry 4) or PAP (Entry 5) option to set up how your system authenticates.

For PAP authentication, choose the PAP option and add a line saying "<ISPUserID> * <ISPUserPassword> to the bottom of the file. <ISPUserID> is the same entry that you made in Entry 3) - the "System wide pppd options" file. The <ISPUserPassword> entry is self-explanatory. The "*" can be replaced with the IP address or name of the server you are dialling into if you know it. Usually, an asterisk is sufficient.

If you want to authenticate using CHAP, add the same entry to the CHAP item instead.

Backup the ppp.lrp package.