Connection with your ISP will be handled by PPP. The PPP How-to document will give you very detailed information about this protocol and how to set-up the 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
        6) pppd daemon script

  q) quit
  ----------------------------------------------------------------------------
        Selection:

Entry 1) allows you to adjust the parameter of your ppp connection through the /etc/ppp/peers/provider file. The most important argument is the ttySx parameter which defines the serial port to which your modem is connected.

A working /etc/ppp/peers/provider file for a Compuserve connection could look like:

# ISP pppd options file
# What follows is OK for Compuserve
#
noauth
debug           # log transaction to /var/log/messages
/dev/ttyS0      # (ttyS0=com1, ttyS1=com2, ...)
115200          # baud  rate
modem
crtscts         # use hardware flow control
asyncmap 0
defaultroute    # ppp becomes default route to the internet
noipdefault
lock            # don't let other processes besides PPP use the device
connect "/usr/sbin/chat -v -f /etc/chatscripts/provider"

If you plan to dial into a Windows RAS server or a server that uses PAP or CHAP authentication, you need to add a line to this file. Just above the "connect" command, on a line of its own, add:

name your_ISP_login
connect "/usr/sbin/chat -v -f /etc/chatscripts/provider"

You need this because ppp has to masquerade the firewall as you when using PAP or CHAP authentication.

Entry 2) allows you to adjust the communication script which will handle the connection with your ISP. This script is stored in the /etc/chatscripts/provider

A working script for a Compuserve connection could look like:

# ISP login script
# What follows is OK for Compuserve
# Adjust to your taste
ABORT "BUSY"
ABORT "NO CARRIER"
ABORT "VOICE"
ABORT "NO DIALTONE"
ABORT "NO ANSWER"
"" ATZ
# ISP telephone number: 124567890
OK ATDT1234567890#
CONNECT ''
Name: CIS
# With compuserve your_login_account=12345,6789
ID: your_login_account/go:pppconnect
Password: your_password
PPP

If you are not using Compuserve you should also delete all of the lines below the <CONNECT ''> line. A few - very few - ISPs require the final "PPP" line these days.

Edit Entry 3) - /etc/ppp/options "System-wide pppd options" if you want the system to demand dial and to drop the line if idle for a preset time. To do this, change "persist" to "demand" and add another line below "demand" that says "idle 600", where 600 is the number of seconds the system should wait before dropping hanging up if there is no network traffic.

Edit either the PAP (Entry 4) or CHAP (Entry 5) option to set up how your system authenticates. For PAP authentication, choose the PAP option and add a line giving your ISP login and password. Your ISP login must be the same antry as the one provided after the name entry in your ISP pppd options file. If you want to authenticate using CHAP, add the same entry to the CHAP item instead.

# pppd: pap-secrets
# Secrets for authentication using PAP
# client        server  secret                  IP addresses
your_ISP_login    *     your_password

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.

Backup the ppp.lrp package.