Connecting to the SCS dialups under Linux

To connect to the SCS dialups via modem under Linux, you'll need to create three files:

/etc/sysconfig/network-scripts/ifcfg-ppp0

DEVICE=ppp0
ONBOOT=no
MODEMPORT=/dev/modem
LINESPEED=115200
HARDFLOWCTL=yes
DEFROUTE=yes
PAPNAME=<username>
PPPOPTIONS=noipdefault

Make sure that /dev/modem is a symlink to a real device, for example, if your modem is on COM1, it should point to /dev/ttyS0. Make sure that the device /dev/modem points to is really the modem. If you have a winmodem, it might need special configuration under linux, or it might not work at all.

/etc/sysconfig/network-scripts/chat-ppp0

"" ATDT6211139 CONNECT

Edit the number following the ATDT appropriately. For example, if you were dialing in from off campus, it would be ATDT14126211139. Check the dialups page for more details.

/etc/ppp/pap-secrets

# Secrets for authentication using PAP
# client        server  secret                  IP addresses
<username>      ppp0    <password>

You'll need to replace the username and password above with the appropriate values.(Usually your kerberos ID and password)

Once the three files are created, make sure that there is an /etc/ppp/peers directory, if you haven't already created one. pppd will put entries in this directory. That's all there is to it. To bring up the PPP connection, run:

   /etc/sysconfig/network-scripts/ifup ifcfg-ppp0

To bring it down, you can run:

        
        /etc/sysconfig/network-scripts/ifdown ifcfg-ppp0