1. Die ppp-on file:

#!/bin/sh 
# 
# file: /etc/ppp/ppp-on 
# 
# This script is based on the script "ppp-on" found at 
# ftp://sunsite.unc.edu/pub/Linux/system/Network/serial/ppp/ppp-2.2.0f.tar.gz 
# 
# Script to initiate a ppp connection. This is the first part of the 
# pair of scripts. This is not a secure pair of scripts as the codes 
# are visible with the 'ps' command.  However, it is simple. 
# 
# These are the parameters. Change as needed. 
LOCAL_IP=0.0.0.0	# Local IP address if known. Dynamic = 0.0.0.0 
REMOTE_IP=0.0.0.0	# Remote IP address if desired. Normally 0.0.0.0 
DEVICE=/dev/modem 
#NETMASK=255.255.255.0	# The proper netmask if needed 
# 
# export current tty to enable output in dialer script 
# 
export TERMINAL=`tty`
# 
# This is the location of the script which dials the phone and logs
# in.  Please use the absolute file name as the $PATH variable is not
# used on the connect option.  (To do so on a 'root' account would be
# a security hole so don't ask.)
#
DIALER_SCRIPT=/etc/ppp/redialer
#
# Initiate the connection
# 
# I put most of the common options on this command. Please, don't
# forget the 'lock' option or some programs such as mgetty will not
# work. The asyncmap and escape will permit the PPP link to work with
# a telnet or rlogin connection. You are welcome to make any changes
# as desired. Don't use the 'defaultroute' option if you currently
# have a default route to an ethernet gateway.
#
#

SPEED=115200

# Set baud
stty $SPEED -tostop

PPP_FLAGS="mru 1524 modem defaultroute crtscts noipdefault"

/usr/sbin/pppd lock connect $DIALER_SCRIPT $DEVICE $SPEED $PPP_FLAGS \
$LOCAL_IP:$REMOTE_IP +ua /etc/ppp/account

2. Die ppp-off file:

#!/bin/sh
#
# file: /etc/ppp/ppp-off
#
######################################################################
#
# Determine the device to be terminated.
#
if [ "$1" = "" ]; then
	DEVICE=ppp0
else
	DEVICE=$1
fi

######################################################################
#
# If the ppp0 pid file is present then the program is running. Stop it.
if [ -r /var/run/$DEVICE.pid ]; then
        kill -INT `cat /var/run/$DEVICE.pid`
#
# If the kill did not work then there is no process running for this
# pid. It may also mean that the lock file will be left. You may wish
# to delete the lock file at the same time.
        if [ ! "$?" = "0" ]; then
                rm -f /var/run/$DEVICE.pid
                echo "ERROR: Removed stale pid file"
                exit 1
        fi
#
# Success. Let pppd clean up its own junk.
        echo "PPP link to $DEVICE terminated."
        exit 0
fi
#
# The ppp process is not running for ppp0
echo "ERROR: PPP link is not active on $DEVICE"
exit 1

3. Die redialer file:

#!/bin/sh
#
# file: /etc/ppp/redialer
#
# This script is based on the script "redialer" found at
# ftp://sunsite.unc.edu/pub/Linux/system/Network/serial/ppp/ppp-2.2.0f.tar.gz
# It should work with previous versions of chat too
# 
###################################################################
#
# These parameters control the attack dialing sequence.
#
# Maximum number of attempts to reach the telephone number(s)
MAX_ATTEMPTS=5

# Delay between each of the attempts (in seconds).
SLEEP_DELAY=5

# Terminal to echo output, exported from "ppp-on"
if [ "w$TERMINAL" = "w" ]; then
   TERMINAL=/dev/console
fi

###################################################################
#
# This is a list of telephone numbers.

PHONE1=
numbers=1

###################################################################
#
# Script to dial a telephone
# You probably have to change the initialization string 
# Check your modem manual

function callnumber
{

/usr/sbin/chat -v					\
	TIMEOUT		5				\
	ABORT		'\nBUSY\r'			\
	ABORT		'\nNO CARRIER\r'		\
	ABORT		'\nRING\r\n\r\nRING\r'		\
	ABORT 		'\nNO DIALTONE\r'		\
	ABORT		'\nERROR\r'			\
	''		'+++ATZ'			\
	OK 		'AT&F0E0'			\
	TIMEOUT		45				\
	OK		ATDT$1				\
	'CONNECT 115200' ''

#
# decide what to do depending on exitcode of chat
#
case $? in
   0) echo Connection established > $TERMINAL; exit 0;;
   1) echo chat: exit 1, see manpage for details. > $TERMINAL; exit 1;;
   2) echo chat: exit 2, see manpage for details. > $TERMINAL; exit 2;;
   3) echo chat: exit 3, see manpage for details. > $TERMINAL; exit 3;;
   4) echo Line busy. > $TERMINAL;;
   5) echo No Carrier. > $TERMINAL;;
   6) echo A call is coming. Exiting! > $TERMINAL; exit 1;;
   7) echo No dialtone. > $TERMINAL;;
   8) echo An error occured. Exiting! > $TERMINAL; exit 1;;
esac
return
}

###################################################################
#
# Function, that displays the rest of time before the next number 
# is dialed

function sleeping
{
REST=$SLEEP_DELAY
while [ $REST -ne 0 ]; do
   echo -ne Next trial in $REST seconds. "\r" > $TERMINAL
   sleep 1s
   REST=`expr $REST - 1`
done 
echo "Next trial now.         " "\r" > $TERMINAL
return
}

###################################################################
#
# Dial telephone numbers until one answers

attempt=0
while : ; do
   echo -e "\n" > $TERMINAL
   attempt=`expr $attempt + 1`
   echo "Dialing attempt number: $attempt" > $TERMINAL
   n=`expr $attempt % $numbers`
   if [ $n -eq 0 ]; then
      n=$numbers 
   fi
   NUMBER=`eval echo '$PHONE'$n`
   callnumber $NUMBER
   if [ $attempt -eq $MAX_ATTEMPTS ]; then
      exit 1
   fi	
   sleeping
done

4. Die account file:

Diese Datei enthält die Benutzer-Kennung des Bürgernetzes in der Form zweier Zeilen:
"gapxxxx"
"passwd"

5. Die options file:

Die options-Datei enthält einige Befehlsargumente für den pppd, und kann hier, da bereits alle Optionen im ppp-on script angeben sind, leer sein. Wenns Probleme gibt schreiben Sie in die Datei ein Lock, mehr nicht!

Achtung die Datei wird gebraucht, auch wenn sie nur leer ist!