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8. ISDN

I am including this although this has nothing to do with qmail or mh. But without a PPP line to your ISP there is no email at all. I had quite a bit of bother to get my ISDN working. The SusE distribution includes a configuration for ISDN, but I wanted something simpler. The stuff here was adapted from Bernhard Hailer's scripts. (Vielen, vielen dank!)

The following rc.config loads the necessary modules during initialisation:

#!/bin/bash
# This is adapted Bernhard Hailer's old script

LOCAL_NUMBER="91311234"        # tel no. 091311234
REMOTE_NUMBER="0911123456"     # ISP tel no.
LOCAL_IP="192.168.0.99"        # I have dynamic IP so this will do
REMOTE_IP="195.112.123.11"     # your ISP's gateway
DEVICE="ippp0"

SYSPATH="/sbin"
ISDNCTRL="$SYSPATH/isdnctrl"

case "$1" in
start)
        # turn on isdn
        insmod /lib/modules/2.0.33/net/slhc.o
        insmod /lib/modules/2.0.33/misc/isdn.o
        sleep 1
        # load the hisax module
        insmod /lib/modules/2.0.33/misc/hisax.o 
                                   id=Tel0 type=5 protocol=2 irq=10 io=0x300 
        echo "starting isdn4linux"
        # global
        $ISDNCTRL verbose 0

        $ISDNCTRL addif $DEVICE         # create new interface
        $ISDNCTRL addphone $DEVICE in $REMOTE_NUMBER
        $ISDNCTRL addphone $DEVICE out $REMOTE_NUMBER
        $ISDNCTRL eaz $DEVICE $LOCAL_NUMBER
        $ISDNCTRL l2_prot $DEVICE hdlc
        $ISDNCTRL l3_prot $DEVICE trans
        $ISDNCTRL encap $DEVICE syncppp
        $ISDNCTRL huptimeout $DEVICE 300 
        $ISDNCTRL chargehup  $DEVICE off
        $ISDNCTRL secure $DEVICE on

        $SYSPATH/ifconfig $DEVICE $LOCAL_IP pointopoint $REMOTE_IP metric 1
        $SYSPATH/route add default $DEVICE
        $SYSPATH/ipppd /dev/ippp0 file /etc/ppp/options.ipppd &
        $SYSPATH/route del default
        
        ;;
stop)
        #turn off isdn
        rmmod hisax.o  
        sleep 1
        rmmod isdn.o
        rmmod slhc.o
        echo "Shutting down isdn4linux"
        $ISDNCTRL delif ippp0
        ;;
*)
        echo "Usage: $0 (start|stop)"
        exit 1
        ;;
esac

I use the following script to dial out, it is called simply isdn on|off


#!/bin/bash
# This is based on an old script from Bernhard Hailer

IP_ADDRESS="195.112.123.11"

case "$1" in
on)
        
        
        echo "Calling ippp0"
        /sbin/isdnctrl dial ippp0
# the sleep is important as it gives the PPP time to settle down
        echo "Sleep for 8s for PPP handshake"
        sleep 8s
        /sbin/route add default ippp0
        echo "line open - checking...."
      
# check whether PPP negotiation was successful:
        set `ping -qc3 -i1 $IP_ADDRESS 2>/dev/null | grep transmitted`
        if [ $4 -gt 0 ];
        then
                echo "succeeded."
                echo "Starting fetchmail daemon"
                /usr/bin/fetchmail -d 600 -k -v -a -L /var/log/fetchmail
                echo "Flushing mail queue...."
                /usr/local/bin/serialmail/maildir2smtp 
                            ~alias/pppdir alias-ppp- mail.server.ip.no `hostname`
        else
                echo "failed!"
                /sbin/isdnctrl hangup ippp0
        fi
        
;;

off)
                echo -n "Shutting down fetchmail daemon"
                /usr/bin/fetchmail --quit
                
                /sbin/isdnctrl hangup ippp0
                /sbin/route del default         # and delete route
                echo "You're off line"
;;

*)
        echo -e "\aUsage:"
        echo "isdn on"
        echo "isdn off"
;;

esac

The next lot is the ipppd options file /etc/ppp/options.ipppd
# Based on:
# Klaus Franken, kfr@suse.de
# Version: 27.08.97 (5.1)
# 
# This file is copy by YaST from /etc/ppp/ioptions.YaST 
#   to options.<device>

user "myuserid"

# my system name (only for CHAP!)
# name my_system_name

# accept IP addresses from peer
# use with dynamic IP
ipcp-accept-local
ipcp-accept-remote
noipdefault

# try to get IP address from interface
# option specific to ipppd (as opposed to pppd)
# use only with static IP
#useifip

# disable all header-compression
-vj
-vjccomp
-ac
-pc
-bsdcomp

# sometimes you need this:
#noccp

# max receive unit
mru 1524
# max transmit unit
mtu 1500

# If this machine is a server, force authentication by uncommenting one
# of the following. However, if this machine is a client, doing this will
# prevent a succesful connection! (message "peer refused to authenticate").
# So, only uncomment on a server.
# "+pap" / "+chap" NUR AKTIVIEREN, WENN DIES EIN SERVER IST!!!
#+pap
#+chap

# if you have problems with handshaking (no response for first
# lcp-package) try to decrease the retry-cycle. Default is 3 sec,
# try for example 2 sec:
# lcp-restart 2


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