Hi all the list.
I have added IPSec restart in the script, because it seems not to work well without it
at each time.
Sorry !
Now, it seems to be ok.
#!/bin/sh
#
# Check a regular interval defined in /etc/crontab that IP exists for IFACE
# and that IP has not changed
# this is obtained by scanning "ip addr show $IFACE" return (function getip()).
# If IFACE is down or IP has changed, then a script can be executed.
# Return to correct defaultroute if IPSEc user lost ISP link.
# Adapted by J. Nilo from a script by T. Nkaoua
# Defaultroute switching survey feature added by F6HQZ Francois BERGERET
# (tks to J.Nilo and T.Nkaoua)
IFACE=ppp0
FILE=/tmp/checkip
getip() {
IP=`ip addr show $IFACE | grep inet | cut -f1 -d"p" | cut -f2 -d"t" | cut -f1
-d"/"`
}
getgate() {
GATE=`ip addr show $IFACE | grep inet | cut -f1 -d"/" | cut -f2 -d"r" | cut
-f1 -d"/"`
}
getdefroute() {
DEFROUTE=`ip route | grep default | cut -f3 -d"v"`
}
if [ -f $FILE ]; then
read OLDIP < $FILE
else
getip
echo $IP > $FILE
exit
fi
getip
echo $IP > $FILE
getgate
getdefroute
if ! [ "$IP" ]; then
logger "checkip: Checkip connection broken detection"
#
# Put any command here that you want to activate if IFACE is down
#
exit
fi
if [ $DEFROUTE != $IFACE ]; then
logger checkip: IP:$IP GATE:$GATE DEFAULTROUTE:$DEFROUTE
logger checkip: WARNING: defaultroute was $DEFROUTE
logger checkip: ip route del default
ip route del default
logger checkip: ip route add default via $GATE dev $IFACE
ip route add default via $GATE dev $IFACE
logger checkip: ipsec restart
ipsec setup --restart
exit
fi
if [ $OLDIP != $IP ]; then
logger checkip: IP has changed for $IFACE: new IP is $IP - old IP was $OLDIP
#
# Put any command here that you want to activate if IP has changed
#
logger checkip: ip route del default
logger checkip: ip route add default via $GATE dev $IFACE
ip route del default
ip route add default via $GATE dev $IFACE
fi
#------------------------ FILE END -----------------------------------
Instructions to install checkip.dat :
Copy this file to :
/usr/sbin/checkip.dat
chmod 755 checkip.dat
Edit /etc/cron.d/multicron and add a new line :
*/1 * * * * root /usr/sbin/checkip.dat
Backup root.lrp
And enjoy with Bering running 24/24 without any interruption due to ISP link cutted !
Best Regards,
Francois BERGERET,
France.
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