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Shell script to reconnect when PPP / DSL interface goes down

This is a discussion on Shell script to reconnect when PPP / DSL interface goes down within the Shell scripting forums, part of the Development/Scripting category; Hello,, I need script which prompt me when net is dc on my server. regards...


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Old 02-06-2007, 04:12 PM
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Default Shell script to reconnect when PPP / DSL interface goes down

Hello,,
I need script which prompt me when net is dc on my server.
regards
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Old 02-06-2007, 07:07 PM
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What is dc?

How do you connect to Internet?
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Old 02-06-2007, 10:48 PM
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Dc means disconnected.
im using DSL connection
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Old 02-07-2007, 12:54 AM
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You can ping to remote site and if ping failed you can reconnect. For example:
Code:
#!/bin/bash
# add ip / hostname separated by while space 

HOSTS="yourwebsite.com"
# no ping request
COUNT=1

# email report when 
for myHost in $HOSTS
do
  count=$(ping -c $COUNT $myHost | grep 'received' | awk -F',' '{ print $2 }' | awk '{ print $1 }')
  if [ $count -eq 0 ]; then
    # 100% failed 
    # Call script or command below to reconnect 
    # add your command below
  fi
done
Add your command before fi that reconnects DSL
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Old 07-13-2007, 01:37 PM
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Hi,
This is part of script i use:

Code:
#!/bin/bash
#set -x

dnsbroken=`ping -c1nqW5 -s8 www.yahoo.ca 2>&1 | grep -e "unknown" -e "denied" -e "permited"`

if [ -n "$dnsbroken" ]
then

# reconnect the connection
    poff -a
    pon dsl-provider
    sleep 3

fi

# get current ip on ppp0
    x=`/sbin/ifconfig ppp0`
    y=${x#*inet addr:}
    y=${y%% *}

# log current ip
    echo $y > /home/ali/scripts/adsl_ip

exit 0
This is my first quick and dirty script for my pppoe dsl connection
You can run this every 3 - 5 minutes via cron (as root).
You can report the date, time and new ip address of machine as you like.

change the hostname (Yahoo! Canada), log path (/home/ali/scripts/adsl_ip) and your connection name (dsl-provider), then run.
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