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daf666

Member

Registered: 2007-04-08

Posts: 470

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Cable Modem PPTP connection to ISP and keep alive bash script

Hi All,

I have created a new script for connecting to my ISP and then keep it alive (it runs on my Arch router), I will be happy to hear comments and suggestions, enjoy.

Note: This script uses the tcping utility (http://www.linuxco.de/tcping/tcping.html)

Replace USER with your ISP username
Replace DOMAIN with your PNS domain name
Replace DNS IP's with the ones of your ISP

#!/bin/bash

cable_connect()
{
  /etc/rc.d/network restart
  sleep 1
  logger "Cable_connect: settings vars..."
  USERNAME=USER
  CABLEGW=`/sbin/route -n | grep ^0.0.0.0 | awk '{print $2}'`
  PNS=`host DOMAIN | awk '{print $4}' | tail -1`
  sleep 1

  logger "Cable_connect: fixing routes..."
  /sbin/route add -host $PNS gw $CABLEGW
  sleep 1
  /sbin/route del default
  sleep 1

  logger "Cable_connect: connecting..."
  /usr/sbin/pptp $PNS user $USERNAME mtu 1460 mru 1460 defaultroute usepeerdns noauth
  sleep 1
  echo "nameserver 192.11.216.31" > /etc/resolv.conf
  echo "nameserver 192.11.24.4" >> /etc/resolv.conf
  echo "nameserver 194.9.1.55" >> /etc/resolv.conf
}

logger "Cable_connect: Connecting..."
cable_connect

while [ 1 ]
do
  logger "Cable_connect: Sleeping..."
  sleep 300
  logger "Cable_connect: Testing connectivity..."    
  if tcping -q -t 10 www.google.com 80 ;then
    logger "Cable_connect: Connection is alive."
  else
    logger "Cable_connect: Connection Failure, reconnecting..."
    cable_connect
  fi
done

Last edited by daf666 (2008-02-29 15:59:20)