Mailinglist Archive: opensuse (2441 mails)

[Brad Bendily <brad@xxxxxxxx>]

> > Is there a script/package which can check the external IP on regular
> > basis and send the changes to an email?
> 
> Is the host name consistent?  If so, you can just do a dns lookup.  If
> the host name changes with the IP, then that won't work.  Another
> possibility, is a dynamic dns server, which many firewall/routes can be
> configured to use.

Here's a script that I made that at first I ran every 12 hours at my
house. Until I made the script below that runs hourly.
Also worth noting is that this stuff is running on RedHat 7.x 

#!/bin/sh

FILE2=`echo "/fwlog/ifconfig.txt"`

touch /fwlog/ifconfig.txt
ifconfig eth0 | grep inet | awk -F: '{print $2}' | sed 's/Bcast//' >  /fwlog/ifconfig.txt
mv -f /fwlog/ifconfig.txt $FILE2

cat $FILE2 | mail -s"IP address, ifconfig" email@xxxxxxxxx


I have another script that checks the ip and only sends an email if it's
changed. This may be better for you. This runs hourly.

#!/bin/sh

ifconfig eth0 | grep inet | awk -F: '{print $2}' | sed 's/Bcast//' > 
/etc/fw/ipcheck

I=`cat /etc/fw/ip`
#IP2=`cat /etc/fw/ipcheck`
P=`cat /etc/fw/ipcheck`

#echo "My ip is $IP1"
#echo "My ip is $IP2"

if [ "$I" != "$P" ]; then
       /etc/./ipshow
       /etc/fw/./fw
       rm -rf /etc/fw/ip
       cp /etc/fw/ipcheck /etc/fw/ip

#echo "My ip is $I"
#echo "My ip is $P"

#else
#exit 0
fi