Re: [SLE] automaticaly send an IP change

From: Brad Bendily (brad_at_selu.edu)
Date: 06/14/05

  • Next message: suse_gasjr4wd_at_mac.com: "Re: [SLE] automatically send an IP change" 
    Date: Tue, 14 Jun 2005 10:57:41 -0500 (CDT)
To: suse-linux-e@suse.com

    > > 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@gmail.com

    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 

    -- 
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