Phone Home Script

phonehome.php

<?php
######################################################################
# Phonehome script to obtain IP of home router
# 
# Call with wget from your internal machine
# with the command:
# wget -t 10 http://yourwebsite/phonehome.php?c=1234&cmd=1 -O /dev/null
#
######################################################################
$SY = array();
$SY['CODE']     = " 1234";  // Change to be your code
$SY['IPADDR']   = $_SERVER['REMOTE_ADDR'];
$SY['PCODE']    = 0;        // Code found
$SY['PCMD']     = 0;        // Cmd Found 0 = read  1 = (write)
$SY['FILE']     = 'phonehome.dat';
######################################################################

// Get the code if passed
if ( isset($_GET['c']) ) {
    $SY['PCODE'] = intval ($_GET['c']);
}
if ( isset($_GET['cmd']) ) {
    $SY['PCMD'] = intval($_GET['cmd']);
}

// Compare code we got with what it should be
if ($SY['PCODE'] == $SY['CODE'] ) {
    
    // If cmd = 0 write address we found
    if ($SY['PCMD'] == 0 ) {
        $readval = file($SY['FILE']);
        echo 'Recorded IP is: ' . $readval[0] . '<br/>';
    } else {
        $FP = fopen($SY['FILE'], "w"); 
        if ($FP) {
            fwrite($FP,$SY['IPADDR']);
            fclose($FP);
        }
        echo 'Got it!<br/>';
    }
} else {
    echo 'ERROR, Wrong Access Codes<br/>';
}

######################################################################
# END OF MODULE
######################################################################

Initial version.

Corrected wget command with cmd=1