MikroTik

$cmd = "echo NAS-IP-Address=$nasip,User-Name=$macaddr,Framed-IP-Address=$framedip,Acct-Sess
ion-Id=$sessid | /usr/local/bin/radclient $nasip:1700 disconnect somesecret";
exec($cmd);

#!/usr/local/bin/php -q
<?php

if ($argc != 2 || in_array($argv[1], array('--help', '-help', '-h', '-?'))) {

?>

This will search the radacct table for a mac address and disconnect the user from the appropiate NAS.

   example: <? print $_SERVER['PHP_SELF']; ?> 00:00:00:00:00:00

<?php
} else {
        $macaddr = $argv[1];

// Let's try and connect up to the database....
$link = mysql_connect("localhost", "dbusername", "dbpassword");
if (!$link) {
    die('Could not connect: ' . mysql_error());
    echo 'Error connecting to mysql';
}
mysql_select_db("database") or die(mysql_error());

        $query = "SELECT *  FROM `radacct` WHERE `UserName` LIKE '$macaddr' ORDER BY `RadAcctId` DESC LIMIT 0,1";
        $result=mysql_query($query);
        $num=mysql_numrows($result);
//Close out mysql connection!
mysql_close($link);

$i=0;
while ($i < $num) {
        //All our variables from our query.
        $RadAcctId=mysql_result($result,$i,"RadAcctId");
        $AcctSessionId=mysql_result($result,$i,"AcctSessionId");
        $AcctUniqueId=mysql_result($result,$i,"AcctUniqueId");
        $UserName=mysql_result($result,$i,"UserName");
        $Realm=mysql_result($result,$i,"Realm");
        $NASIPAddress=mysql_result($result,$i,"NASIPAddress");
        $NASPortId=mysql_result($result,$i,"NASPortId");
        $AcctStartTime=mysql_result($result,$i,"AcctStartTime");
        $AcctStopTime=mysql_result($result,$i,"AcctStopTime");
        $AcctSessionTime=mysql_result($result,$i,"AcctSessionTime");
        $AcctAuthentic=mysql_result($result,$i,"AcctAuthentic");
        $ConnectInfo_start=mysql_result($result,$i,"ConnectInfo_start");
        $ConnectInfo_stop=mysql_result($result,$i,"ConnectInfo_stop");
        $AcctInputOctets=mysql_result($result,$i,"AcctInputOctets");
        $AcctOutputOctets=mysql_result($result,$i,"AcctOutputOctets");
        $CalledStationId=mysql_result($result,$i,"CalledStationId");
        $CallingStationId=mysql_result($result,$i,"CallingStationId");
        $AcctTerminateCause=mysql_result($result,$i,"AcctTerminateCause");
        $ServiceType=mysql_result($result,$i,"ServiceType");
        $FramedProtocol=mysql_result($result,$i,"FramedProtocol");
        $FramedIPAddress=mysql_result($result,$i,"FramedIPAddress");
        $AcctStartDelay=mysql_result($result,$i,"AcctStartDelay");
        $AcctStopDelay=mysql_result($result,$i,"AcctStopDelay");

// The 4 lines below are commented out as they were for debugging.
//  echo "Username: $UserName\n";
//  echo "Client IP: $FramedIPAddress\n";
//  echo "NAS IP Address: $NASIPAddress\n";
//  echo "AcctSessionId: $AcctSessionId\n";

        // This is the command we will pass on for php to execute
        $cmd = "echo NAS-IP-Address=$NASIPAddress,User-Name=$UserName,Framed-IP-Address=$FramedIPAddress,Acct-Session-Id=$AcctSessionId | /usr/local/bin/radclient $NASIPAddress:1700 disconnect SomeSecret";
        // Let's actually execute the command now
        exec($cmd);
        $i++;
        }
}
?>