[Andreas]

You might try this:

[sql]
CREATE TABLE iplog (userid int(10) unsigned NOT NULL, ipaddress varchar(16) NOT NULL, dateline int(10) unsigned NOT NULL, PRIMARY KEY (userid), UNIQUE KEY userip (userid, ipaddress));
[/sql]
Note: If you are using a table prefix you must add it here in front of iplog.


In sessions.php FIND

PHP Code:

  $sessioncreated = true;

  return $session; 


REPLACE that with

PHP Code:

$sessioncreated = true;
if ($session[userid]) {   
  $DB_site->query("REPLACE INTO " . TABLE_PREFIX . "iplog SET userid=$session[userid], ipaddress='$session[host]', dateline=" . TIMENOW);
}

return $session; 


This will create or update records in table iplog whenever a new session is created. To view this log you can use the attached ACP-Script.

If you want, you can also add a link in the ACP menu:

In admincp/index.php FIND

PHP Code:

construct_nav_option($vbphrase['search_ip_addresses'], 'usertools.php?do=doips', '<br />'); 


BELOW that ADD

PHP Code:

construct_nav_option('IP Log', 'iplog.php?do=searchuser', '<br />'); 


To keep this simple i've not used phrases, so please forgive me

Keep in mind that this adds a query whenever a new user session is created and the table iplog will get BIG.