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LoginLockdown

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Richy 2017-08-22 14:40:56 +02:00 • committed by Thibault Richy
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pole-sbv-content/plugins/login-lockdown/license.txt Normal file
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
675 Mass Ave, Cambridge, MA 02139, USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
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General Public License applies to most of the Free Software
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NO WARRANTY
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END OF TERMS AND CONDITIONS

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<?php
/*
Plugin Name: Login LockDown
Plugin URI: http://www.bad-neighborhood.com/
Version: v1.7.1
Author: Michael VanDeMar
Description: Adds some extra security to WordPress by restricting the rate at which failed logins can be re-attempted from a given IP range. Distributed through <a href="http://www.bad-neighborhood.com/" target="_blank">Bad Neighborhood</a>.
*/
/*
== Change Log ==
*
* ver. 1.7.1 13-Sep-2016
* - fixed bug causing all ipv6 addresses to get locked out if 1 was
* - added in WordPress MultiSite functionality
* - fixed bug where subnets could be overly matched, causing more IPs to be blocked than intended
* - moved the report for locked out IP addresses to its own tab
*
* ver. 1.6.1 8-Mar-2014
* - fixed html glitch preventing options from being saved
*
* ver. 1.6 7-Mar-2014
* - cleaned up deprecated functions
* - fixed bug with invalid property on a non-object when locking out invalid usernames
* - fixed utilization of $wpdb->prepare
* - added more descriptive help text to each of the options
* - added the ability to remove the "Login form protected by Login LockDown." message from within the dashboard
*
* ver. 1.5 17-Sep-2009
* - implemented wp_nonce security in the options and lockdown release forms in the admin screen
* - fixed a security hole with an improperly escaped SQL query
* - encoded certain outputs in the admin panel using esc_attr() to prevent XSS attacks
* - fixed an issue with the 'Lockout Invalid Usernames' option not functioning as intended
*
* ver. 1.4 29-Aug-2009
* - removed erroneous error affecting WP 2.8+
* - fixed activation error caused by customizing the location of the wp-content folder
* - added in the option to mask which specific login error (invalid username or invalid password) was generated
* - added in the option to lock out failed login attempts even if the username doesn't exist
*
* ver. 1.3 23-Feb-2009
* - adjusted positioning of plugin byline
* - allowed for dynamic location of plugin files
*
* ver. 1.2 15-Jun-2008
* - now compatible with WordPress 2.5 and up only
*
* ver. 1.1 01-Sep-2007
* - revised time query to MySQL 4.0 compatability
*
* ver. 1.0 29-Aug-2007
* - released
*/
/*
== Installation ==
1. Extract the zip file into your plugins directory into its own folder.
2. Activate the plugin in the Plugin options.
3. Customize the settings from the Options panel, if desired.
*/
/*
/--------------------------------------------------------------------\
| |
| License: GPL |
| |
| Login LockDown - added security measures to WordPress intended to |
| inhibit or reduce brute force password discovery. |
| Copyright (C) 2007 - 2014, Michael VanDeMar, |
| http://www.bad-neighborhood.com |
| All rights reserved. |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License |
| as published by the Free Software Foundation; either version 2 |
| of the License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the |
| Free Software Foundation, Inc. |
| 51 Franklin Street, Fifth Floor |
| Boston, MA 02110-1301, USA |
| |
\--------------------------------------------------------------------/
*/
$loginlockdown_db_version = "1.0";
$loginlockdownOptions = get_loginlockdownOptions();
function loginLockdown_install() {
global $wpdb;
global $loginlockdown_db_version;
$table_name = $wpdb->prefix . "login_fails";
if( $wpdb->get_var("SHOW TABLES LIKE '$table_name'") != $table_name ) {
$sql = "CREATE TABLE " . $table_name . " (
`login_attempt_ID` bigint(20) NOT NULL AUTO_INCREMENT,
`user_id` bigint(20) NOT NULL,
`login_attempt_date` datetime NOT NULL default '0000-00-00 00:00:00',
`login_attempt_IP` varchar(100) NOT NULL default '',
PRIMARY KEY (`login_attempt_ID`)
);";
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
dbDelta($sql);
}
$table_name = $wpdb->prefix . "lockdowns";
if( $wpdb->get_var("SHOW TABLES LIKE '$table_name'") != $table_name ) {
$sql = "CREATE TABLE " . $table_name . " (
`lockdown_ID` bigint(20) NOT NULL AUTO_INCREMENT,
`user_id` bigint(20) NOT NULL,
`lockdown_date` datetime NOT NULL default '0000-00-00 00:00:00',
`release_date` datetime NOT NULL default '0000-00-00 00:00:00',
`lockdown_IP` varchar(100) NOT NULL default '',
PRIMARY KEY (`lockdown_ID`)
);";
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
dbDelta($sql);
}
add_option("loginlockdown_db_version", "1.0", "", "no");
// added in 1.6, cleanup from previously improperly set db versions
delete_option( "loginlockdown_db1_version" );
delete_option( "loginlockdown_db2_version" );
}
function countFails($username = "") {
global $wpdb;
global $loginlockdownOptions;
$table_name = $wpdb->prefix . "login_fails";
$subnet = calc_subnet($_SERVER['REMOTE_ADDR']);
$numFailsquery = "SELECT COUNT(login_attempt_ID) FROM $table_name " .
"WHERE login_attempt_date + INTERVAL " .
$loginlockdownOptions['retries_within'] . " MINUTE > now() AND " .
"login_attempt_IP LIKE '%s'";
$numFailsquery = $wpdb->prepare( $numFailsquery, $subnet[1] . "%");
$numFails = $wpdb->get_var($numFailsquery);
return $numFails;
}
function incrementFails($username = "") {
global $wpdb;
global $loginlockdownOptions;
$table_name = $wpdb->prefix . "login_fails";
$subnet = calc_subnet($_SERVER['REMOTE_ADDR']);
$username = sanitize_user($username);
$user = get_user_by('login',$username);
if ( $user || "yes" == $loginlockdownOptions['lockout_invalid_usernames'] ) {
if ( $user === false ) {
$user_id = -1;
} else {
$user_id = $user->ID;
}
$insert = "INSERT INTO " . $table_name . " (user_id, login_attempt_date, login_attempt_IP) " .
"VALUES ('" . $user_id . "', now(), '%s')";
$insert = $wpdb->prepare( $insert, $subnet[0] );
$results = $wpdb->query($insert);
}
}
function lockDown($username = "") {
global $wpdb;
global $loginlockdownOptions;
$table_name = $wpdb->prefix . "lockdowns";
$subnet = calc_subnet($_SERVER['REMOTE_ADDR']);
$username = sanitize_user($username);
$user = get_user_by('login',$username);
if ( $user || "yes" == $loginlockdownOptions['lockout_invalid_usernames'] ) {
if ( $user === false ) {
$user_id = -1;
} else {
$user_id = $user->ID;
}
$insert = "INSERT INTO " . $table_name . " (user_id, lockdown_date, release_date, lockdown_IP) " .
"VALUES ('" . $user_id . "', now(), date_add(now(), INTERVAL " .
$loginlockdownOptions['lockout_length'] . " MINUTE), '%s')";
$insert = $wpdb->prepare( $insert, $subnet[0] );
$results = $wpdb->query($insert);
}
}
function isLockedDown() {
global $wpdb;
$table_name = $wpdb->prefix . "lockdowns";
$subnet = calc_subnet($_SERVER['REMOTE_ADDR']);
$stillLockedquery = "SELECT user_id FROM $table_name " .
"WHERE release_date > now() AND " .
"lockdown_IP LIKE %s";
$stillLockedquery = $wpdb->prepare($stillLockedquery,$subnet[1] . "%");
$stillLocked = $wpdb->get_var($stillLockedquery);
return $stillLocked;
}
function listLockedDown() {
global $wpdb;
$table_name = $wpdb->prefix . "lockdowns";
$listLocked = $wpdb->get_results("SELECT lockdown_ID, floor((UNIX_TIMESTAMP(release_date)-UNIX_TIMESTAMP(now()))/60) AS minutes_left, ".
"lockdown_IP FROM $table_name WHERE release_date > now()", ARRAY_A);
return $listLocked;
}
function get_loginlockdownOptions() {
$loginlockdownAdminOptions = array(
'max_login_retries' => 3,
'retries_within' => 5,
'lockout_length' => 60,
'lockout_invalid_usernames' => 'no',
'mask_login_errors' => 'no',
'show_credit_link' => 'yes'
);
$loginlockdownOptions = get_option("loginlockdownAdminOptions");
if ( !empty($loginlockdownOptions) ) {
foreach ( $loginlockdownOptions as $key => $option ) {
$loginlockdownAdminOptions[$key] = $option;
}
}
update_option("loginlockdownAdminOptions", $loginlockdownAdminOptions);
return $loginlockdownAdminOptions;
}
function calc_subnet($ip) {
$subnet[0] = $ip;
if (!filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false) {
$ip = expandipv6($ip);
preg_match("/^([0-9abcdef]{1,4}:){4}/", $ip, $matches);
$subnet[0] = $ip;
$subnet[1] = $matches[0];
} else {
$subnet[1] = substr ($ip, 0 , strrpos ( $ip, "." ) + 1);
}
return $subnet;
}
function expandipv6($ip){
$hex = unpack("H*hex", inet_pton($ip));
$ip = substr(preg_replace("/([A-f0-9]{4})/", "$1:", $hex['hex']), 0, -1);
return $ip;
}
function print_loginlockdownAdminPage() {
global $wpdb;
$table_name = $wpdb->prefix . "lockdowns";
$loginlockdownAdminOptions = get_loginlockdownOptions();
if (isset($_POST['update_loginlockdownSettings'])) {
//wp_nonce check
check_admin_referer('login-lockdown_update-options');
if (isset($_POST['ll_max_login_retries'])) {
$loginlockdownAdminOptions['max_login_retries'] = $_POST['ll_max_login_retries'];
}
if (isset($_POST['ll_retries_within'])) {
$loginlockdownAdminOptions['retries_within'] = $_POST['ll_retries_within'];
}
if (isset($_POST['ll_lockout_length'])) {
$loginlockdownAdminOptions['lockout_length'] = $_POST['ll_lockout_length'];
}
if (isset($_POST['ll_lockout_invalid_usernames'])) {
$loginlockdownAdminOptions['lockout_invalid_usernames'] = $_POST['ll_lockout_invalid_usernames'];
}
if (isset($_POST['ll_mask_login_errors'])) {
$loginlockdownAdminOptions['mask_login_errors'] = $_POST['ll_mask_login_errors'];
}
if (isset($_POST['ll_show_credit_link'])) {
$loginlockdownAdminOptions['show_credit_link'] = $_POST['ll_show_credit_link'];
}
update_option("loginlockdownAdminOptions", $loginlockdownAdminOptions);
?>
<div class="updated"><p><strong><?php _e("Settings Updated.", "loginlockdown");?></strong></p></div>
<?php
}
if (isset($_POST['release_lockdowns'])) {
//wp_nonce check
check_admin_referer('login-lockdown_release-lockdowns');
if (isset($_POST['releaseme'])) {
$released = $_POST['releaseme'];
foreach ( $released as $release_id ) {
$releasequery = "UPDATE $table_name SET release_date = now() " .
"WHERE lockdown_ID = '%d'";
$releasequery = $wpdb->prepare($releasequery,$release_id);
$results = $wpdb->query($releasequery);
}
}
update_option("loginlockdownAdminOptions", $loginlockdownAdminOptions);
?>
<div class="updated"><p><strong><?php _e("Lockdowns Released.", "loginlockdown");?></strong></p></div>
<?php
}
$dalist = listLockedDown();
?>
<div class="wrap">
<?php
$active_tab = isset( $_GET[ 'tab' ] ) ? $_GET[ 'tab' ] : 'settings';
?>
<h2><?php _e('Login LockDown Options', 'loginlockdown') ?></h2>
<h2 class="nav-tab-wrapper">
<a href="?page=loginlockdown.php&tab=settings" class="nav-tab <?php echo $active_tab == 'settings' ? 'nav-tab-active' : ''; ?>">Settings</a>
<a href="?page=loginlockdown.php&tab=activity" class="nav-tab <?php echo $active_tab == 'activity' ? 'nav-tab-active' : ''; ?>">Activity (<?php echo count($dalist); ?>)</a>
</h2>
<?php if ( $active_tab == 'settings' ) { ?>
<form method="post" action="<?php echo esc_attr($_SERVER["REQUEST_URI"]); ?>">
<?php
if ( function_exists('wp_nonce_field') )
wp_nonce_field('login-lockdown_update-options');
?>
<h3><?php _e('Max Login Retries', 'loginlockdown') ?></h3>
<p>Number of failed login attempts within the "Retry Time Period Restriction" (defined below) needed to trigger a LockDown.</p>
<p><input type="text" name="ll_max_login_retries" size="8" value="<?php echo esc_attr($loginlockdownAdminOptions['max_login_retries']); ?>"></p>
<h3><?php _e('Retry Time Period Restriction (minutes)', 'loginlockdown') ?></h3>
<p>Amount of time that determines the rate at which failed login attempts are allowed before a LockDown occurs.</p>
<p><input type="text" name="ll_retries_within" size="8" value="<?php echo esc_attr($loginlockdownAdminOptions['retries_within']); ?>"></p>
<h3><?php _e('Lockout Length (minutes)', 'loginlockdown') ?></h3>
<p>How long a particular IP block will be locked out for once a LockDown has been triggered.</p>
<p><input type="text" name="ll_lockout_length" size="8" value="<?php echo esc_attr($loginlockdownAdminOptions['lockout_length']); ?>"></p>
<h3><?php _e('Lockout Invalid Usernames?', 'loginlockdown') ?></h3>
<p>By default Login LockDown will not trigger if an attempt is made to log in using a username that does not exist. You can override this behavior here.</p>
<p><input type="radio" name="ll_lockout_invalid_usernames" value="yes" <?php if( $loginlockdownAdminOptions['lockout_invalid_usernames'] == "yes" ) echo "checked"; ?>>&nbsp;Yes&nbsp;&nbsp;&nbsp;<input type="radio" name="ll_lockout_invalid_usernames" value="no" <?php if( $loginlockdownAdminOptions['lockout_invalid_usernames'] == "no" ) echo "checked"; ?>>&nbsp;No</p>
<h3><?php _e('Mask Login Errors?', 'loginlockdown') ?></h3>
<p>WordPress will normally display distinct messages to the user depending on whether they try and log in with an invalid username, or with a
valid username but the incorrect password. Toggling this option will hide why the login failed.</p>
<p><input type="radio" name="ll_mask_login_errors" value="yes" <?php if( $loginlockdownAdminOptions['mask_login_errors'] == "yes" ) echo "checked"; ?>>&nbsp;Yes&nbsp;&nbsp;&nbsp;<input type="radio" name="ll_mask_login_errors" value="no" <?php if( $loginlockdownAdminOptions['mask_login_errors'] == "no" ) echo "checked"; ?>>&nbsp;No</p>
<h3><?php _e('Show Credit Link?', 'loginlockdown') ?></h3>
<p>By default, Login LockDown will display the following message on the login form:<br />
<blockquote>Login form protected by <a href='http://www.bad-neighborhood.com/login-lockdown.html'>Login LockDown</a>.</blockquote>
This helps others know about the plugin so they can protect their blogs as well if they like. However, you can disable this message if you prefer.</p>
<input type="radio" name="ll_show_credit_link" value="yes" <?php if( $loginlockdownAdminOptions['show_credit_link'] == "yes" || $loginlockdownAdminOptions['show_credit_link'] == "" ) echo "checked"; ?>>&nbsp;Yes, display the credit link.<br />
<input type="radio" name="ll_show_credit_link" value="shownofollow" <?php if( $loginlockdownAdminOptions['show_credit_link'] == "shownofollow" ) echo "checked"; ?>>&nbsp;Display the credit link, but add "rel='nofollow'" (ie. do not pass any link juice).<br />
<input type="radio" name="ll_show_credit_link" value="no" <?php if( $loginlockdownAdminOptions['show_credit_link'] == "no" ) echo "checked"; ?>>&nbsp;No, do not display the credit link.<br />
<div class="submit">
<input type="submit" class="button button-primary" name="update_loginlockdownSettings" value="<?php _e('Update Settings', 'loginlockdown') ?>" /></div>
</form>
<?php } else { ?>
<form method="post" action="<?php echo esc_attr($_SERVER["REQUEST_URI"]); ?>">
<?php
if ( function_exists('wp_nonce_field') )
wp_nonce_field('login-lockdown_release-lockdowns');
?>
<h3><?php
if( count($dalist) == 1 ) {
printf( esc_html__( 'There is currently %d locked out IP address.', 'loginlockdown' ), count($dalist) );
} else {
printf( esc_html__( 'There are currently %d locked out IP addresses.', 'loginlockdown' ), count($dalist) );
} ?></h3>
<?php
$num_lockedout = count($dalist);
if( 0 == $num_lockedout ) {
echo "<p>No IP blocks currently locked out.</p>";
} else {
foreach ( $dalist as $key => $option ) {
?>
<li><input type="checkbox" name="releaseme[]" value="<?php echo esc_attr($option['lockdown_ID']); ?>"> <?php echo esc_attr($option['lockdown_IP']); ?> (<?php echo esc_attr($option['minutes_left']); ?> minutes left)</li>
<?php
}
}
?>
<div class="submit">
<input type="submit" class="button button-primary" name="release_lockdowns" value="<?php _e('Release Selected', 'loginlockdown') ?>" /></div>
</form>
<?php } ?>
</div>
<?php
}//End function print_loginlockdownAdminPage()
function loginlockdown_ap() {
if ( function_exists('add_options_page') ) {
add_options_page('Login LockDown', 'Login LockDown', 'manage_options', basename(__FILE__), 'print_loginlockdownAdminPage');
}
}
function ll_credit_link(){
global $loginlockdownOptions;
$thispage = "http://" . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"];
$homepage = get_option( "home" );
$showcreditlink = $loginlockdownOptions['show_credit_link'];
$relnofollow = "rel='nofollow'";
if ( $showcreditlink != "shownofollow" && ($thispage == $homepage || $thispage == $homepage . "/" || substr($_SERVER["REQUEST_URI"], strlen($_SERVER["REQUEST_URI"]) - 12) == "wp-login.php") ) {
$relnofollow = "";
}
if ( $showcreditlink != "no" ) {
echo "<p>Login form protected by <a href='http://www.bad-neighborhood.com/login-lockdown.html' $relnofollow>Login LockDown</a>.<br /><br /><br /></p>";
}
}
//Actions and Filters
if ( isset($loginlockdown_db_version) ) {
//Actions
add_action('admin_menu', 'loginlockdown_ap');
if(!defined('WP_PLUGIN_DIR')){
define('WP_PLUGIN_DIR', ABSPATH . 'wp-content/plugins');
}
$activatestr = str_replace(WP_PLUGIN_DIR . "/", "activate_", __FILE__);
add_action($activatestr, 'loginLockdown_install');
add_action('login_form', 'll_credit_link');
remove_filter('authenticate', 'wp_authenticate_username_password', 20, 3);
add_filter('authenticate', 'll_wp_authenticate_username_password', 20, 3);
//Filters
//Functions
function ll_wp_authenticate_username_password($user, $username, $password) {
if ( is_a($user, 'WP_User') ) { return $user; }
if ( empty($username) || empty($password) ) {
$error = new WP_Error();
if ( empty($username) )
$error->add('empty_username', __('<strong>ERROR</strong>: The username field is empty.'));
if ( empty($password) )
$error->add('empty_password', __('<strong>ERROR</strong>: The password field is empty.'));
return $error;
}
$userdata = get_user_by('login',$username);
if ( !$userdata ) {
return new WP_Error('invalid_username', sprintf(__('<strong>ERROR</strong>: Invalid username. <a href="%s" title="Password Lost and Found">Lost your password</a>?'), site_url('wp-login.php?action=lostpassword', 'login')));
}
$userdata = apply_filters('wp_authenticate_user', $userdata, $password);
if ( is_wp_error($userdata) ) {
return $userdata;
}
if ( !wp_check_password($password, $userdata->user_pass, $userdata->ID) ) {
return new WP_Error('incorrect_password', sprintf(__('<strong>ERROR</strong>: Incorrect password. <a href="%s" title="Password Lost and Found">Lost your password</a>?'), site_url('wp-login.php?action=lostpassword', 'login')));
}
$user = new WP_User($userdata->ID);
return $user;
}
if ( !function_exists('wp_authenticate') ) :
function wp_authenticate($username, $password) {
global $wpdb, $error;
global $loginlockdownOptions;
$username = sanitize_user($username);
$password = trim($password);
if ( "" != isLockedDown() ) {
return new WP_Error('incorrect_password', "<strong>ERROR</strong>: We're sorry, but this IP range has been blocked due to too many recent " .
"failed login attempts.<br /><br />Please try again later.");
}
$user = apply_filters('authenticate', null, $username, $password);
if ( $user == null ) {
// TODO what should the error message be? (Or would these even happen?)
// Only needed if all authentication handlers fail to return anything.
$user = new WP_Error('authentication_failed', __('<strong>ERROR</strong>: Invalid username or incorrect password.'));
}
$ignore_codes = array('empty_username', 'empty_password');
if (is_wp_error($user) && !in_array($user->get_error_code(), $ignore_codes) ) {
incrementFails($username);
if ( $loginlockdownOptions['max_login_retries'] <= countFails($username) ) {
lockDown($username);
return new WP_Error('incorrect_password', __("<strong>ERROR</strong>: We're sorry, but this IP range has been blocked due to too many recent " .
"failed login attempts.<br /><br />Please try again later."));
}
if ( 'yes' == $loginlockdownOptions['mask_login_errors'] ) {
return new WP_Error('authentication_failed', sprintf(__('<strong>ERROR</strong>: Invalid username or incorrect password. <a href="%s" title="Password Lost and Found">Lost your password</a>?'), site_url('wp-login.php?action=lostpassword', 'login')));
} else {
do_action('wp_login_failed', $username);
}
}
return $user;
}
endif;
// multisite network-wide activation
register_activation_hook( __FILE__, 'loginlockdown_multisite_activate' );
function loginlockdown_multisite_activate($networkwide) {
global $wpdb;
if (function_exists('is_multisite') && is_multisite()) {
// check if it is a network activation - if so, run the activation function for each blog id
if ($networkwide) {
$old_blog = $wpdb->blogid;
// Get all blog ids
$blogids = $wpdb->get_col("SELECT blog_id FROM $wpdb->blogs");
foreach ($blogids as $blog_id) {
switch_to_blog($blog_id);
loginLockdown_install();
}
switch_to_blog($old_blog);
return;
}
}
}
// multisite new site activation
add_action( 'wpmu_new_blog', 'loginlockdown_multisite_newsite', 10, 6);
function loginlockdown_multisite_newsite($blog_id, $user_id, $domain, $path, $site_id, $meta ) {
global $wpdb;
if (is_plugin_active_for_network('loginlockdown/loginlockdown.php')) {
$old_blog = $wpdb->blogid;
switch_to_blog($blog_id);
loginLockdown_install();
switch_to_blog($old_blog);
}
}
// multisite old sites check
add_action('admin_init','loginlockdown_multisite_legacy');
function loginlockdown_multisite_legacy() {
$loginlockdownMSRunOnce = get_option("loginlockdownmsrunonce");
if ( empty($loginlockdownMSRunOnce) ) {
global $wpdb;
if (function_exists('is_multisite') && is_multisite()) {
$old_blog = $wpdb->blogid;
// Get all blog ids
$blogids = $wpdb->get_col("SELECT blog_id FROM $wpdb->blogs");
foreach ($blogids as $blog_id) {
// check if already exists
$bed_check = $wpdb->query("SHOW TABLES LIKE '{$wpdb->base_prefix}{$blog_id}_login_fails'");
if (!$bed_check) {
switch_to_blog($blog_id);
loginLockdown_install();
}
}
switch_to_blog($old_blog);
}
add_option("loginlockdownmsrunonce", "done", "", "no");
return;
}
}
}

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=== Login LockDown ===
Developer: Michael VanDeMar (michael@endlesspoetry.com)
Tags: security, login
Requires at least: 3.6
Tested up to: 4.6.1
Stable Tag: 1.7.1
Limits the number of login attempts from a given IP range within a certain time period.
== Description ==
Login LockDown records the IP address and timestamp of every failed login attempt. If more than a
certain number of attempts are detected within a short period of time from the same
IP range, then the login function is disabled for all requests from that range.
This helps to prevent brute force password discovery. Currently the plugin defaults
to a 1 hour lock out of an IP block after 3 failed login attempts within 5 minutes. This can be modified
via the Options panel. Administrators can release locked out IP ranges manually from the panel.
== Installation ==
1. Extract the zip file into your plugins directory into its own folder.
2. Activate the plugin in the Plugin options.
3. Customize the settings from the Options panel, if desired.
Enjoy.
== Change Log ==
ver. 1.7.1 13-Sep-2016
- fixed bug causing all ipv6 addresses to get locked out if 1 was
- added in WordPress MultiSite functionality
- fixed bug where subnets could be overly matched, causing more IPs to be blocked than intended
- moved the report for locked out IP addresses to its own tab
ver. 1.6.1 8-Mar-2014
- fixed html glitch preventing options from being saved
ver. 1.6 7-Mar-2014
- cleaned up deprecated functions
- fixed bug with invalid property on a non-object when locking out invalid usernames
- fixed utilization of $wpdb->prepare
- added more descriptive help text to each of the options
- added the ability to remove the "Login form protected by Login LockDown." message from within the dashboard
ver. 1.5 17-Sep-2009
- implemented wp_nonce security in the options and lockdown release forms in the admin screen
- fixed a security hole with an improperly escaped SQL query
- encoded certain outputs in the admin panel using esc_attr() to prevent XSS attacks
- fixed an issue with the 'Lockout Invalid Usernames' option not functioning as intended
ver. 1.4 29-Aug-2009
- removed erroneous error affecting WP 2.8+
- fixed activation error caused by customizing the location of the wp-content folder
- added in the option to mask which specific login error (invalid username or invalid password) was generated
- added in the option to lock out failed login attempts even if the username doesn't exist
ver. 1.3 23-Feb-2009
- adjusted positioning of plugin byline
- allowed for dynamic location of plugin files
ver. 1.2 15-Jun-2008
- now compatible with WordPress 2.5 and up only
ver. 1.1 01-Sep-2007
- revised time query to MySQL 4.0 compatability
ver. 1.0 29-Aug-2007
- released

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1.7.1