This is an extension for the phpBB forums software. You need an instalation of phpBB 3.1.x to use this.
If a user try to login and the login fails, this extension creates an entry in the user log. Also on the next login the user will see how much logins failed since his last login.
To install this extension download it from here and upload the files in your forum under /ext/tas2580/failedlogins. After that go to the Admin panel of your forum and navigate in to Customise -> Extension Management -> Extensions. Search this extension in the list of extensions and click on Enable.
You can get support for this extension on phpbb.com or in german on phpbb.de. For more informations look at my Website.
If you use the extension in your forum and translated it therefor in your language, it would be nice if you would send me a pull request. Also it may be that existing translations after uptates of the extensions are incomplete. So you can help me if you complete or correct existing language files.