If you would like a external login form for your website you need to go to /config/blesta.php and find: Configure::set("Blesta.csrf_bypass", array());
Edit that Configure::set("Blesta.csrf_bypass", array('client_login::index'));
On your website you need to use one of the following forms and change the URL to your own:
HTML:
<form method="post" action="http://yourdomain.com/blesta_folder/clients/login/">
Username: <input type="text" name="username" value="" id="login_username" /><br />
Password: <input type="password" name="password" value="" id="login_password" /><br />
<input type="submit" name="login" value="Login" class="btn hide_submit" hidefocus="true" />
</form>
Bootstrap Modal:
<!-- Button to trigger modal -->
<li><a href="#login"role="button" data-toggle="modal">Login</a>
<!-- Modal -->
<div id="login" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true"><i class="icon-remove text-error"></i></button>
<h3 id="myModalLabel">Billing Area Login</h3>
</div>
<div class="modal-body">
<p><form method="post" action="http://yourdomain.com/blesta_folder/clients/login/" target="_blank" style="width: 200px;margin: 0 auto 0 auto;">
Username: <input type="text" name="username" value="" id="login_username" /><br />
Password: <input type="password" name="password" value="" id="login_password" /><br />
<input type="submit" name="login" value="Login" class="btn hide_submit" hidefocus="true" />
</form></p>
</div>
<div class="modal-footer">
<button class="btn btn-danger" data-dismiss="modal" aria-hidden="true">Close</button>
</div>
</div>