netbox/netbox/templates/404.html

{% extends '_base.html' %}

{% block content %}
<div class="row" style="margin-top: 150px;">
    <div class="col-sm-4 col-sm-offset-4">
        <div class="panel panel-default">
            <div class="panel-heading">
                <strong><i class="glyphicon glyphicon-warning-sign"></i> Page Not Found</strong>
            </div>
            <div class="panel-body">
                The requested page does not exist.
            </div>
            <div class="panel-footer text-right">
                <a href="{% url 'home' %}" class="btn btn-xs btn-primary">Home Page</a>
            </div>
        </div>
    </div>
</div>
{% endblock %}