How can I not use Django's admin login view?

From http://djangosnippets.org/snippets/2127/—wrap the admin login page with login_required. For example, in urls.py:

from django.contrib.auth.decorators import login_required
from django.contrib import admin
admin.autodiscover()
admin.site.login = login_required(admin.site.login)

You probably already have the middle two lines and maybe even the first line; adding that fourth line will cause anything that would have hit the admin.site.login function to redirect to your LOGIN_URL with the appropriate next parameter.

I found that the answer above does not respect the "next" query parameter correctly.

An easy way to solve this problem is to use a simple redirect. In your site's urls file, immediately before including the admin urls, put a line like this:

   url(r'^admin/login$', RedirectView.as_view(pattern_name='my_login_page', permanent=True, query_string=True))

While @Isaac's solution should reject majority of malicious bots, it doesn't provide protection for professional penetrating. As a logged in user gets the following message when trying to login to admin:

We should instead use the admin decorator to reject all non-privileged users:

from django.contrib.admin.views.decorators import staff_member_required
from django.contrib import admin
[ ... ]
admin.site.login = staff_member_required(admin.site.login, login_url=settings.LOGIN_URL)

To the best of my knowledge, the decorator was added in 1.9.