How to make authorization using a smart card certificate (Smart-card Logon) on the drupal website

Question

PHP

The situation is this, at the moment, users log in to their domain with a smart card certificate (Smart-Card Logon), and then re-authorize (by entering a login password) on the site. It would be desirable to simplify authorization, before authorization only in the domain.
The site was created on cms Drupal 7, works under apache 2.2.
I know in IIS this is possible by changing one setting in web.config. How can this be implemented on this system, maybe someone has already done it?

Answer 1

Try searching for the keywords "NTLM authentication", "Kerberos authentication".
As an example:
val-khmyrov.blogspot.ru/2011_04_01_archive.html
True, such things work within the local network and usually do not go through a proxy, and some of this must be supported by your site (cms).