Linux : PAM : Pluggable Authentication Module

https://www.redhat.com/sysadmin/pluggable-authentication-modules-pam
https://www.tecmint.com/use-pam_tally2-to-lock-and-unlock-ssh-failed-login-attempts/

sudo pam_tally2 -u 703247699 --reset

Config Files for PAM
/etc/pam.d
/etc/security

sudo   pam_tally2   -u    userID123
---------------------------------------------------------
Login           Failures Latest failure     From
userID123    0

Authorization Basic

https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Authorization

<credentials>

If the "Basic" authentication scheme is used, the credentials are constructed like this:

• The username and the password are combined with a colon (aladdin:opensesame).
• The resulting string is base64 encoded (YWxhZGRpbjpvcGVuc2VzYW1l).

Diagram - SAML - Simple Assertion Mark-up Language

 

https://www.ubisecure.com/wp-content/uploads/2019/06/SAML_flow-768x509.jpg