mod_auth_pam
PAM stands for Pluggable Authentication Modules,
and is used to configure ways for authenticating users. Now
"authenticating" a user usually means comparing a password they
give with some other information, and returning a "yes/no"-style
answer. PAM does not provide all of the other information for a user,
such as UID, GID, home, and shell. This means that mod_auth_pam
cannot be used, by itself, as an auth module for proftpd;
mod_auth_pam is used to supplement other auth modules by
providing access to PAM's additional authentication checks.
Installation instructions for mod_auth_pam<