PAM and LDAP

For SSH, can simply use PAM and configure to use the pam_ldap.so module, pointing at the LDAP port of the YK Authentication Server
Similarly for web apps written in, eg. PHP, Perl, Python etc.
Can also use TCP sockets from most scripting languages such as PHP
Can also use the pam_daemon.so module

For SSH, can simply use PAM and configure to use the pam_ldap.so module, pointing at the LDAP port of the YK Authentication Server