pam_mysql: is the database connection encrypted?
I'm interested in using pam_mysql or pam_ldap for authentication with my vsftpd server on CentOS. Does anyone know if, when pam_mysql connects to a remote database, whether or not the connection is, or can be, encrypted with SSL or some other means? While I know that passwords are hashed, I'd rather not have my usernames or my pam-related SQL queries travel in the clear.
If pam_mysql DOES communicate only in the clear, what about pam_ldap? I'm more familiar with LDAP than pam_mysql, and have always secured my conversations with LDAP servers when using an LDAP client or my own LDAP connection libraries.
Thank you for any help you can offer!