This is the optional name to use to authenticate this Radiator server to the LDAP server. You only need to specify this if the LDAP server requires authentication from its clients. AuthBy LDAP2 supports %0 as a special for DN escaped currently authenticated user name.

Here is an example of using AuthDN:

# Log in to LDAP as admin. You man need a DN formatted name.
# AuthDN admin
AuthDN cn=admin,dc=example,dc=com