Use the LDAPPORT keyword to allow authentication of the
client certificate by an X.500 host. LDAPPORT is used in combination
with LDAPSERVER.
Tip: Do not use this keyword
if TLSMECHANISM is ATTLS. For TLSMECHANISM ATTLS, set TTLSEnvironmentAction
-> TTLSGskAdvancedParms -> TTLSGskLdapParms GSK_LDAP_SERVER_PORT in
the corresponding AT-TLS policy to the LDAP port value.