I use KeyCloak User Federation. Does User Federation support password-free login to LDAP?
Your question is not detailed enough to get a valid answer.
WDYM with “password-free”? No password/credential at all? Some different credential? Where should this credential be stored/come from?
sir，I want to use Kerberos for LDAP User password-free Login by keytab? Is there any feasible solution?
Well, see the Server Admin Guide, there are chapters for LDAP, Kerberos and how to use both.
Thank you ,Sir. It helps me a lot.