I have faced similar issue. When I try to logon to KnoxSSO, it is authenticated correctly and redirected to SSO logon page. After few hours investigation, I have realised that I need to setup ldap configs for my Advanced topology in Knox too. Not just KnoxSSO. I made below changes and I am able to resolve the issue. Under Advanced Topology <param>
<name>main.ldapRealm.userDnTemplate</name>
<value>uid={0},cn=users,cn=accounts,dc=us-west-1,dc=compute,dc=internal</value>
</param>
<param>
<name>main.ldapRealm.contextFactory.url</name>
<value>ldap://xxxxxxxxxxx.us-west-1.compute.internal:389</value>
</param> Under Advanced knoxsso-topology <param>
<name>main.ldapRealm.userDnTemplate</name>
<value>uid={0},cn=users,cn=accounts,dc=us-west-1,dc=compute,dc=internal</value>
</param>
<param>
<name>main.ldapRealm.contextFactory.url</name>
<value>ldap://xxxxxxxxxxx.us-west-1.compute.internal:389</value>
</param>
<param>
<name>knoxsso.redirect.whitelist.regex</name>
<value>.*</value>
</param> And I have ensured the Ambari LDAP setup has the same basedn
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