A fast question about kerberos and Oracle

I'm configuring Kerberos on Oracle I have 2 machines, one is a server with Oracle DB, the other is a client with oracle client(basic+sqlplus), my sqlnet.ora is like this(on server) SQLNET.AUTHENTICATION_SERVICES= (BEQ, TCPS, KERBEROS5, NONE) SQLNET.FALLBACK_AUTHENTICATION=TRUE SQLNET.KERBEROS5_CONF_MIT = TRUE ADR_BASE = /var/oracle/app SQLNET.KERBEROS5_CC_NAME = /tmp/krb5cc_ SQLNET.KERBEROS5_KEYTAB = /etc/oracle.keytab SQLNET.KERBEROS5_CLOCKSKEW = 1200 SQLNET.KERBEROS5_CONF=/etc/krb5.conf SQLNET.AUTHENTICATION_KERBEROS5_SERVICE=myservice The keytab is ok, the configuration work and oracle user can access it sqlplus /@myserver.domain/myservice SQL*Plus: Release 21.0.0.0.0 - Production on Tue Apr 12 05:41:58 2022 Version 21.3.0.0.0 Copyright (c) 1982, 2021, Oracle. All rights reserved. Last Successful login time: Tue Apr 12 2022 05:26:22 +02:00 Connected to: Oracle Database 21c Enterprise Edition Release 21.0.0.0.0 - Production Version 21.3.0.0.0 SQL> select sys_context('userenv','authentication_method') from dual; SYS_CONTEXT('USERENV','AUTHENTICATION_METHOD') -------------------------------------------------------------------------------- KERBEROS The problem is on client. I have copied the sqlnet.ora(is identical to the server) in the right place I did kinit(I don't have okinit in the client) and... sqlplus /@myserver.domain/myservice SQL*Plus: Release 21.0.0.0.0 - Production on Tue Apr 12 05:43:44 2022 Version 21.5.0.0.0 Copyright (c) 1982, 2021, Oracle. All rights reserved. ERROR: ORA-01017: invalid username/password; logon denied Enter user-name: I have configured the user correctly(on the server the kerberos user can enter without problems), what I miss in the client?