On Fri, Dec 01, 2017 at 11:54:35AM +0000, James Harrison via FreeIPA-users wrote:

Hello,One one of our FreeIPA servers we are seeing the following messages from journal -f

Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7056](info): AS_REQ (8 etypes {18 17 16 23 25 26 20 19}) 10.3.5.88: PREAUTH_FAILED: host/ipa-01.int.domain.com@INT.domain.COM for krbtgt/INT.domain.COM@INT.domain.COM, Preauthentication failed Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7056](info): closing down fd 11 Dec 01 11:50:14 ipa-01.int.domain.com [sssd[ldap_child[9717]]][9717]: Failed to initialize credentials using keytab [MEMORY:/etc/krb5.keytab]: Preauthentication failed. Unable to create GSSAPI-encrypted LDAP connection. Dec 01 11:50:14 ipa-01.int.domain.com [sssd[ldap_child[9717]]][9717]: Preauthentication failed Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7056](info): AS_REQ (8 etypes {18 17 16 23 25 26 20 19}) 10.3.5.88: NEEDED_PREAUTH: host/ipa-01.int.domain.com@INT.domain.COM for krbtgt/INT.domain.COM@INT.domain.COM, Additional pre-authentication required Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7056](info): closing down fd 11 Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7055](info): preauth (encrypted_timestamp) verify failure: Preauthentication failed Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7055](info): AS_REQ (8 etypes {18 17 16 23 25 26 20 19}) 10.3.5.88: PREAUTH_FAILED: host/ipa-01.int.domain.com@INT.domain.COM for krbtgt/INT.domain.COM@INT.domain.COM, Preauthentication failed Dec 01 11:50:14 ipa-01.int.domain.com krb5kdc[7055](info): closing down fd 11 Dec 01 11:50:14 ipa-01.int.domain.com [sssd[ldap_child[9721]]][9721]: Failed to initialize credentials using keytab [MEMORY:/etc/krb5.keytab]: Preauthentication failed. Unable to create GSSAPI-encrypted LDAP connection. Dec 01 11:50:14 ipa-01.int.domain.com [sssd[ldap_child[9721]]][9721]: Preauthentication failed

Most probably /etc/krb5.keytab got out of sync, i.e. someone called ipa-getkeytab (or similar) without writing the result to /etc/krb5.keytab. You can check this by calling

klist -k

and

kinit admin (or some other IPA user) kvno host/ipa-01.int.domain.com@INT.domain.COM

if the key version number (kvno) from the kvno output cannot be found in the klist output you have to write a fresh key to /etc/krb5.keytab with ipa-getkeytab.

HTH

bye, Sumit

[root@pul-lv-ipa-01 ~]# ipa --version VERSION: 4.5.0, API_VERSION: 2.228

I[root@pul-lv-ipa-01 log]# cat /etc/centos-release CentOS Linux release 7.4.1708 (Core)

Many thanks for any help, Regards,James Harrison

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