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kinit: KDC can't fulfill requested option while renewing credentials

This document (000021417) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 15

Situation

Users are unable to renew the ticket-granting ticket

testuser@nfs:/home/testuser> kinit -R
kinit: KDC can't fulfill requested option while renewing credentials


Kerberos/KDC server reports TICKET NOT RENEWABLE

kdc:~ # tail -f -n 0 /var/log/krb5/krb5kdc.log
Apr 08 09:57:42 kdc krb5kdc[5352](info): TGS_REQ (8 etypes {aes256-cts-hmac-sha1-96(18), aes128-cts-hmac-sha1-96(17), aes256-cts-hmac-sha384-192(20), aes128-cts-hmac-sha256-128(19), DEPRECATED:des3-cbc-sha1(16), DEPRECATED:arcfour-hmac(23), camellia128-cts-cmac(25), camellia256-cts-cmac(26)}) 10.10.1.251: TICKET NOT RENEWABLE: authtime 0, etypes {rep=UNSUPPORTED:(0)} testuser@domain.lab for krbtgt/domain.lab@domain.lab, KDC can't fulfill requested option

 

Resolution

To enable and configure the renewal lifetime, on the client side, please add the following line to the [libdefaults] section of the /etc/krb5.conf file:
renew_lifetime = 10d

Please ensure that the parameter is configured with the appropriate value.
After requesting a new ticket with kinit, verify with klist -f that the R flag is present

testuser@nfs:/home/testuser> klist -f
Ticket cache: FILE:/tmp/krb5cc_1000
Default principal: testuser@domain.lab

Valid starting       Expires              Service principal
04/08/2024 10:01:36  04/08/2024 10:11:36  krbtgt/domain.lab@domain.lab
        renew until 04/15/2024 10:01:36, Flags: RI
04/08/2024 10:01:42  04/08/2024 10:11:36  nfs/nfsserver.domain.lab@domain.lab
        renew until 04/15/2024 10:01:36, Flags: RT

 

Cause

The renewable lifetime (renew_lifetime) for initial ticket requests is set to zero by default, effectively disabling renewal.

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:000021417
  • Creation Date: 08-Apr-2024
  • Modified Date:19-Apr-2024
    • SUSE Linux Enterprise Server

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