Wes,

In addition, make sure all your DNS entries are correct. Forward and reverse.

Cannot find host in Kerberos database can arise from: 1. missing entry in your /etc/krb5.conf file (James spoke to this clearly) 2. missing machine account in AD, (unlikely, because your AD join succeeded) 3. missing DNS entries or 4. not able to determine your AD domain (kerberos realm) from your DNS domain. (unlikely, because your AD join succeeded).

Spike

On Thu, Jul 30, 2020 at 11:18 AM Wesley Taylor wesley.taylor@numerica.us wrote:

Sorry I asked this question in the wrong place, but thank you for the awesome answer James!

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On Wed, Jul 29, 2020 at 8:24 PM Wesley Taylor wesley.taylor@numerica.us wrote:

...

I have a program I am trying to set up which tries to authenticate with the principal host\machine-FQDN@REALM using Kerberos.

However, when I run kinit -k, the machine isn't found in the Kerberos database.

"kinit -k" (with no arguments) defaults to attempting to obtain a TGT for (e.g.) host/mymachine.example.org@EXAMPLE.ORG, which only works if you set userPrincipalName to host/mymachine.example.org@EXAMPLE.ORG when you joined the host to Active Directory.

Running "kinit -k MYMACHINE$" (that is, using the value of the sAMAccountName attribute as the argument to "kinit -k") should always work.

...

From what I have read, SSSD is responsible for being the glue between MIT Kerberos (what Linux uses) and Microsoft Kerberos (which Active Directory uses).

This has nothing to do with sssd; it's all about setting userPrincipalName correctly when you join the host to AD if you want "kinit -k" (with no arguments) to work. _______________________________________________ sssd-users mailing list -- sssd-users@lists.fedorahosted.org To unsubscribe send an email to sssd-users-leave@lists.fedorahosted.org Fedora Code of Conduct:

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