This is a discussion on Kerberos authentication; krb5.keytab significance. - Kerberos ; Hello, I am attempting to setup Linux(Redhat) to use Kerberos authentication via Active Directory. I have configured my /etc/krb5.conf with the appropriate REALM and KDC entries. I am able to kinit and receive a krb5 ticket. Also I have joined ...
I am attempting to setup Linux(Redhat) to use Kerberos authentication
via Active Directory.
I have configured my /etc/krb5.conf with the appropriate REALM and KDC
I am able to kinit and receive a krb5 ticket.
Also I have joined the box to the Active directory domain using Samba
and the net adds join command.
I can authenticate using Winbind but would rather use kerberos. However
I get errors in the messages log such as..
sshd: pam_krb5: account checks fail for 'Domain\user': user
is unknown or account expired.
sshd: pam_krb5: authentication fails for 'Domain\user'
(Domainusername@REALM): User not known to the underlying authentication
module (Client not found in Kerberos database).
When logging in I am prepending the domain name for example..
DOMAIN\username. That results in the above message.
I also tried username@REALM and that leaves no mention of krb5 in the
message log rather it shows.
sshd: input_userauth_request: invalid user user@REALM
Jul 29 08:51:55 phx1amwk169925 sshd: pam_unix(sshd:auth): check
pass; user unknown
Jul 29 08:51:55 phx1amwk169925 sshd: pam_unix(sshd:auth):
authentication failure; logname= uid=0 euid=0 tty=ssh ruser=
Jul 29 08:51:55 phx1amwk169925 sshd: pam_succeed_if(sshd:auth):
error retrieving information about user user@REALM
Jul 29 08:51:58 phx1amwk169925 sshd: Failed password for invalid
user user@REALM from 172.16.155.156 port 39913 ssh2.
While I was doing some reading last night I found that joining Active
Directory using net ads join does not create a /etc/krb5.keytab file. I
have a feeling this may be part of the issue? I do not have a
krb5.keytabfile on the box.
Also the account for the box exists in Active Directory users and
computers and I can retrieve the info on it by using the css_adkadmin
get_account command. Can I somehow pull a keytab file from Active
Directory from this existing computer account? I am not quite sure of
the contents of the keytab file. Is it possible to manually create and
While I wait for a response I will do some more reading.
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