Re: krb5 auth problem

Ian,

Jean-Loiuis provided me with a patch that fixed this problem. Thepatch was posted to the list.

I now face a new problem. I need to use my secondary kdc REALM toauthenticate, and not my default realm. The keytab on the server isfrom the second kdc realm and the principal is from this realm too.But, the client tries to authenticate with the default realm.

Any idea how I can tell the client to use the secondary kerberos realm?

Thanks,

--Chad


On  Jun 26, 2008, at 6:46 PM, Ian Turner wrote:

Chad,

This is a bug in Amanda. I have filed a bug report. As a workaround,you can

probably make it work by compiling --without-force-uid.

I don't think we have any kerberos users who test out daily builds, so

sometimes things break and nobody notices right away. Maybe if youhave a

spare machine, you can become the community kerberos tester. :-)

Cheers,

--Ian

On Thursday 26 June 2008 10:36:56 you wrote:

When i run spawn amandad via xinetd as root, i get this error.
1214490832.259079: amandad: critical (fatal): running as user "root"
instead of "amandabackup"

In the kerberos wiki it says amandad will relinquish root permissions
after reading the keytab. It doesnt seem to be doing that.
Also, What keytab on the client needs to be read as root?

--Chad

On Jun 25, 2008, at 5:29 PM, Jean-Louis Martineau wrote:

xinetd must be configured to run amandad as root.

Jean-Louis

Chad Kotil wrote:

I am trying to setup krb5 auth on amanda 2.6.0p1. I built the
server and client --with-krb5-security, added a new principal to my
KDC (amandabackup@KERBEROS REALM), and wrote a keytab file and
placed it on the server. It is locked down so only amandabackup
(the user that runs amanda) can read it. The clients have
a .k5amandahosts file containing the following:

amandabackup@KERBEROS REALM
backupmaster.f.q.d.n amandabackup@KERBEROS REALM

my amanda.conf file contains

krb5keytab      "/etc/amanda/krb5.keytab-amanda"
krb5principal   "amandabackup@KERBEROS REALM"


On both of my krb5 auth clients I am seeing this error:
1214425629.641678: amandad: critical (fatal): gss_server failed:
real uid is 10036, needs to be 0 to read krb5 host key

10036 is the UID for amandabackup, 0 is the UID for root.

Both clients work fine if I just use bsdtcp auth. I am using ssh
auth everywhere else but for these two particular hosts I cannot
use ssh keys.

Any ideas?

Thanks,

--Chad


Chad E. Kotil
Global Research NOC
ckotil AT grnoc.iu DOT edu
Phone: 812 855-5288

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