On Tue, 2017-09-19 at 14:37 -0400, Simo Sorce via FreeIPA-users wrote:
We normally store credentials in the kernel keyring, have you
changed
the default ccache type in your installation ?
Ignore the above, I overlooked that you are on RHEL6, we introduced the
keyring in RHEL7.
Simo.
If you have elected to use /tmp to store ccaches and it is full it
is
expected for auth to fail.
Simo.
On Mon, 2017-09-18 at 17:11 +0200, Marius Bjørnstad via FreeIPA-users
wrote:
> Hi,
>
> When /tmp is full, it is impossible to authenticate with Kerberos.
> Login with password over SSH and sudo don't work. Login with ssh
> key
> works fine. Here is the output in the system log when I try to log
> on
> via SSH with password auth (this is on RHEL 6):
>
> Sep 18 16:56:59 vali sshd[35157]: Set /proc/self/oom_score_adj to 0
> Sep 18 16:56:59 vali sshd[35157]: Connection from 192.168.1.48 port
> 49917
> Sep 18 16:57:02 vali [sssd[krb5_child[35165]]]: Credentials cache
> I/O
> operation failed XXX
> Sep 18 16:57:02 vali [sssd[krb5_child[35165]]]: Credentials cache
> I/O
> operation failed XXX
> Sep 18 16:57:04 vali sshd[35157]: Failed password for paalmbj from
> 192.168.1.48 port 49917 ssh2
> Sep 18 16:57:07 vali sshd[35158]: Connection closed by 192.168.1.48
>
> From SSH I get:
> Permission denied, please try again.
>
> The problem seems to be that Kerberos can't store its credentials
> cache. Is this normal, and is there a way around it? Sure, ideally
> I
> should limit the space usable by each user, but that doesn't help
> when a given user needs to log in and fix their tmp usage.
>
> Thanks,
> Marius
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--
Simo Sorce
Sr. Principal Software Engineer
Red Hat, Inc
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Simo Sorce
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Red Hat, Inc