On 09/18/2017 05:11 PM, 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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Hi,
the location of the credential cache can be specified either using the
environment variable $KRB5CCNAME or globally in /etc/krb5.conf (with the
setting default_ccache_name, or default value FILE:/tmp/krb5cc_%{uid} if
not specified).
Please note that more recent version of freeIPA configure
default_ccache_name = KEYRING:persistent:%{uid}
HTH,
Flo