i grep for KRB5CCNAME to the etc directory and the only match is in 
"/etc/default/slapd" and this is ok and has nothing todo with the login 
process. I think the sshd daemon do not honor the "default_ccache_name" 
and uses the default file format. I use pam_sss instead of pam_krb5. If 
i get my internet connection up again i will post my configuration files.

Thanks and best regards

On 19.09.2016 06:11, Benjamin Kaduk wrote:
> On Fri, 16 Sep 2016, t Seeger wrote:
>> Hello,
>> i have a little problem with the 'KRB5CCNAME' environment variable. I set
>> the default_ccache_name to KEYRING:persistent:%{uid} but if i login it is
>> set to "file:/tmp/krb5cc_${uid}_XXXXXXXXXX" cause ssh sets the KRB5CCNAME
>> to file:/tmp/krb5cc_${uid}_XXXXXXXXXX...
>> I found a workaround with adding "unset KRB5CCNAME" to /etc/bash.bashrc but
>> this is not very nice.
>> Did anyone had a similar problem and found a solution?
> The KRB5CCNAME environment variable takes precedence over the default
> ccache name.  It sounds like you should check the system dotfiles for a
> KRB5CCNAME assignment and check whether pam_krb5 is doing anything
> special.
> -Ben

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