Hey list,

I have joined a CentOS 7 host to an AD domain using a fairly new version of 
adcli (one of the versions that has this [0] bug fixed). In its keytab, this 
host has a service principal of the form 'host/fqdn@REALM' (i.e. lowercase). 
User lookups with SSSD don't work, and the SSSD log says "Client 
'host/fdqn@REALM' not found in Kerberos database. Unable to create 
GSSAPI-encrypted LDAP connection."

However, if I use the 'old' adcli to join the node and create the keytab, it 
creates a service principal of the form 'HOST/fqdn@REALM'. With this keytab, I 
can do username lookups just fine.

Should this be considered a bug? Is there a way to make service principal 
lookups w/SSSD case insensitive? I would like to keep the lower-case principal 
names in my keytabs, because OpenSSH GSSAPI auth only works with those.

Thanks for any pointers!

Best,
Patrice

[0] https://bugs.freedesktop.org/show_bug.cgi?id=84749

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