On Tue, 1 Nov 2011, Trey Dockendorf wrote:
One difference I ran into with samba authentication is in cent 5 /etc/pam.d/system-auth-ac is the file to change but in cent 6 its /etc/pam.d/password-auth-ac. I found that changes I made only to system-auth-ac in 5 had to be made to both system-auth-ac and password-auth-ac in 6. This was to have authentication work for things like ssh and sudo in centos 6.
It is worth noting that those files should only be edited as a last resort. You should go through authconfig if possible.
#%PAM-1.0 # This file is auto-generated. # User changes will be destroyed the next time authconfig is run.
jh