I see the following proftpd-related error messages in /var/log/secure on CentOS and I was wondering if they are expected or if some changes might be required to get rid of these:
proftpd: Deprecated pam_stack module called from service "proftpd"
I guess this is because /etc/pam.d/proftpd (part of the psa-proftpd RPM package in Atomic) contains references to pam_stack.so. I only see this on CentOS 5, the psa-proftpd package for CentOS 6 contains a different /etc/pam.d/proftpd which does not contain references to pam_stack.so.
proftpd: pam_env(proftpd:setcred): Unable to open config file: /etc/security/pam_env.conf: No such file or directory
/etc/security/pam_env.conf (part of the pam RPM package from CentOS) actually does exist on the filesystem.
proftpd: pam_unix(proftpd:session): session opened for user xxxxxxxx by (uid=0)
proftpd: xxx.xxx.xxx.xxx (127.0.0.1[127.0.0.1]) - USER xxxxxxxx: Login successful.
proftpd: pam_succeed_if(proftpd:session): error retrieving information about user 0
Logging in works fine, but after each successful login an error about retrieving information about user 0 is logged.