How to fix PROFTPD login failed error

Hello,

If you got incorrect password  on proftpd after installing the package succesfully  and created a user correctly.

First check /var/log/messages

The error for me is as follows.

Apr 16 15:04:15 backup1 proftpd[14860]: ) - FTP session opened.

Apr 16 15:04:14 backup1 proftpd[14837]: - FTP session closed.

Then check the /var/log/secure

If you see error as

USER ftpuser (Login failed): Incorrect password.

Apr 16 14:56:45 backup1 proftpd: PAM unable to dlopen(/lib64/security/pam_stack.so): /lib64/security/pam_stack.so: cannot open shared object file: No such file or directory

PAM adding faulty module: /lib64/security/pam_stack.so

Then it is due to some incorrect settings on the default pam security settings of proftpd in

/etc/pam.d/proftpd

take a backup of it and then replace all the codes with below settings

#%PAM-1.0M-1.0

auth required pam_listfile.so item=user sense=deny file=/etc/ftpusers onerr=succeed

auth required pam_shells.so

auth include system-auth

account include system-auth

#session include system-auth

session required pam_loginuid.so

Then save the file and restart proftpd service

Then try to login with the created user. You should be able to login.

Reference-http://blog.redbranch.net/2012/04/17/proftpd-centos-6-pam-unable-to-dlopen-lib64securitypam_stack-so/

Regards

Syamkumar.M