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Knowledge Base

Can’t log in over SSH as root after deleting Imunify

 
croncron jobsplesk for linuxsecurityserver

Symptoms

  • Can't log in as root over SSH after removing Imunify from the server

    Access denied
    Permission denied

  • This is logged to /var/log/messages

    hostname crond[30531]: PAM unable to dlopen(/usr/lib64/security/pam_imunify.so): /usr/lib64/security/pam_imunify.so: cannot open shared object file: No such file or directory

  • CRON jobs fail to run, with these errors in /var/log/cron

    crond[28816]: (root) PAM ERROR (Module is unknown)
    crond[28816]: (root) FAILED to authorize user with PAM (Module is unknown)

  • Plesk notifications won't send after Daily Maintenance

Cause

Misconfiguration caused by leftovers from the Imunify extension in /etc/pam.d/system-auth and /etc/pam.d/password-auth.

Resolution

Remove the configuration lines from these files.

  1. Log in to Plesk

  2. Install the SSH Terminal extension and open it to access the system files

  3. Edit /etc/pam.d/system-auth and /etc/pam.d/password-auth by commenting these lines

    #%PAM-1.0

    #auth required pam_imunify.so check_only

    #auth required pam_imunify.so

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