When you see these in the report of rkhunter in a plesk server: Warning: Found enabled xinetd service: /etc/xinetd.d/ftp_psa Warning: Found enabled xinetd service: /etc/xinetd.d/poppassd_psa Warning: Found enabled xinetd service: /etc/xinetd.d/smtp_psa Warning: Found enabled xinetd service: /etc/xinetd.d/smtps_psa Warning: Found enabled xinetd service: /etc/xinetd.d/submission_psa