Centos 7X Enable FTP TLS Reference https://linuxconfig.org/setup-secure-proftpd-server-on-centos-7-with-tls Set the port range in /etc/proftpd.conf echo “PassivePorts 49152 65534″ >> /etc/proftpd.conf Open the Firewall ports firewall-cmd –add-port=49152-65534/tcp –permanent firewall-cmd –reload Validation firewall-cmd –list-ports Update the options in /etc/sysconfig/proftpd From PROFTPD_OPTIONS=”” To PROFTPD_OPTIONS=”-DTLS” Verify TLS has been setup in /etc/proftpd.conf TLSEngine on TLSRequired on TLSRSACertificateFile /etc/pki/tls/certs/proftpd.pem TLSRSACertificateKeyFile /etc/pki/tls/certs/proftpd.pem

Error: Mailbox access error: Panic: file mail-index-sync-keywords.c: assertion failed Cause Corrupted Dovecot index file. Resolution Connect to the server using SSH. Move the file /var/qmail/mailnames/example.com/john.doe/Maildir/dovecot.index: # cd /var/qmail/mailnames/example.com/john.doe/Maildir/ # mv dovecot.index{,.back}

Error xxxxxx crond: () FAILED to authorize user with PAM (Authentication token is no longer valid; new one required) RUN chage -l This can be due to the user’s password has expired.