Vsftpd with SSL-TLS on CentOS 7

after installing vsftpd you have to perform
setsebool -P ftp_home_dir=1

sudo mkdir /etc/ssl/private

To create the certificate and the key in a single file, we can use this command:

openssl req -x509 -nodes -days 365 -newkey rsa:1024 -keyout /etc/ssl/private/vsftpd.pem -out /etc/ssl/private/vsftpd.pem

go to /etc/vsftpd/vsftpd.conf
comment the line
anonymous_enable=YES
uncomment the line
chroot_local_user=YES
add the line

dual_log_enable=YES
At the end add those lines
rsa_cert_file=/etc/ssl/private/vsftpd.pem
rsa_private_key_file=/etc/ssl/private/vsftpd.pem
ssl_enable=YES
allow_anon_ssl=NO
force_local_data_ssl=YES
force_local_logins_ssl=YES
ssl_tlsv1=YES
ssl_sslv2=NO
ssl_sslv3=NO
require_ssl_reuse=NO
ssl_ciphers=HIGH
save the file
firewall-cmd --permanent --add-port=21/tcp
firewall-cmd --permanent --add-port=21/udp
firewall-cmd --permanent --add-port=20/tcp
firewall-cmd --permanent --add-port=20/udp
firewall-cmd --permanent --add-service=ftp
firewall-cmd --reload
service vsftpd restart
chkconfig vsftpd on