之前有介绍过centos下搭建vsftpd服务器，可以参考如下文章
CentOS7下搭建vsftpd服务器(本地用户模式)
下面开启SSL/TLS用于FTP安全加密传输
1、生成自签证书
cd /etc/pki/tls/certs/
openssl req -x509 -nodes -newkey rsa:2048 -keyout vsftpd.pem -out vsftpd.pem -days 365
[root@VM_Server ~]# cd /etc/pki/tls/certs/[root@VM_Server certs]# lltotal 12
lrwxrwxrwx. 1 root root 49 Jan 4 2020 ca-bundle.crt -> /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem
lrwxrwxrwx. 1 root root 55 Jan 4 2020 ca-bundle.trust.crt -> /etc/pki/ca-trust/extracted/openssl/ca-bundle.trust.crt
-rwxr-xr-x. 1 root root 610 Oct 31 2018 make-dummy-cert
-rw-r--r--. 1 root root 2516 Oct 31 2018 Makefile
-rwxr-xr-x. 1 root root 829 Oct 31 2018 renew-dummy-cert
[root@VM_Server certs]# openssl req -x509 -nodes -newkey rsa:2048 -keyout vsftpd.pem -out vsftpd.pem -days 365
Generating a 2048 bit RSA private key
................+++
...........................+++
writing new private key to 'vsftpd.pem'
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [XX]:CNState or Province Name (full name) []:ZheJiangLocality Name (eg, city) [Default City]:HangZhou
Organization Name (eg, company) [Default Company Ltd]:WalkingCloudOrganizational Unit Name (eg, section) []:ITCommon Name (eg, your name or your server's hostname) []:ftp.walkingcloud.cnEmail Address []:yuanfan@walkingcloud.cn[root@VM_Server certs]# lltotal 16
lrwxrwxrwx. 1 root root 49 Jan 4 2020 ca-bundle.crt -> /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem
lrwxrwxrwx. 1 root root 55 Jan 4 2020 ca-bundle.trust.crt -> /etc/pki/ca-trust/extracted/openssl/ca-bundle.trust.crt
-rwxr-xr-x. 1 root root 610 Oct 31 2018 make-dummy-cert
-rw-r--r--. 1 root root 2516 Oct 31 2018 Makefile
-rwxr-xr-x. 1 root root 829 Oct 31 2018 renew-dummy-cert
-rw-r--r-- 1 root root 3176 Aug 8 09:01 vsftpd.pem
然后拷贝证书
cd /etc/vsftpd/
cp /etc/pki/tls/certs/vsftpd.pem ./
chmod 600 vsftpd.pem
2、配置vsftpd.conf
vi /etc/vsftpd/vsftpd.conf 添加如下参数
# enable TLS
rsa_cert_file=/etc/vsftpd/vsftpd.pem
ssl_enable=YES
ssl_ciphers=HIGH
ssl_tlsv1=YES
ssl_sslv2=NO
ssl_sslv3=NO
force_local_data_ssl=YES
force_local_logins_ssl=YES
3、重启vsftpd服务，安装lftp客户端工具测试
service vsftpd restart
yum install -y lftp
lftp -u yuanfan 192.168.31.80
4、windows下使用Filezilla FTP客户端连接
