配置 ProFTPD
然后，通过修改相应配置文件配置ProFTPD。
[root@sample ~]# vi /etc/proftpd.conf ← 修改ProFTPD的配置文件
ServerType standalone ← 找到这一行，在行首添加“#”
↓
#ServerType standalone ← 变为此状态，不使用常驻模式
#ServerType inetd ← 找到这一行，去掉行首的“#”
↓
ServerType inetd ← 变为此状态，通过超级服务器来启动ProFTPD
DefaultRoot ~ !adm ← 找到这一行，将“ !adm”改为“/public_html !wheel”
↓
DefaultRoot ~/public_html !wheel ← 变为此状态，使除wheel组用户的根目录为public_html
找到TLS设置的语句群，如下：
# TLS
# Explained at http://www.castaglia.org/proftpd/modules/mod_tls.html
----------------------------------------------------------------
#TLSEngine on
#TLSRequired on
#TLSRSACertificateFile /usr/share/ssl/certs/proftpd.pem
#TLSRSACertificateKeyFile /usr/share/ssl/certs/proftpd.pem
#TLSCipherSuite ALL:!ADH:!DES
#TLSOptions NoCertRequest
#TLSVerifyClient off
##TLSRenegotiate ctrl 3600 data 512000 required off timeout 300
#TLSLog /var/log/proftpd/tls.log
----------------------------------------------------------------
↓将以上水平线间部分的语句，每行行首的“#”都去掉，变为下面水平线间的状态：
----------------------------------------------------------------
TLSEngine on
TLSRequired on ← 只允许TLS方式的连接（如果将on改为off，普通方式也被允许）
TLSRSACertificateFile /usr/share/ssl/certs/proftpd.pem
TLSRSACertificateKeyFile /usr/share/ssl/certs/proftpd.pem
TLSCipherSuite ALL:!ADH:!DES
TLSOptions NoCertRequest
TLSVerifyClient off
#TLSRenegotiate ctrl 3600 data 512000 required off timeout 300
TLSLog /var/log/proftpd/tls.log