问腾讯云Ubuntu14.04 配置FTP服务器，内网可以访问和查看信息，外网一直进不去？

云服务器上内网访问，可以查看FTP文件信息

外网访问window7旗舰版

后面因为，觉得是21号端口问题，也打开了21号端口和暴露安全组去尝试能否放外部访问。

但均失败了。安全组用了ALL

# Example config file /etc/vsftpd.conf

#

# Run standalone with IPv6?

# Like the listen parameter, except vsftpd will listen on an IPv6 socket

# instead of an IPv4 one. This parameter and the listen parameter are mutually

# exclusive.

#listen_ipv6=YES

#

# Beware that on some FTP servers, ASCII support allows a denial of service

# attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd

# predicted this attack and has always been safe, reporting the size of the

#

# You may fully customise the login banner string:

# (default follows)

#banned_email_file=/etc/vsftpd.banned_emails

#

# You may restrict local users to their home directories. See the FAQ fo

# the possible risks in this before using chroot_local_user o

# chroot_list_enable below.

# You may specify an explicit list of local users to chroot() to their home

# directory. If chroot_local_user is YES, then this list becomes a list of

# the user does not have write access to the top level directory within the

# access.

secure_chroot_dir=/var/run/vsftpd/empty

#

# This string is the name of the PAM service vsftpd will use.

pam_service_name=vsftpd

#

# This option specifies the location of the RSA certificate to use for SSL

# encrypted connections.

rsa_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem

# This option specifies the location of the RSA key to use for SSL

# encrypted connections.

rsa_private_key_file=/etc/ssl/private/ssl-cert-snakeoil.key

# ubuntu root

local_root=/home/ubuntu/ftp

# ÏÞÖÆÓû§¶ÔÖ÷Ŀ¼ÒÔÍâĿ¼·ÃÎÊ

chroot_local_user=YES

# Ö¸¶¨Ò»¸ö userlist ´æ·ÅÔÊÐí·ÃÎÊ ftp µÄÓû§Áбí

userlist_deny=NO

userlist_enable=YES

# ¼Ç¼ÔÊÐí·ÃÎÊ ftp Óû§Áбí

userlist_file=/etc/vsftpd.user_list

# ²»ÅäÖÿÉÄܵ¼ÖÂĪÃûµÄ530ÎÊÌâ

seccomp_sandbox=NO

# ÔÊÐíÎļþÉÏ´«

write_enable=YES

# ʹÓÃutf8±àÂë

utf8_filesystem=YES

pasv_address=140.143.139.*

pasv_enable=YES

pasv_min_port=1024

pasv_max_port=2048

HOW to fix it?

如果有您的回答，真诚的感激您！谢谢