Every attempt to connect from WAN or wireless LAN fails, this use to work since I upgraded my Linksys wrt3200 acm router. Looking at the Luci Log file always results in "User has invalid shell, rejected". The default directory is bin/false in /etc/passwd. I have directory I share using Samba4 (ntfs).
My /etc/vsftpd.conf is pasted in the thread below:
Please post it using the "Preformatted text </>
" button:

background=YES
listen=YES
anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
check_shell=NO
chroot_local_user=YES
allow_writeable_chroot=YES
local_root=/home
#dirmessage_enable=YES
#ftpd_banner=Welcome to blah FTP service.
session_support=NO
syslog_enable=YES
userlist_enable=YES
userlist_deny=NO
userlist_file=/etc/vsftpd/vsftpd.users
#xferlog_enable=YES
#xferlog_file=/var/log/vsftpd.log
#xferlog_std_format=YES
###
### TLS/SSL options
### example key generation: openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc
/vsftpd/vsftpd_privkey.pem -out /etc/vsftpd/vsftpd_cert.pem -subj /C="DE"/ST="Saxony"/L="Lei
pzig"/CN="OpenWrt"
#ssl_enable=YES
#allow_anon_ssl=NO
#force_local_data_ssl=NO
#force_local_logins_ssl=NO
#ssl_tlsv1=YES
#ssl_sslv2=NO
#ssl_sslv3=NO
#rsa_cert_file=/etc/vsftpd/vsftpd_cert.pem
#rsa_private_key_file=/etc/vsftpd/vsftpd_privkey.pem
pasv_enable=YES
pasv_min_port=30100
pasv_max_port=30000