anonymous_enable=NO
local_enable=YES
write_enable_YES
chroot_local_user=YES

webserver:x:1000:1000:,,,:/home/webserver/:/bin/ftp
profesorado:x:1002:1002:,,,:/home/webserver/:/bin/ftp

220 (vsFTPd 3.0.3)
Name (192.168.?.?:administrador): webserver
331 Please specify the password.
Password:
500 OOPS: vsftpd: refusing to run with writable root inside chroot()
Login failed.
421 Service not available, remote server has closed connection

#local_enable=YES
#write_enable=YES
#chroot_local_user=YES