vsftpd + virtual users

apt-get install libpam-mysql

anonymous_enable=NO
local_enable=YES
guest_enable=YES
use_localtime=YES
local_root=/home/vsftpd/$USER
secure_chroot_dir=/var/run/vsftpd
chroot_local_user=YES
xferlog_enable=YES
pam_service_name=vsftpd
hide_ids=YES
user_sub_token=$USER
dirmessage_enable=YES
local_umask=022
connect_from_port_20=YES
write_enable=YES
virtual_use_local_privs=YES

auth required pam_mysql.so user=vsftpd passwd=p455w0rd host=localhost db=vsftpd table=accounts usercolumn=username passwdcolumn=pass crypt=2
account required pam_mysql.so user=vsftpd passwd=p455w0rd host=localhost db=vsftpd table=accounts usercolumn=username passwdcolumn=pass crypt=2

create database vsftpd;
use vsftpd;
CREATE TABLE `accounts` (
    -> `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
    -> `username` VARCHAR( 30 ) NOT NULL ,
    -> `pass` VARCHAR( 50 ) NOT NULL ,
    -> UNIQUE (
    -> `username`
    -> )
    -> ) ENGINE = MYISAM ;
GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP ON vsftpd.* TO 'vsftpd'@'localhost' IDENTIFIED BY 'X0Bih4vtIbzgLPd9AxLM';
FLUSH PRIVILEGES;
INSERT INTO accounts (username, pass) VALUES('testuser', PASSWORD('testpasswd'));

mkdir -p /home/vsftpd/testuser/www
chmod a-w /home/vsftpd/testuser
/etc/init.d/vsftpd restart