[CentOS] CentOS for vsftpd with MySQL Virtual user

從ubuntu 12.04的安裝手法拿到CentOS來真的有些很大的不同

絕大部分的語法、概念都是差不多的，只是指令上有些差別，跟ubuntu 有不一樣的地方特別拿出來另外說明

要讓vsftpd與mysql溝通一定要有一個介值，mysql的插件是一定要裝的

在ubuntu 12.04需要 libpam-ldap
CentOS 6.3 需要 pam_mysql

vsftpd主配置檔
/etc/pam.d/vsftpd

crypt=0: 明文密碼
crypt=1: 使用crpyt()函數(對應SQL資料表的encrypt()，encrypt()隨機產生salt)
crypt=2: 使用MySQL中的password()函數加密
crypt=3：表示使用md5函數加密

使用系統與套件
system：CentOS 6.3
software：MySQL 5.1、vsftpd 2.2

一、安裝軟體
1)使用這兩個software就一定要安裝他們
  # yum install vsftpd mysql-server
2)啟用mysqld後，會提式第一次使用mysql一定要執行 mysqladmin 設定密碼
  # /etc/init.d/mysqld start
  # mysqladmin -u root password 'you root sql password'

二、設定vsftpd
1)建立與mysql橋接的guest user，這個帳號只用於跟mysql溝通
  # useradd -G users -s /sbin/nologin -d /home/vsftpd  vsftpd

2)備份vsftpd.conf避免設定失敗
  # cp -v /etc/vsftpd/vsftpd.conf   /etc/vsftpd/vsftpd.conf-orig
3)清空設定檔
  # cat /dev/null > /etc/vsftpd/vsftpd.conf
4)編輯設定檔
  #vi /etc/vsftpd/vsftpd.conf

5) 內容
# No ANONYMOUS users allowed
anonymous_enable=NO
# Allow 'local' users with WRITE permissions (0755)
local_enable=YES
write_enable=YES
local_umask=022
dirmessage_enable=YES
xferlog_enable=YES

# if you want to LOG vsftpd activity then uncomment this log_ftp_protocol
# log_ftp_protocol=YES

connect_from_port_20=YES

# uncomment xferlog_file and xferlog_std_format if you DIDN'T use the line above 
# with log_ftp_protocol - it must be excluding each other
# The name of log file when xferlog_enable=YES and xferlog_std_format=YES
# WARNING - changing this filename affects /etc/logrotate.d/vsftpd.log
#xferlog_file=/var/log/xferlog
#
# xferlog_std_format Switches between logging into vsftpd_log_file and xferlog_file files.
# NO writes to vsftpd_log_file, YES to xferlog_file
# xferlog_std_format=YES

#
# You may change the default value for timing out an idle session (in seconds).
#idle_session_timeout=600
#
# You may change the default value for timing out a data connection (in seconds).
#data_connection_timeout=120
#
# define a unique user on your system which the
# ftp server can use as a totally isolated and unprivileged user.
nopriv_user=vsftpd

chroot_local_user=YES

listen=YES

# here we use the authentication module for vsftpd to check users name and passw
pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES

# If userlist_deny=YES (default), never allow users in this file
# /etc/vsftpd/user_list , and do not even prompt for a password.
# Note that the default vsftpd pam config also checks /etc/vsftpd/ftpusers
# for users that are denied.
userlist_deny=yes

# here the vsftpd will allow the 'vsftpd' user to login into '/home/vsftpd/$USER directory
guest_enable=YES
guest_username=vsftpd
local_root=/home/vsftpd/$USER
user_sub_token=$USER
virtual_use_local_privs=YES
user_config_dir=/etc/vsftpd/vsftpd_user_conf

force_local_data_ssl=NO
force_local_logins_ssl=NO

# PASV - passive ports for FTP (range 44000 - 44100 ; 100 PASV ports, OPEN FIREWALL FOR ALLOWING CONNECTIONS
pasv_enable=YES
pasv_min_port=44000
pasv_max_port=44100

6)建立vsftpd的virtual user的個人設定檔目錄
  # mkdir /etc/vsftpd/vsftpd_user_conf

7)編輯個人設定檔
  # vi /etc/vsftpd/vsftpd_user_conf/user1

8)編輯內容
dirlist_enable=YES
download_enable=YES
# full path to the directory where 'user1' will have access, change to your needs
local_root=/home/vsftpd/user1
write_enable=YES

11)備份於pam.d下的vsftpf設定檔
   # cp /etc/pam.d/vsftpd /etc/pam.d/vsftpd-orig

12)清空設定檔
   # echo > /etc/pam.d/vsftpd
13)編輯設定檔，寫入內容
   # vi /etc/pam.d/vsftpd
   內容
#%PAM-1.0
session     optional     pam_keyinit.so     force revoke
auth required pam_mysql.so user=vsftpd passwd=vsftpdpasswd host=localhost db=vsftpd table=accounts usercolumn=username passwdcolumn=pass crypt=3
account required pam_mysql.so user=vsftpd passwd=vsftpdpasswd host=localhost db=vsftpd table=accounts usercolumn=username passwdcolumn=pass crypt=3

三、建立管理虛擬使用者db與table
1)設定資料庫名稱，這裡設定是vsftpd
  mysql> CREATE DATABASE vsftpd;

2)設定"使用者"與"密碼"能夠管理"vsftpd"這個資料庫，在本機端
  mysql> GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP ON vsftpd.* TO 'username'@'localhost' IDENTIFIED BY 'password';

3)更新資料庫資料
  mysql> FLUSH PRIVILEGES;
4)建立資料表各欄位
  mysql> USE vsftpd;

mysql> 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 ;

5)建立virtual user 與 password
  mysql> INSERT INTO accounts (username, pass) VALUES('user1', md5('123456'));
  mysql> INSERT INTO accounts (username, pass) VALUES('testu', PASSWORD('secret@123'));
6)查看目前的user
  mysql> select * from accounts;

7)建立virtual user 需要的目錄
  # mkdir /home/vsftpd/user1
  # chown vsftpd:users /home/vsftpd/user1

四、安裝插件
1)安裝與mysql連接的檔案
http://pkgs.org/centos-6-rhel-6/epel-x86_64/pam_mysql-0.7-0.12.rc1.el6.x86_64.rpm.html
  # wget http://dl.fedoraproject.org/pub/epel/6/x86_64/pam_mysql-0.7-0.12.rc1.el6.x86_64.rpm

用rpm安裝，U參數是沒安裝過的software直接安裝，有裝過舊版的自動更新為新版
  # rpm -Uvh pam_mysql-0.7-0.12.rc1.el6.x86_64.rpm

一般安裝於/lib/security/ 這目錄下，如果是x64就會在 /lib64/serurity/ 下

2)安裝mysql需要插件
  #  yum install mysql-devel

重啟服務
service mysqld vsftpd restart

http://rewriterdark.blogspot.tw/2013/01/centos-for-vsftpd-with-mysql-virtual.html