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# db_load -T -t hash -f virtual-users.txt /etc/vsftpd/virtual-users.db

2. Virtual users and authentication

We are going to use pam_userdb to authenticate the virtual users. This needs a username / password file in `db’ format – a common database format. We need `db_load’ program. For CentOS, Fedora, you may install the package `db4-utils’:

# yum install db4-utils

For Ubuntu,

# apt-get install db4.2-util

To create a `db’ format file, first create a plain text file `virtual-users.txt’ with the usernames and passwords on alternating lines:

mary 123456 jack 654321

Then execute the following command to create the actual database:

# db_load -T -t hash -f virtual-users.txt /etc/vsftpd/virtual-users.db

Now, create a PAM file /etc/pam.d/vsftpd-virtual which uses your database:

auth required pam_userdb.so db=/etc/vsftpd/virtual-users account required pam_userdb.so db=/etc/vsftpd/virtual-users

3. Configuration of VSFTPD

Create a configuration file /etc/vsftpd/vsftpd-virtual.conf,

# disables anonymous FTP anonymous_enable=NO # enables non-anonymous FTP local_enable=YES # activates virtual users guest_enable=YES # virtual users to use local privs, not anon privs virtual_use_local_privs=YES # enables uploads and new directories write_enable=YES # the PAM file used by authentication of virtual uses pam_service_name=vsftpd-virtual # in conjunction with 'local_root', # specifies a home directory for each virtual user user_sub_token=$USER local_root=/var/www/virtual/$USER # the virtual user is restricted to the virtual FTP area chroot_local_user=YES # hides the FTP server user IDs and just display “ftp” in directory listings hide_ids=YES # runs vsftpd in standalone mode listen=YES # listens on this port for incoming FTP connections listen_port=60021 # the minimum port to allocate for PASV style data connections pasv_min_port=62222 # the maximum port to allocate for PASV style data connections pasv_max_port=63333 # controls whether PORT style data connections use port 20 (ftp-data) connect_from_port_20=YES # the umask for file creation local_umask=022

4. Creation of home directories

Create each user’s home directory in /var/www/virtual, and change the owner of the directory to the user `ftp’:

# mkdir /var/www/virtual/mary # chown ftp:ftp /var/www/virtual/mary

5. Startup of VSFTPD and test Now we can start VSFTPD by the command:

# /usr/sbin/vsftpd /etc/vsftpd/vsftpd-virtual.conf

and test the FTP access of a virtual user:

# lftp -u mary -p 60021

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vsftpd.1379674235.txt.bz2 · В останнє змінено: 2015/12/17 14:02 (зовнішнє редагування)