FTP Learning Chapter

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Install FTP

1. 1.yuminstall vsftpd–y

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lftp ID can login and display, indicating installation success

Setenforce 0 ( error 553, local file system error 0:selinux Mode 1: Forced mode )

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1. 2. Configure the firewall

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1. 3.vsftpd file Information

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/var/ftp Default Publishing Directory

/etc/vsftpd Configuration Directory

4.vsftpd configuration parameters for the server

Anonymous User Login Restrictions

Anonymous_enable=yes|no

Anonymous uploads

Vim/etc/vsftpd/vsftpd.conf

Anon_enable=yes

Chgrp ftp/var/ftp/pub

chmod 755/var/ftp/pub ( error 550 service itself error, view service profile )

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Anonymous user upload file default permission modification ( Note: This sentence and anon_world_readable_only=on can only write one sentence )

anon_umask=022 (the system kernel will cut down the execution permissions )

Anonymous users to download their own uploaded files

anon_world_readable_only=on| YES

Anonymous user Delete

Anon_other_write_enable=yes|no

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Anonymous User home Directory modification

Anon_root=/direcotry

User identity modifications used by anonymous users

Chown_uploads=yes

Chown_username=student

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Maximum transmission limit for anonymous users
anon_max-rate=102400

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Number of login limits for anonymous users ( maximum number of links )
Max_clients=1

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Local User settings
Local_enable=yes|no Local User Login restrictions
Write_enable=yes|no Local User Write permission restrictions
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Local User Home Directory modification
Local_root=/directory

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Local User upload file permissions
Local_umask=xxx

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Restrict local user Browse/directory
All users are locked into their home directory
Chroot_local_user=yes
chmod u-w/home/* (otherwise there will be a warning conflict error)

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user blacklist (all local users can freely access local files, but the blacklist file is written in the user can not )
Chroot_local_user=no
Chroot_list_enable=yes
Chroot list File=/etc/vsftpd/chroot List
User whitelist (all local users cannot access files other than their home directories, but users written in the whitelist file can)
Chroot_local_user=yes
Chroot_list_enable=yes
Chroot list File=/etc/vsftpd/chroot List

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Restrict Local User Login
Vim/etc/vsftpd/ftpusers
Vim/etc/vsftpd/user-list

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User White list settings
Userlist_deny=no (blacklist forbidden, double negative, so white list)
/etc/vsftpd/user_list
Users who appear in the whitelist can log in to FTP

FTP Virtual user's settings
Vim/etc/vsftpd/loginusers
Ftpuser1
123
Ftpuser2
123
Ftpuser3
123
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Db_load-t-T hash-f/etc/vsftpd/loginusers loginusers.db

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Vim/etc/vsftpd/vsftpd.conf
Pam_service_name=ddd
Guest_enable=yes
Virtual Account Identity Designation
Guest_username=ftp
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Virtual Account Home directory independent settings
Vim/etc/vsftpd/vsftpd.conf
local_root=/ftpdir/$USER
user_sub_token= $USER

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FTP Learning Chapter