vsftpd使用問題



贊助商連結


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kevin7326
2010-11-28, 11:23 AM
使用fedora 14,並且使用yum來安裝vsftpd
但是安裝完成後
不管是root或者一般user登錄都會出現下面的錯誤訊息:
500 oops cannot change directory

如果匿名使用者可成功登錄
但是卻出現
550 permission denied

google嘗試過setsebool ftpd_disable_trans on
不能執行這指令

我的vsftpd.conf設定檔如下
# Example config file /etc/vsftpd/vsftpd.conf
#
# The default compiled in settings are fairly paranoid. This sample file
# loosens things up a bit, to make the ftp daemon more usable.
# Please see vsftpd.conf.5 for all compiled in defaults.
#
# READ THIS: This example file is NOT an exhaustive list of vsftpd options.
# Please read the vsftpd.conf.5 manual page to get a full idea of vsftpd's
# capabilities.
#
# Allow anonymous FTP? (Beware - allowed by default if you comment this out).
anonymous_enable=YES
#
# Uncomment this to allow local users to log in.
local_enable=YES
#
# Uncomment this to enable any form of FTP write command.
write_enable=YES
#
# Default umask for local users is 077. You may wish to change this to 022,
# if your users expect that (022 is used by most other ftpd's)
local_umask=022
#
# Uncomment this to allow the anonymous FTP user to upload files. This only
# has an effect if the above global write enable is activated. Also, you will
# obviously need to create a directory writable by the FTP user.
#anon_upload_enable=YES
#
# Uncomment this if you want the anonymous FTP user to be able to create
# new directories.
#anon_mkdir_write_enable=YES
#
# Activate directory messages - messages given to remote users when they
# go into a certain directory.
dirmessage_enable=YES
#
# Activate logging of uploads/downloads.
xferlog_enable=YES
#
# Make sure PORT transfer connections originate from port 20 (ftp-data).
connect_from_port_20=YES
#
# If you want, you can arrange for uploaded anonymous files to be owned by
# a different user. Note! Using "root" for uploaded files is not
# recommended!
#chown_uploads=YES
#chown_username=whoever
#
# You may override where the log file goes if you like. The default is shown
# below.
#xferlog_file=/var/log/vsftpd.log
#
# If you want, you can have your log file in standard ftpd xferlog format.
# Note that the default log file location is /var/log/xferlog in this case.
xferlog_std_format=YES
#
# You may change the default value for timing out an idle session.
#idle_session_timeout=600
#
# You may change the default value for timing out a data connection.
#data_connection_timeout=120
#
# It is recommended that you define on your system a unique user which the
# ftp server can use as a totally isolated and unprivileged user.
#nopriv_user=ftpsecure
#
# Enable this and the server will recognise asynchronous ABOR requests. Not
# recommended for security (the code is non-trivial). Not enabling it,
# however, may confuse older FTP clients.
#async_abor_enable=YES
#
# By default the server will pretend to allow ASCII mode but in fact ignore
# the request. Turn on the below options to have the server actually do ASCII
# mangling on files when in ASCII mode.
# Beware that on some FTP servers, ASCII support allows a denial of service
# attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd
# predicted this attack and has always been safe, reporting the size of the
# raw file.
# ASCII mangling is a horrible feature of the protocol.
#ascii_upload_enable=YES
#ascii_download_enable=YES
#
# You may fully customise the login banner string:
#ftpd_banner=Welcome to blah FTP service.
#
# You may specify a file of disallowed anonymous e-mail addresses. Apparently
# useful for combatting certain DoS attacks.
#deny_email_enable=YES
# (default follows)
#banned_email_file=/etc/vsftpd/banned_emails
#
# You may specify an explicit list of local users to chroot() to their home
# directory. If chroot_local_user is YES, then this list becomes a list of
# users to NOT chroot().
#chroot_local_user=YES
#chroot_list_enable=YES
# (default follows)
#chroot_list_file=/etc/vsftpd/chroot_list
#
# You may activate the "-R" option to the builtin ls. This is disabled by
# default to avoid remote users being able to cause excessive I/O on large
# sites. However, some broken FTP clients such as "ncftp" and "mirror" assume
# the presence of the "-R" option, so there is a strong case for enabling it.
#ls_recurse_enable=YES
#
# When "listen" directive is enabled, vsftpd runs in standalone mode and
# listens on IPv4 sockets. This directive cannot be used in conjunction
# with the listen_ipv6 directive.
listen=YES
#
# This directive enables listening on IPv6 sockets. To listen on IPv4 and IPv6
# sockets, you must run two copies of vsftpd with two configuration files.
# Make sure, that one of the listen options is commented !!
#listen_ipv6=YES

pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES

贊助商連結


goldie
2010-11-28, 03:13 PM
你有 allow local users 登入 ("local_enable=YES")
卻沒讓 local users 使用 chroot() 切換到自己的 home 目錄當做根目錄
("chroot_local_user=YES") 有可能會因為權限而衝突了。
把倒數第 24 行的 #chroot_local_user=YES 之前面的 # 註解拿掉看看。

kevin7326
2010-11-28, 03:28 PM
你有 allow local users 登入 ("local_enable=YES")
卻沒讓 local users 使用 chroot() 切換到自己的 home 目錄當做根目錄
("chroot_local_user=YES") 有可能會因為權限而衝突了。
把倒數第 24 行的 #chroot_local_user=YES 之前面的 # 註解拿掉看看。

還是不行的說:cry:

goldie
2010-11-28, 03:35 PM
會不會是你設了 userlist_enable=YES (倒數第2行)
跟 chroot_local_user=YES 又衝到了XD

剛注意到 #chroot_local_user=YES 那句上面有段話是…
If chroot_local_user is YES, then this list becomes a list of users to NOT chroot().

不過怪的是… 你也不是用他內建的
#chroot_list_enable=YES
#chroot_list_file=/etc/vsftpd/chroot_list
設定值…

kevin7326
2010-11-28, 03:48 PM
會不會是你設了 userlist_enable=YES (倒數第2行)
跟 chroot_local_user=YES 又衝到了XD

剛注意到 #chroot_local_user=YES 那句上面有段話是…
If chroot_local_user is YES, then this list becomes a list of users to NOT chroot().

不過怪的是… 你也不是用他內建的
#chroot_list_enable=YES
#chroot_list_file=/etc/vsftpd/chroot_list
設定值…
但是我查一下那個是說userlist_file名單裡面有的在打密碼之前就先拒絕掉
這名單裡面我沒設定東西阿orz


而且現在我仍然是原先的這個設定檔
但是打入帳號密碼
變成....
500 oops cannot change directory

匿名仍然是不能上傳檔案

goldie
2010-11-28, 03:54 PM
匿名仍然是不能上傳檔案
看來你要把這個 conf 檔瞄過一遍
anon_upload_enable=YES
anon_mkdir_write_enable=YES
你沒開,匿名當然不能上傳。
不過匿名本來就不該上傳,不然不安全。


而且現在我仍然是原先的這個設定檔
但是打入帳號密碼
變成....
500 oops cannot change directory
這點還真鬼異啊… 還是我又有哪裡的 conf 沒看清楚了。

對了,vsFTPd 的日誌檔應該是在 /var/log/vsftpd.log
你要不要邊看 log 、邊操作、邊 debug。

kevin7326
2010-11-28, 04:08 PM
看來你要把這個 conf 檔瞄過一遍
anon_upload_enable=YES
anon_mkdir_write_enable=YES
你沒開,匿名當然不能上傳。
不過匿名本來就不該上傳,不然不安全。


這點還真鬼異啊… 還是我又有哪裡的 conf 沒看清楚了。

對了,vsFTPd 的日誌檔應該是在 /var/log/vsftpd.log
你要不要邊看 log 、邊操作、邊 debug。

我那邊沒log檔的說:|||:

goldie
2010-11-28, 04:57 PM
懷疑是 userlist 沒設好…
你開了 userlist_enable=YES ,
且你有提到 /etc/vsftpd.user_list 是空的。
剛看了一下鳥哥的文章 (http://linux.vbird.org/linux_server/0410vsftpd.php#server_vsftpd.conf)


# userlist_enable=YES (NO)
是否藉助 vsftpd 的抵擋機制來處理某些不受歡迎的帳號,與底下的設定有關;

# userlist_deny=YES (NO)
當 userlist_enable=YES 時才會生效的設定,若此設定值為 YES 時,則當使用者帳號被列入到某個檔案時, 在該檔案內的使用者將無法登入 vsftpd 伺服器!該檔案檔名與下列設定項目有關。

# userlist_file=/etc/vsftpd.user_list
若上面 userlist_deny=YES 時,則這個檔案就有用處了!在這個檔案內的帳號都無法使用 vsftpd 喔!
看來是…
你只開了 userlist_enable=YES 會變成有加入 /etc/vsftpd.user_list 的帳號才能登入,
若是再開 userlist_deny=YES 的話,則是反過來,被加入的帳號會被封鎖。

而鳥哥他是兩個都開,也就是…
userlist_enable=YES
userlist_deny=YES
並在 /etc/vsftpd.user_list 加入兩行 root, bin
以方便限制系統帳號登入 (UID 小於 500,如 root, bin, ...)

kevin7326
2010-11-28, 05:00 PM
懷疑是 userlist 沒設好…
你開了 userlist_enable=YES ,
且你有提到 /etc/vsftpd.user_list 是空的。
剛看了一下鳥哥的文章 (http://linux.vbird.org/linux_server/0410vsftpd.php#server_vsftpd.conf)


# userlist_enable=YES (NO)
是否藉助 vsftpd 的抵擋機制來處理某些不受歡迎的帳號,與底下的設定有關;

# userlist_deny=YES (NO)
當 userlist_enable=YES 時才會生效的設定,若此設定值為 YES 時,則當使用者帳號被列入到某個檔案時, 在該檔案內的使用者將無法登入 vsftpd 伺服器!該檔案檔名與下列設定項目有關。

# userlist_file=/etc/vsftpd.user_list
若上面 userlist_deny=YES 時,則這個檔案就有用處了!在這個檔案內的帳號都無法使用 vsftpd 喔!
看來是…
你只開了 userlist_enable=YES 會變成有加入 /etc/vsftpd.user_list 的帳號才能登入,
若是再開 userlist_deny=YES 的話,則是反過來,被加入的帳號會被封鎖。

而鳥哥他是兩個都開,也就是…
userlist_enable=YES
userlist_deny=YES
並在 /etc/vsftpd.user_list 加入兩行 root, bin
以方便限制系統帳號登入 (UID 小於 500,如 root, bin, ...)

但是....
我那個名單沒去動過阿orz
難道我adduser就會自動加入?...................:|||:

goldie
2010-11-28, 06:52 PM
我的意思是,
你的 conf 並沒 userlist_deny=YES ,
且又 /etc/vsftpd.user_list 是空的,
當然沒人可以登入。