Vsftpd Upload Problems


#1

I am struggling to get vsftpd to perform a documented feature and I am at wits end. I have scoured the Internet, read the FAQ, and believe that I have configured the vsftpd.conf file correctly but still do not have the correct functionality. I am running Fedora Core 4, with vsftpd-2.0.3-1.

I have setup vsftpd.conf for anonymous uploads to /var/ftp/pub/upload. The permissions on the upload directory are drwxrwx-wx. The permissions on /var/ftp/ and all other subdirectories below it, excluding /var/ftp/pub/upload, are drwxrwxr-x. In vsftpd.conf I have also set:

local_umask=0022
anon_umask=0007
file_open_mode=0777

Normal FTP download functions work fine and anonymous uploads work. I have two questions.

  1. If I change the permissions on /var/ftp/pub/upload to drwxrwx-w-, uploads cease to function. Documentation shows that this should work but does not. Is this indeed the how things should work or do I have a problem?

  2. On anonymous upload to /var/ftp/pub/upload, the permissions on the uploaded file come back as -rw------- with a group name of ftp. All efforts to change these permissions per anon_umask and file_open_mode have failed. I want the permissions on uploaded files to be rwxrwx— with a group name of ftp-users. What can I do make this work?

A copy of my full vsftpd.conf file is listed below. Any help would be greatly appreciated.

– mache

[code]# 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=0022
anon_umask=0007
file_open_mode=0777

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=mache

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

xferlog_std_format=NO

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 turning on ascii_download_enable enables malicious remote parties

to consume your I/O resources, by issuing the command “SIZE /big/file” in

ASCII mode.

These ASCII options are split into upload and download because you may wish

to enable ASCII uploads (to prevent uploaded scripts etc. from breaking),

without the DoS risk of SIZE and ASCII downloads. ASCII mangling should be

on the client anyway…

#ascii_upload_enable=YES
#ascii_download_enable=YES

You may fully customise the login banner string:

ftpd_banner=digit FTP

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_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

pam_service_name=vsftpd
userlist_enable=YES
#enable for standalone mode
listen=YES
tcp_wrappers=YES[/code]