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Old 07-26-2005, 07:57 AM   #1
carlosinfl
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vsFTPd Problem


I am able to login to my FTP server and see my local directory for the user I am logged in as (pwd command).

As you can see I am able to talk to the FTP server since it lets me login and then puts me in the correct file path (/home/carlos).

Can someone tell me what the issue is?

http://i4.photobucket.com/albums/y14.../ftp_error.png

I also get the same error via a GUI FTP client.
 
Old 07-26-2005, 08:50 AM   #2
akudewan
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Post your /etc/vsftpd.conf file here. Also see your /var/log/vsftpd.log for errors

Is this happening only on the windows machine? or the linux box too?
 
Old 07-26-2005, 09:23 AM   #3
carlosinfl
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I don't have another Linux machine to test this from to see if it is a Windows problem so I have created a generic account if anyone would like to try and login.

http://carlwill.dyndns.org

Username = linuxusr
Password = ftptest

In the /home/linuxusr dir. there is a linux.GIF file and I would like to know if anyone is able to download this file and or upload a file to this directory. Please let me know the results or attempts.

Here is my vsftpd.conf

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
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 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=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_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

Last edited by carlosinfl; 07-26-2005 at 09:27 AM.
 
Old 07-26-2005, 09:24 AM   #4
deoren
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Show the output from

Code:
ls -l /home/carlos/pics/drunk.JPG

ls -l /home/carlos/pics
 
Old 07-26-2005, 09:29 AM   #5
deoren
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It's hanging with ls whether I use passive or not. Usually this is a firewall issue.
 
Old 07-26-2005, 09:39 AM   #6
carlosinfl
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Code:
[root@carlwill /]# su carlos
[carlos@carlwill /]$ cd /home/carlos/
[carlos@carlwill ~]$ ls -l /home/carlos/
total 1244
drwxr-xr-x  2 carlos carlos    4096 Jul 22 18:31 Desktop
-rw-rw-r--  1 carlos carlos 1232876 Jul 21 19:11 Firefox_wallpaper.png
-rw-rw-r--  1 carlos carlos   20569 Jul 22 17:07 linux.gif
drwxr-xr-x  2 carlos carlos    4096 Jul 25 17:30 pics
drwxr-xr-x  2 carlos carlos    4096 Jul 25 17:19 public_html
[carlos@carlwill ~]$ ls -l /home/carlos/pics/drunk.jpg
-rw-rw-r--  1 carlos carlos 130230 Apr  1 08:29 /home/carlos/pics/drunk.jpg
 
Old 07-26-2005, 09:39 AM   #7
carlosinfl
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Quote:
Originally posted by deoren
It's hanging with ls whether I use passive or not. Usually this is a firewall issue.
How do I disable the firewall?
 
Old 07-26-2005, 09:52 AM   #8
deoren
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Quote:
-rw-rw-r-- 1 carlos carlos 20569 Jul 22 17:07 linux.gif
Permissions look okay.

Quote:
-rw-rw-r-- 1 carlos carlos 130230 Apr 1 08:29 /home/carlos/pics/drunk.jpg
Same here.

Here is the config file without comments (easier to read)

Quote:
anonymous_enable=YES
local_enable=YES
write_enable=YES
local_umask=022
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
xferlog_std_format=YES

pam_service_name=vsftpd
userlist_enable=YES
listen=YES
tcp_wrappers=YES
Do this:

Code:
cd /home/
ls -l
What are your goals for this ftp server? Both anonymous and local user logins? Or just anonymous?
 
Old 07-26-2005, 09:57 AM   #9
carlosinfl
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Code:
[linuxusr@carlwill root]$ cd /home/
[linuxusr@carlwill home]$ ls -l
total 12
drwx--x--x  30 carlos   carlos   4096 Jul 25 17:43 carlos
drwxr-xr-x   2 laura    laura    4096 Jul 15 18:04 laura
drwxr-xr-x   2 linuxusr linuxusr 4096 Jul 26 09:17 linuxusr
I want users to be able to login to my ftp server by a account only which has been created on the FTP server and be able to upload and download to the machine. Those are my basic goals for the FTP server but right now I am not even able to download or see directories as the user I am logging in as...
 
Old 07-26-2005, 10:02 AM   #10
deoren
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Quote:
How do I disable the firewall?
If you're using iptables on your box you'll want to have the ftp module loaded

Code:
# load ftp connection tracking module if it isn't already loaded
if [ ! `lsmod 2>/dev/null | grep -q "ip_conntrack_ftp"` ]; then
    modprobe ip_conntrack_ftp ports=21
fi

# load ftp nat module if it isn't already loaded
# From my own trial and efforts, this module is needed
# in order to successfully do a list on a remote host.
# This is because with passive ftp the server tells
# the client which high unprivileged port the client
# needs to connect to.  Without (either this one or 
# above module, not sure which) the module, you would
# have to allow outgoing requests from all unprivileged
# ports. 
# https://lists.netfilter.org/pipermai...ay/011604.html
if [ ! `lsmod 2>/dev/null | grep -q "ip_nat_ftp"` ]; then
    modprobe ip_nat_ftp ports=21
fi
I'm not sure if that is an issue or not. I would think FC4 would load the modules for you automatically via the iptables init script.

The above checks for the netfilter ftp modules and if they are not already loaded will load them.

If you wanted to temporarly disable the firewall you could run

Quote:
# /etc/init.d/iptables stop
I would suggest doing so with your Internet connection down though. Once you do that then you could try to login via your LAN and grab the file.

You may want to post the contents of your vsftpd log as well.

Have you tried logging in locally (ssh, keyboard) and trying ftp 127.0.0.1 and using the username/password specified?
 
Old 07-26-2005, 10:11 AM   #11
deoren
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Are there any files inside of /home/linuxusr/ ?

I see that linux.gif and drunk.jpg are in /home/carlos/
 
Old 07-26-2005, 10:27 AM   #12
carlosinfl
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no, the only file in /home/linuxusr is that linux.GIF.

/home/carlos/pics/drunk.JPG is under carlos but for some reason I can't download them...

I don't know anything about IPtables so I am still lost.
 
Old 07-26-2005, 10:30 AM   #13
deoren
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Humor me if you would:

Code:
cd /home/linuxusr/
ls -l
 
Old 07-26-2005, 10:47 AM   #14
deoren
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Here is a working anonymous only, passive only vsftpd config file.

In addition it only allows 3 users (each user uses 2 connections: 1 data + 1 control) each limited to 11KB/s download.

ftp has group ownership on the folder, and permissions are set to 755 on that same folder.

Additional security may come from placing the ftp folder on a partition that has execute permissions disabled, but I am not totally sure of that.

Make sure that the user account exists for the no_priv user also. Last but not least
Code:
man vsftpd.conf
for details of the directives used.

Code:
# Based off of /usr/share/doc/vsftpd-1.2.2/examples/INTERNET_SITE_NOINETD/vsftpd.conf

################################################
# Standalone mode
################################################
listen=YES
background=YES
max_clients=6
max_per_ip=2

################################################
# Access rights
################################################
anonymous_enable=YES
no_anon_password=YES
anon_root=/home/ftp
# This is the name of the user we use for handling anonymous FTP. The home directory of this user
# is the root of the anonymous FTP area.
ftp_username=ftp
local_enable=NO
write_enable=NO
anon_upload_enable=NO
anon_mkdir_write_enable=NO
anon_other_write_enable=NO

################################################
# Security
################################################
anon_world_readable_only=YES
connect_from_port_20=NO
pasv_enable=YES
pasv_promiscuous=NO
port_enable=NO
session_support=NO
hide_ids=YES
pasv_min_port=50000
pasv_max_port=60000
# 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=ftp

################################################
# Features
################################################
# If  enabled, then any log output which would have gone to /var/log/vsftpd/vsftpd.log goes to the
# system log instead. Logging is done under the FTPD facility.
syslog_enable=YES
xferlog_enable=YES
xferlog_std_format=YES
xferlog_file=/var/log/vsftpd/vsftpd-xfer.log
ls_recurse_enable=NO
ascii_download_enable=NO

# 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=NO
banner_file=/etc/vsftpd/ftp.message
listen_port=21
dirmessage_enable=YES

################################################
# Performance
################################################
#      one_process_model
# If you have a Linux 2.4 kernel, it is possible to use a different security model which only uses
# one process per connection. It is a less pure security model, but  gains  you  performance.  You
# really don't want to enable this unless you know what you are doing, and your site supports huge
# numbers of simultaneously connected users.
one_process_model=NO
idle_session_timeout=120
data_connection_timeout=300
accept_timeout=60
connect_timeout=60
anon_max_rate=11000
 
Old 07-27-2005, 01:19 PM   #15
deoren
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Did that config help you any? vsftpd still giving you problems?
 
  


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