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VSFTP on Ubuntu 12.04.4 error: 500 priv_sock_get_result

Posted on 2014-04-08
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Last Modified: 2014-04-15
Here is all I did:

I installed Ubuntu Server 12.04.4 in a VirtualBox.  Network is bridged.  Then I ran:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install vsftpd

Then I edited /etc/vsftpd.conf and uncommented local_enable=YES and write_enable=YES.  
Saved the config.
sudo service vsftpd restart
sudo ufw disable  (for good measure)

So then I go into Filezilla on the host machine and try to connect, but this is what I get:

Status:      Connecting to 192.168.1.91:21...
Status:      Connection established, waiting for welcome message...
Response:      220 (vsFTPd 2.3.5)
Command:      USER jsmith99
Response:      331 Please specify the password.
Command:      PASS *********
Response:      500 OOPS: priv_sock_get_result
Error:      Critical error
Error:      Could not connect to server


Any ideas on what the heck am I doing wrong?  I'm pretty sure this has worked for me very easily in the past, although it's been a while.  And I don't remember if I've done it in Virtualbox before.

Any help is appreciated!  Thanks.

[edited my username out]
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Question by:lou6150
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Expert Comment

by:omarfarid
ID: 39987953
Can you try to do below command and see if you get same error:

ftp 0
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Author Comment

by:lou6150
ID: 39989187
Omarfarid:  It seems to give me the same problem.  Here is what I get when I do an ftp 0 locally.

Connected to 0.
220 (vsFTPd 2.3.5)
Name (0:jsmith99):
331 Please specify the password.
Password:
500 OOPS: 421 Service not available, remote server has closed connection
Login failed.
No control connection for command: No such file or directory

In case it matters, I should also mention that during installation at the software selection screen, I chose OpenSSH, LAMP, and Samba server options to install.  But I didn't configure anything after that.
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Expert Comment

by:omarfarid
ID: 39989577
is selinux or similar installed and enabled on your system?
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Author Comment

by:lou6150
ID: 39989671
No.  This is a really fresh install of Ubuntu, and the only things I've done are listed above.  My understanding is that SELinux is not installed by default.

I think Ubuntu comes with AppArmor, but I don't believe it is enabled by default.  And I certainly haven't done anything to enable or configure it... at least not on purpose.
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Expert Comment

by:omarfarid
ID: 39989690
can you post the vsftp config file ?
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Author Comment

by:lou6150
ID: 39989739
# Example config file /etc/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.
#
#
# Run standalone?  vsftpd can run either from an inetd or as a standalone
# daemon started from an initscript.
listen=YES
#
# Run standalone with IPv6?
# Like the listen parameter, except vsftpd will listen on an IPv6 socket
# instead of an IPv4 one. This parameter and the listen parameter are mutually
# exclusive.
#listen_ipv6=YES
#
# 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
#
# If enabled, vsftpd will display directory listings with the time
# in  your  local  time  zone.  The default is to display GMT. The
# times returned by the MDTM FTP command are also affected by this
# option.
use_localtime=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 restrict local users to their home directories.  See the FAQ for
# the possible risks in this before using chroot_local_user or
# chroot_list_enable below.
#chroot_local_user=YES
#
# 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().
# (Warning! chroot'ing can be very dangerous. If using chroot, make sure that
# the user does not have write access to the top level directory within the
# 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
#
# Customization
#
# Some of vsftpd's settings don't fit the filesystem layout by
# default.
#
# This option should be the name of a directory which is empty.  Also, the
# directory should not be writable by the ftp user. This directory is used
# as a secure chroot() jail at times vsftpd does not require filesystem
# access.
secure_chroot_dir=/var/run/vsftpd/empty
#
# This string is the name of the PAM service vsftpd will use.
pam_service_name=vsftpd
#
# This option specifies the location of the RSA certificate to use for SSL
# encrypted connections.
rsa_cert_file=/etc/ssl/private/vsftpd.pem
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Expert Comment

by:omarfarid
ID: 39989808
can you try to login as  anonymous user and see if you get error?
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Author Comment

by:lou6150
ID: 39990030
Yes. I was able to connect anonymously.

Status:      Connecting to 192.168.1.91:21...
Status:      Connection established, waiting for welcome message...
Response:      220 (vsFTPd 2.3.5)
Command:      USER anonymous
Response:      331 Please specify the password.
Command:      PASS **************
Response:      230 Login successful.
Command:      OPTS UTF8 ON
Response:      200 Always in UTF8 mode.
Status:      Connected
Trace:      Measured latency of 5 ms
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Expert Comment

by:omarfarid
ID: 39990556
Can you disable anonymous login , restart vsftpd , then try to login with normal user account?
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Author Comment

by:lou6150
ID: 39990688
Still no luck.

I set anon_upload_enable=NO  and then restarted the service.

I still can't login with either a regular user, or anonymously now.
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Expert Comment

by:omarfarid
ID: 39990705
Are you root jailing users?

Try to see if dir below exists

/var/run/vsftpd/empty

otherwise comment below line

secure_chroot_dir=/var/run/vsftpd/empty
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Assisted Solution

by:omarfarid
omarfarid earned 500 total points
ID: 39990772
please compare your vsftpd.conf file with

http://www.wikihow.com/Set-Up-vsftpd-FTP-on-Ubuntu-Linux

Below link is help page for vsftp conf on ubuntu

https://help.ubuntu.com/community/vsftpd
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Accepted Solution

by:
lou6150 earned 0 total points
ID: 39992117
Got it working!  Just to be crazy, I changed

pam_service_name=vsftpd

to

pam_service_name=ftp

...because I have seen a few times that in older versions the default value was ftp.  This made it work!

I looked at my other Ubuntu 12.04 servers, and they use PAM service name of vsftpd...  and ftp works just fine on them.  So I'm not sure what that means.  But I am happy it is fixed.
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Author Comment

by:lou6150
ID: 39992137
Thanks for your help Omar!  Although I initially rolled my eyes when you sent me reference material, it ended up helping me to try this.  Thanks for sticking with me.
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Expert Comment

by:omarfarid
ID: 39993230
Welcome :)
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Author Closing Comment

by:lou6150
ID: 40001136
It works!
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