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-   -   VSFTPD & IDENT Lookups again (http://www.howtoforge.com/forums/showthread.php?t=6491)

trueshanti 28th August 2006 17:50

VSFTPD & IDENT Lookups again
 
Hi there,

i nearly read all discussions on VSFTPD and delayed logins , but still have not solution yet ...

my problem:

customers wait about 20 second after ftp-connection to enter their login .. well personaly i dont care , but the ISPConfig's tcpserver starts an ident request to the customers 113-port , waiting for answer,reject or timeout to proceed ..

so i need a heck to tell the tcpserver to let this be .. since it wraps around vsftpd and vsftpd itself has no options for ident-lookups , i suggest it is the tcpserver itself that performs this lookup

just to stop proftpd-topic-crossposters: i will stick to vsftpd !! no way for proftpd so far .. depends :- )

thanks4comment

best regards

-c-

Ben 29th August 2006 12:39

Well, I had the same problem and solved this with rejecting ident with iptables...
I use firehol (http://firehol.sf.net) as iptables abstraction, for that I only need that line:

Quote:

server ident reject with tcp-reset

trueshanti 30th August 2006 12:33

in my case i run ispconfig on a virtrual-server .. i dont have access to userspace firewalltables :-( .. i think there should be an option in some configfile for the tcp_server ..

falko 30th August 2006 16:05

What's in your /etc/vsftpd.conf?

trueshanti 31st August 2006 13:29

very unoffending config:

Code:

# Example config file /etc/vsftpd.conf
#
# The default compiled in settings are very paranoid. This sample file
# loosens things up a bit, to make the ftp daemon more usable.
#
# Allow anonymous FTP?
anonymous_enable=NO
#
# 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=002
#
# 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
#
anon_umask=002
#
#
#
# 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
#
chroot_local_user=YES
#
# 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


trueshanti 3rd September 2006 14:36

i also reject port 113 outgoing now ( to reject ident/auth pavkages ) , but still with login-delay .. :-(


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