Problemas al bajar archivos grandes a un router CISCO con VSFTPD

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Mi problema es el siguiente, he instalado vsftpd (FTP Server) en mi portatil para poder bajar archivos de IOS o cualquier clase de archivo, hacia un router cisco.

Puedo subir archivos grandes o pequeños sin ningun problema

OCCI_BDI0569#copy flash:home.tar ftp://cisco:cisco@192.168.150.2/
Source filename [home.tar]?
Address or name of remote host [192.168.150.2]?
Destination filename [home.tar]?
Writing home.tar !!!!!!!!!!!!!!!!!!!!!!!
113152 bytes copied in 0.408 secs (277333 bytes/sec)

pero cuando intento bajar un archivo grande del servidor ftp (vsftpd) hacia el router cisco se queda pegado accediendo al servidor:

OCCI_BDI0569#copy ftp://cisco:cisco@192.168.150.2/SampleAudioSource.ALAW.wav flash:
Address or name of remote host [192.168.150.2]?
Source filename [SampleAudioSource.ALAW.wav]?
Destination filename [SampleAudioSource.ALAW.wav]?
Accessing ftp://cisco:cisco@192.168.150.2/SampleAudioSource.ALAW.wav...

Despues cuando decido reiniciar el servidor ftp:

[whatta@hegoat]$ sudo /etc/rc.d/vsftpd restart
:: Stopping vsftpd FTP Daemon [DONE]
:: Starting vsftpd FTP Daemon [DONE]

Aparece el error de "Connection timed out":

OCCI_BDI0569#copy ftp://cisco:cisco@192.168.150.2/SampleAudioSource.ALAW.wav f$
Address or name of remote host [192.168.150.2]?
Source filename [SampleAudioSource.ALAW.wav]?
Destination filename [SampleAudioSource.ALAW.wav]?
Accessing ftp://cisco:cisco@192.168.150.2/SampleAudioSource.ALAW.wav...
%Error reading ftp://cisco:cisco@192.168.150.2/SampleAudioSource.ALAW.wav (Connection timed out)

El usuario se encuentra configurado en /etc/passwd:

cisco:x:1001:1001::/home/ftp/cisco:/sbin/false

Existe conectividad entre el router y el servidor:

OCCI_BDI0569#ping 192.168.150.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.150.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

Tengo configurado en /etc/hosts.allow:

# /etc/hosts.allow
#
vsftpd: ALL

# End of file

Mi archivo de configuración de vsftpd es:

# Use this to use vsftpd in standalone mode, otherwise it runs through (x)inetd
listen=YES
#
# 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=6000
#
# You may change the default value for timing out a data connection.
#data_connection_timeout=1200
#
# 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

ftp_username=whatta

################################################################

Lo mas raro de todo es que sí me deja bajar archivos muy pequeños como por ejemplo archivos de 4K:

OCCI_BDI0569#copy ftp://cisco:cisco@192.168.150.2/prueba.txt flash:
Address or name of remote host [192.168.150.2]?
Source filename [prueba.txt]?
Destination filename [prueba.txt]?
%Warning:There is a file already existing with this name
Do you want to over write? [confirm]
Accessing ftp://cisco:cisco@192.168.150.2/prueba.txt...
Loading prueba.txt !
[OK - 4128/4096 bytes]

Por favor, Alguien podria ayudarme con este inconveniente, llevo ya 3 dias seguidos y no he podido dar con la solucion.

Gracias de antemano por quien pueda ayudarme.

Que sucede si subes el

Imagen de RazaMetaL

Que sucede si subes el archivo desde una pc con un cliente vsftp? logras ver algo en el log del servidor ftp?

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