RVS4000 - FTP File Listing Failing

[kevinebrowne]

I am trying to determine why this router would cut off the connection to an FTP server when trying to generate an ascii listing of all the files. in the current directory.

RVS4000 4-Port Gigabit Security Router with VPN  version V01
Firmware Version: V1.3.2.0

And I have tried it also with a
Firmware Version: V2.0.0.3
Version 02 version of the same model RVS4000 router

I know that this is Router specific because I have been able to isolate the issue with just this router.
My other routers did not show this behavior.

When connecting to an FTP site or doing a refresh of the current directory the FTP it will list a portion of the files then return an error stating

"Could not get file list because connection was reset by the file server"

I have however eliminated the file server as the issue because it is only this router that has an issue communicating.

I saw this behavior with both Fetch and with Dreamweaver.

I even turned on and off passive mode to see if that would help.  But no help there.

I have turned off and on settings. in Firewall -> Basic Settings
but to no help.

THere are many more files in the folder starting with letters higher than "i".
But this router cuts off the connection before it will list them.

What rule or modification to the router do I need to perform to fix this issue?

Kevin Browne
University of California Natural Reserve System

Connecting to XXX.XXX.XXX.XXX port 21 (Mac OS X firewall is allowing connections) (3/18/11 10:27:11 AM)
Connected to XXX.XXX.XXX.XXX port 21 (3/18/11 10:27:13 AM)
220 XXX.XXX.XXX.XXX. FTP server ready.
USER XXXX
331 Password required for XXXX.
PASS
230--------------------------------------------------------------------------------
230-DARWIN Mac OS X Server's FTP server.
230-
230-FTP clients has successfully log in.
230-
230--------------------------------------------------------------------------------
230-
230 User XXXX logged in.
SYST
215 UNIX Type: L8 Version: BSD-199506
PWD
257 "/" is current directory.
MACB ENABLE
502 'MACB ENABLE': command not understood.
CWD /www.XXXX.org/
250 CWD command successful.
PWD
257 "/www.XXXX.org" is current directory.
CWD /www.XXXX.org
250 CWD command successful.
PWD
257 "/www.XXXX.org" is current directory.
TYPE A
200 Type set to A.
PORT 192,168,1,90,227,6
200 PORT command successful.
LIST
150 Opening ASCII mode data connection for directory listing.
total 833200
drwxr-xr-x   56 XXXX  XXXX       1904 Nov 21  2009 AnnReports
drwxr-xr-x    7 XXXX  XXXX        238 Aug 11  2008 BasinFire7_17
-rw-r--r--    1 XXXX  XXXX       9083 Aug 11  2008 BasinFireAerials.html
drwxr-xr-x    8 XXXX  XXXX        272 Aug 10  2008 BasinPicsAug08
-rw-r--r--    1 XXXX  XXXX    4962980 Nov 10  2009 Bathroom.jpg
drwxrwxr-x   15 XXXX  XXXX        510 May 20  2010 Birds
-rwxrwxr-x    1 XXXX  XXXX       4162 Sep 24  2007 Blogtemplate.htm
drwxr-xr-x    4 XXXX  XXXX        136 Nov 25  2008 Brochures
drwxrwxr-x    7 XXXX  XXXX        238 Nov 10  2009 Bryophytes
-rw-r--r--    1 XXXX  XXXX      10851 Aug  9  2010 CementSpringAnimals.html
drwxr-xr-x    7 XXXX  XXXX        238 Aug  9  2010 CementSpringCam
-rw-r--r--    1 XXXX   XXXX       1024 Aug  9  2010 Cement_Spring_Camera.wmv.bin
drwxrwxr-x   15 XXXX  XXXX      510 Nov 10  2009 Contacts
-rw-r--r--    1 XXXX  XXXX      28474 Dec 20  2008 December2008.htm
-rwxrwxr-x    1 XXXX  XXXX     117152 Sep 24  2007 DeerCam.jpg
-rwxrwxr-x    1 XXXX  XXXX     116998 Sep 24  2007 DeerCamArchive.jpg
-rwxrwxr-x    1 XXXX  XXXX      32182 Sep 24  2007 DeerCamMini.jpg
drwxrwxr-x    6 XXXX  XXXX        204 Aug 30  2007 DropBox
-rw-r--r--    1 XXXX  XXXX   17223880 Dec  7  2007 Fetch_5.3.dmg
-rw-r--r--    1 XXXX  XXXX    4338370 Apr  4  2009 FieldStations.pdf
-rwxrwxr-x    3 XXXX   XXXX       1024 Aug  8  2007 FileMaker Pro 9 Installer.dmg
-rwxrwxr-x    1 XXXX  XXXX  340325488 Sep 24  2007 FileMaker8.5.dmg
drwxr-xr-x    4 XXXX   XXXX        136 Nov 12  2009 Finch
-rw-r--r--    1 XXXX  XXXX       3252 Nov 10  2009 FinchCreek.html
-rw-r--r--    1 XXXX  XXXX     186163 Nov 10  2009 FinchCreek.jpg
drwxr-xr-x    3 XXXX  XXXX        102 Dec 14  2007 Fire
drwxrwxr-x   20 XXXX  XXXX        680 Aug 30  2007 Geology
-rwxrwxr-x    1 XXXX  XXXX      57042 Dec 10 14:12 HastVu.jpg
drwxrwxr-x  289 XXXX  XXXX       9826 May 16  2010 HastVuArchiveFolder
-rwxrwxr-x    1 XXXX  XXXX      18538 Jun 10  2010 HastVuMini.jpg
-rw-r--r--    1 XXXX  XXXX      24064 Nov 10  2009 HastingWebCam Script.doc
-rw-r--r--    1 XXXX  XXXX   18835668 Dec 11  2008 HastingsTulipStory.mp4
drwxrwxr-x    7 XXXX  XXXX        238 Feb  7  2010 Herps
drwxr-xr-x    6 XXXX  XXXX        204 Apr 11  2010 History-NRS
drwxrwxr-x   33 XXXX  XXXX       1122 Apr 11  2010 HistoryWebHNHR
drwxrwxr-x   18 XXXX  XXXX        612 Aug 30  2007 Housing
drwxrwxr-x   56 XXXX  XXXX       1904 Apr 15  2010 ImagesAllWebsite
-rw-r--r--    1 XXXX  XXXX      11832 Dec 12 16:12 Index.html
ftp_list: 1,54 (state == GETTING_LIST)
PWD
226 Transfer complete.

[mpyhala]

Hi Kevin,

Thanks for posting. This is an unusual issue you have and sounds like maybe a packet fragmentation problem. What type of internet connection do you have? Is the MTU in the router set to Auto?

[kevinebrowne]

I was on phone with Cisco all day.  And they are going to escalate the issue.

I saw the same response from my windows machine when I used FTP:// instead of HTTP:// in firefox.

It listed a few files then as it tried to load the rest the page (file list) it changed to an error page staing that

"The Connection was Reset"

"The Connection to the server was reset while the page was loading"

It did not matter if I FTP'ed to a Mac server or a Win server.

You are correct to suspect the connection

We are on a satellite for Hughes.

I am suspecing that this router is impatient and is not waiting long enough for the handshake.

But we can not find the setting that we can change to help this.

MTU is on Auto though.

Do you think if I set it to a value it might help?

I hope that this insident will result in a fix (settings change) or new firmware,

or at the very least cisco testing thier equipment on connections with a high latency. 

Any recommendations as what I should replace this router with?

[mpyhala]

Kevin,

I would certainly check the MTU, especially with satellite. I just responded to another question and explained how to check the MTU and adjust it in your router:

https://supportforums.cisco.com/message/3318881#3318881

[kevinebrowne]

Tried as you described to set the MTU.

Tested as you described

Went down as low as 1024 before it would stop giving me

Request Timed Out.

Reset the router using Manual MTU at 1024

But the FTP issue still remained.

THanks for the info but it seems to have not fixed the FTP file listing issue with our satellite connection latency.

Kevin