Since 21CN FTP problem

[#1]

Hi all, Anybody had FTP problems since migrating to 21CN.
On some hosts i can use FTP and on others the FTP Client cannot retreive LIST. This is debug log Filezilla.
Response: 257 "/public/www" is current directory.
Trace: CFtpControlSocket::ResetOperation(0)
Trace: CControlSocket::ResetOperation(0)
Trace: CFtpControlSocket::ParseSubcommandResult(0)
Trace: CFtpControlSocket::ListSubcommandResult()
Trace:   state = 1
Trace: CFtpControlSocket::SendNextCommand()
Trace: CFtpControlSocket::TransferSend()
Trace:   state = 2
Command: PASV
Trace: CFtpControlSocket::OnReceive()
Response: 227 Entering Passive Mode (195,8,66,1,20,207).
Trace: CFtpControlSocket::TransferParseResponse()
Trace:   code = 2
Trace:   state = 2
Trace: CFtpControlSocket::SendNextCommand()
Trace: CFtpControlSocket::TransferSend()
Trace:   state = 4
Command: LIST
Trace: CTransferSocket::OnConnect
Trace: CTransferSocket::OnReceive(), m_transferMode=0
Trace: CFtpControlSocket::OnReceive()
Response: 150 Opening ASCII mode data connection for file list
Trace: CFtpControlSocket::TransferParseResponse()
Trace:   code = 1
Trace:   state = 4
Trace: CFtpControlSocket::SendNextCommand()
Trace: CFtpControlSocket::TransferSend()
Trace:   state = 5
Trace: CTransferSocket::OnReceive(), m_transferMode=0
Listing: drwxr-xr-x  22 (?)      (?)          4096 Jun  2 18:40 .
Listing: drwxr-xr-x  4 (?)      (?)          2048 Nov  8  2005 ..
Listing: -rw-r--r--  1 (?)      (?)          4941 Nov 18  2007 .htaccess
Listing: -rw-r--r--  1 (?)      (?)        104874 May 22  2008 CHANGELOG.php
Listing: -rw-r--r--  1 (?)      (?)          3429 Nov 18  2007 COPYRIGHT.php
Listing: -rw-r--r--  1 (?)      (?)          4376 Nov 18  2007 INSTALL.php
Listing: -rw-r--r--  1 (?)      (?)        17977 Nov 18  2007 LICENSE.php
Listing: drwxr-xr-x  2 (?)      (?)          2048 Nov 18  2007 _notes
Listing: drwxr-xr-x  9 (?)      (?)          2048 Dec 17 14:25 administrator
Listing: drwxr-xr-x  11 (?)      (?)          2048 Apr 23 09:45 budget
Listing: drwxr-xr-x  11 (?)      (?)          2048 Jun 11  2008 busmatters
Listing: drwxr-xr-x  2 (?)      (?)      3190784 Jun  3 08:21 cache
Listing: -rw-r--r--  1 (?)      (?)          2249 Nov 18  2007 calcs.html
Listing: drwxr-xr-x  2 (?)      (?)          2048 Apr 10  2004 cgi-bin
Listing: drwxr-xr-x  29 (?)      (?)          4096 Jun  1 16:02 components
Error: Connection timed out
Trace: CControlSocket::DoClose(2050)
Trace: CFtpControlSocket::ResetOperation(2114)
Trace: CControlSocket::ResetOperation(2114)
Trace: CFtpControlSocket::ResetOperation(2114)
Trace: CControlSocket::ResetOperation(2114)
Error: Failed to retrieve directory listing
Trace: CFileZillaEnginePrivate::ResetOperation(2114)
I can log into all hosts.

• i have turned off my router FIREWALL,


• My PC is DMZ


• Uninstalled NIS2009 and tried again


• Tried ACTIVE mode


• Tried  different FTP Clients


• Tried SFTP

Tried BPFTP client when entering the folder it seems to list folders above but thats it( bottom left of screen Bytes/sec reduces to 4/8 bytes/sec) .
Its a Joomla site, so installed joomla xplorer. Can see all the folder/files without a problem.
Just cannot get into some folders.....its weird. Maybe nothing to do with 21CN because i have installed a new BELKIN N+ router (only other thing that has changed since i could get in)but the bytes/sec seem to point to the broadband?
If it was on a windows home PC i would chkdsk for corruption.....but?
Regards Steve

[#2]

Update: Router is Pooh
My brand spanking new Belkin N+ is the problem (seeing what belkin come up with). I assumed,  stupidly, that the new router was working correctly.
Just in case they cant fix the firmware.....can anybody recommend a pro Wireless N ADSL2+ Modem router that works with FTP:)

[#3]

Router not pooh. Line pooh
After consultation with Belkin......i changed the MTU from 1432 to 1500.  FTP working properly now.
Anybody know what the most optimised MTU should be set to for 21CN???? Any programs that will test for me ( VISTA mug).

[#4]

I'd generally go with 1430 to be honest!
It's possible that there was an MTU discrepancy between your computer and your router, which could have caused the problems you were seeing.

[#5]

So whats best in your view James/anybody , change vista to MTU 1430 and the router.....or leave at 1500 on both?
Is there a program like DrTcp that runs on vista to optimise for the 21cn line?

I think Vista is supposed to adjust to the optimal MTU anyway???

[#6]

As far asd I know, Vista optimises the rWin but I'm not sure about MTU.
I use 1430 on both router and computer and it works fine.  Not sure what you can use with Vista though.  I'm still on XP.

[#7]

Just found this http://www.kitz.co.uk/adsl/vistaMTU.htm.
I think i will get my work done before i try it, unless i start losing sync again. Two weeks of blaming everybody, i am exhausted. Thats why i posted the fix just in case someone else gets as confused as me

[#8]

Quote from: Jameseh

Not sure what you can use with Vista though.  I'm still on XP.

Your lucky,  you still get alert boxes that gave you clues to whats happening. I remember them, those where the days.

[#9]

Last couple of paragraphs here http://www.kitz.co.uk/adsl/MTU.htm dicuss MTU size on router v. PC. I'm currently running PC value of 1460 and router value 1500 and all seems to be working OK.

[#10]

Hi, yes i think i will drop the MTU by ten or so every week until i cannot FTP properly again. At least i have a way of checking now (FTP)
I think the only problem i had was with ftp sites so most people would not noticed  any  problems(web browsing, email etc ok).
It was a very odd problem, of course makes total sense now.