IIS 5.0 FTP Error 426

Hello there,

I recently installed a FTP Server under Windows 2000 Advanced Server
(IIS 5).
I have also created a site, set the appropriate permissions on the
necessary files(a little bit too tighten, but...).
Before, there was another IIS FTP Server, on an NT 4.0 Server which
worked fine, no errors at the transfer.

There is no firewall or nat between the server and client.

The client is an unix system.
The client is in Passive Mode.

Connecting it with the FTP server, sometimes the file transfer below
can be accomplished, but sometimes i get the 426 Error.
This behaviour seems to be random.
When i get this error, the file is created, but the size is 0.



I have here one sample of an entry in the IIS

time c-ip cs-username cs-method cs-uri-stem cs-uri-query sc-status
sc-win32-status sc-bytes cs-bytes
21:04:18 10.197.2.186 ftpdsprod [186]created file.dat - 426 995 0 0


426 Connection closed; transfer aborted.

995 The I/O operation has been aborted because of either a thread exit
or an application request.


when the client is used in Active Mode, there's an error (client side)
every time:
500 Invalid PORT Command.
i am not able to get the exact PORT command used by the Client.

Anyone has an ideea of what the problem with IIS might be?

Thanks a lot,
Lucian

Paul
Thu Jan 29 08:25:38 CST 2004

On 21 Jan 2004 10:05:46 -0800, lucib23@lycos.com (LuciB) wrote:

>Hello there,
>
>I recently installed a FTP Server under Windows 2000 Advanced Server
>(IIS 5).
>I have also created a site, set the appropriate permissions on the
>necessary files(a little bit too tighten, but...).
>Before, there was another IIS FTP Server, on an NT 4.0 Server which
>worked fine, no errors at the transfer.
>
>There is no firewall or nat between the server and client.
>
>The client is an unix system.
>The client is in Passive Mode.
>
>Connecting it with the FTP server, sometimes the file transfer below
>can be accomplished, but sometimes i get the 426 Error.
>This behaviour seems to be random.
>When i get this error, the file is created, but the size is 0.
>
>
>
>I have here one sample of an entry in the IIS
>
>time c-ip cs-username cs-method cs-uri-stem cs-uri-query sc-status
>sc-win32-status sc-bytes cs-bytes
>21:04:18 10.197.2.186 ftpdsprod [186]created file.dat - 426 995 0 0
>
>
>426 Connection closed; transfer aborted.
>
>995 The I/O operation has been aborted because of either a thread exit
>or an application request.
>
>
>when the client is used in Active Mode, there's an error (client side)
>every time:
>500 Invalid PORT Command.
>i am not able to get the exact PORT command used by the Client.
>
>Anyone has an ideea of what the problem with IIS might be?
>
>Thanks a lot,
>Lucian

Lucian,

This would seem to suggest either a client side or possibly a network
problem. Try this KB article :

FTP Error: 500 Invalid PORT Command
http://support.microsoft.com/?id=281193


Regards,

Paul Lynch
MCSE

lucib23
Mon Feb 02 11:28:22 CST 2004

Lucian,

This would seem to suggest either a client side or possibly a network
problem. Try this KB article :

FTP Error: 500 Invalid PORT Command
http://support.microsoft.com/?id=281193


Regards,

Paul Lynch
MCSE

Hello Paul,

I think I found the problem, but i have no solution for it yet. I
wonder if u can help me here.

What i did are a couple of tests from the same machine to different
FTP servers, NT4 and Windows 2000. the results were that that the
client worked fine with an NT4.0 FTP server, but with Win 2000 it had
repeated the behaviour described above.

I installed a firewall on an 2K FTP server, and I logged the acesses
to the FTP server;
the Following was happening (client has 2 NIC's teamed together, fail
on fault after the admins of the system):
let's say the IP's are 192.168.1.199 and 192.168.1.200

1 192.168.1.199:1387 connects to srvIP:21
2 192.168.1.200:1388 connect to srvIP:5100
3 192.168.1.200:1389 connects to srvIP:21
4 192.168.1.199:1390 connects to srvIP:5101

So, do you have any ideea why this was working under IIS 4.0 and not
under IIS5?
And do u have any ideea if it's possible to change the FTP 5 (losing
the security) so that it will work like before?

thanks a lot,
Lucian