> How can I change the data port?
> This seems to be always chosen by the client incoming.

In no passive mode, yes it is always the same port.

> PASV makes no difference.

Sure it make a difference. In PASV mode, the server select the port and 
accept connections on that port.

Have a look at the PasvPortRangeStart and PasvPortRangeSize properties. It 
allows you to select the port range used by the server to reply to the 
client PASV requests. Use a large enough range or you'll have problem when 
too much clients are connected.

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The author of the freeware Internet Component Suite (ICS)
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----- Original Message ----- 
From: "John Preston" <[EMAIL PROTECTED]>
To: "ICS support mailing" <twsocket@elists.org>
Sent: Thursday, August 02, 2007 1:41 PM
Subject: [twsocket] 501 Cannot STOR. Error 10053 from McAfee on data port


Hi,

I have a problem with an FTP server based on Fran├žois's sample, which I use.

I added a port change capability to allow the server to run on a user 
selected port, rather than 21, as there is a copy of McAfee VirusScan 
Enterprise + Anti-Spyware Module 8.0.0 present, and it is configures to 
block FTP inbound on ports 20-21. Now incoming FTPs work fine on all ports 
when the port blocking rule is disabled, but when it is enabled (it says 
"stops viruses such as Nimda spreading") then everything works up until a 
STOR command is issued by the client, at which point the transfer fails with 
the error:

501 Cannot STOR. Error 10053 in function connect

This I believe is because I haven't changed the data port, only the control 
port for the server.

How can I change the data port? This seems to be always chosen by the client 
incoming. PASV makes no difference.

Thanks in advance,

John Preston


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