Hi,

I have a problem with an FTP server based on François'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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