IIS FTP server reply portLocked
I have a problem where a remote office with strict firewalling is FTPing into an FTP server of mine on a custom port e.g. 12345
The client is able to connect to the server and sign in but when they issue a ‘put’ command they receive an error message: 500 Invalid PORT Command. MS KB article 281193 describes this problem but doesn’t rely offer a resolution. Essentially the server is returning traffic to the client on a dynamic port and the client side security is blocking the traffic returningfrom the server
Can anyone offer me a work around for this problem or even better tell me how I can configure my win2k IIS FTP server to only return FTP traffic on a specific port (not a dynamically created one) so the remote site firewall can’t block the traffic?
Please don’t offer an answer unless you’ve got a decent one.