FTP Connection Refused

Status: Resolving address of usegalaxy.org Status: Connecting to 129.114.60.60:21... Status: Connection established, waiting for welcome message... Status: Initializing TLS... Status: Verifying certificate... Status: TLS connection established. Status: Logged in Status: Retrieving directory listing... Command: PWD Response: 257 "/" is the current directory Command: TYPE I Response: 200 Type set to I Command: PASV Response: 227 Entering Passive Mode (129,114,60,60,118,87). Command: MLSD Error: The data connection could not be established: ECONNREFUSED - Connection refused by server

14 months ago by

Nate Coraor ♦ 3.2k

United States

Nate Coraor ♦ 3.2k wrote:

Is there a firewall at your site that might be interfering? It seems like something - either on the host or on that particular network - is blocking connections.

In order to make a passive FTP connection, the FTP client opens a connection to a control channel: port 21 in the case of Explicit FTPS or non-secure connections, port 990 in the case of Implicit FTPS. After authenticating, the client attempts to switch to passive mode - the PASV command. This instructs the FTP server on our side to create a random port (in our case, this will be between 30000 and 31000) for your client to connect to for data transfers. FileZilla attempts to get a directory listing from the data port with MLSD but times out when attempting to connect to the data port.

There could be multiple reasons for this, however, I suspect the reason is that some firewalls inspect traffic to (remote) port 21 and watch for the response to the PASV command so they can allow outbound traffic from the client to the data port returned by PASV (in this case IP: 129.114.60.60 port: 118*256+87=30295). Since the connection becomes encrypted after issuing AUTH TLS, the firewall cannot read the PASV response and thus connections to the data port fail.

As a first step, please try connecting with Implicit FTPS documentation and see if you have the same result.

Also, do you get this message upon initially connecting (i.e. you are unable to connect at all) or after successfully connecting, when trying to upload?

ADD COMMENT • link written 14 months ago by Nate Coraor ♦ 3.2k

YEP! I'm on a new work computer and there was a firewall I was unaware of. I got my files uploaded, thank you Nate!

ADD REPLY • link written 14 months ago by renae.geier • 40

Similar posts • Search »