Article ID: 124779, created on Mar 9, 2015, last review on Mar 9, 2015

  • Applies to:
  • Plesk 12.0 for Linux
  • Plesk 11.5 for Linux


The follwoing error in FTP client appears when accessing with Implicit over FTPS:

Status: Resolving address of server.hostname
Status: Connecting to
Status: Connection attempt failed with "ECONNREFUSED - Connection refused by server". 


FTPS does not listen on port 990 permanently as secure connection initiates via port 21 first. After establishing the connection to port 21 to secure an FTP session, a client application sends the command AUTH SSL according to RFC 2228. Then port 990 is opened and secure connection is established.


Set the FTP client to use "Require explicit FTP over TLS" and standard FTP protocol on port 21 for connection.

Then check FTPS connection with following steps:

  1. Initiate FTP session on the server

    # openssl s_client -connect -starttls ftp
  2. Connect using secure tunnel:

    # lftp
    lftp :~> set ftp:ssl-force true
    lftp :~> connect
    lftp> login <username>   
  3. Connect via Filezilla:


Refer to establish Explicit FTPS:

Search Words

Connection refused by server

on a non object

FTPS not working


ECONNREFUSED - Connection refused by server


FTPS 990 connection

a914db3fdc7a53ddcfd1b2db8f5a1b9c 56797cefb1efc9130f7c48a7d1db0f0c 01bc4c8cf5b7f01f815a7ada004154a2 29d1e90fd304f01e6420fbe60f66f838 0a53c5a9ca65a74d37ef5c5eaeb55d7f 2a5151f57629129e26ff206d171fbb5f e335d9adf7edffca6a8af8039031a4c7

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