I set up vsftpd on an Ubuntu 16.04 server. I added a user, and gave him FTP access via a userlist and chrooted him to his home directory. It worked fine. To make the file transfer more secure I wanted to add a TLS connection.
I created a new certificate with OpenSSL:
sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/ssl/private/vsftpd.pem -out /etc/ssl/private/vsftpd.pem
and adapted my vsftpd.conf
:
ssl_enable=YES
rsa_cert_file=/etc/ssl/private/vsftpd.pem
rsa_private_key_file=/etc/ssl/private/vsftpd.pem
force_local_data_ssl=YES
force_local_logins_ssl=YES
ssl_tlsv1=YES
ssl_sslv2=NO
ssl_sslv3=NO
require_ssl_reuse=NO
ssl_ciphers=HIGH
After restarting vsftpd and trying to connect via FileZilla or WinSCP I got the prompt to accept the certificate. But both programs do not actually connect me to the server. They "stop" at "retrieve-directory-listing". This is what happens when I try to log in using FileZilla:
Status: Resolving address of **
Status: Connecting to [**]:21...
Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Status: Verifying certificate...
Status: TLS connection established.
Status: Server does not support non-ASCII characters.
Status: Logged in
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is the current directory
Command: TYPE I
Response: 200 Switching to Binary mode.
Command: EPSV
Response: 229 Entering Extended Passive Mode (|||13468|)
Command: LIST
Error: Connection timed out after 20 seconds of inactivity
Error: Failed to retrieve directory listing
Status: Disconnected from server