4.3. FTP serversΒΆ

File Transfer Protocol (FTP) is an importent protocol for transferring files from host to host. All FTP connections are unencrypted to make it possible to sniff the control and data connections between the client and the server. The listed ftp servers are ready to include:

To run all ftp servers on one machine it’s needed that they use different ports. Table below shows the ports and the assigned ftp server.

Port Server
21 vsftpd
2021 pure-ftpd
2221 proftpd

For vsftpd TLS support is coming soon and the configuration is not really working.

$ ftp
Connected to (
220 (vsFTPd 3.0.2)
Name ( bob
331 Please specify the password.
230 Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> ls
500 OOPS: priv_sock_get_int
Passive mode refused.