Port 21 FTP
File Transfer Protocol
About Port 21
FTP is a standard network protocol used for transferring files between a client and a server. Port 21 handles the control connection for FTP sessions, including authentication and command exchange.
Security Notes
FTP transmits credentials and data in plaintext, making it vulnerable to interception. Anonymous FTP access should be carefully restricted. Prefer SFTP or FTPS.
Total Hosts
28.9M
TLS Encrypted
0.0%
Vulnerable Hosts
1.7M
Countries
10+
Top Services
| ftp | 27,525,455 |
| smtp | 921,318 |
| mongodb | 295,935 |
| ftp-proxy | 53,059 |
| unknown | 35,356 |
| ssh | 34,312 |
| pwdgen | 6,127 |
| mysql | 2,597 |
| telnet | 1,817 |
| nagios-nsca | 924 |
Top Countries
 United States |
4,681,907 |
 China |
2,490,963 |
 Hong Kong |
2,272,495 |
 Germany |
2,098,111 |
 Japan |
1,164,292 |
 France |
899,606 |
 Netherlands |
899,193 |
 Russia |
763,899 |
 United Kingdom |
736,541 |
 Brazil |
625,924 |
Top Products
| Pure-FTPd | 8,786,897 |
| ProFTPD | 4,208,209 |
| vsftpd | 2,099,701 |
| Microsoft ftpd | 1,435,118 |
| MikroTik router ftpd | 1,287,311 |
| ProFTPD or KnFTPD | 928,437 |
| Bftpd | 563,192 |
| FileZilla Server | 558,599 |
| Welcome | 399,695 |
| GNU Inetutils FTPd | 340,188 |