20 FTP dataActive-mode FTP data transfer channel.
Open alongside 21 for active FTP. Prefer SFTP/FTPS for anything modern.
| Transport | Status | Meaning |
|---|---|---|
| TCP | Yes | Assigned by IANA and standardized, specified, or widely used on this port. |
| UDP | Assigned | Assigned by IANA, but not standardized, specified, or widely used on this port. |
| SCTP | Yes | Assigned by IANA and standardized, specified, or widely used on this port. |
| DCCP | — | Not applicable for this transport. |
Well-known (0–1023). System port for a core service. On Unix-like systems, binding it requires superuser privileges.
Browse all ports →