// REFERENCE
Port 873 (rsync)
Protocol: TCP
Service: rsync
High risk
rsync in daemon mode: file synchronization. Unencrypted and often without authentication by default: an open rsync module can expose entire backups. Tunnel it over SSH.
Related tools
Work with this in:
Related
20
Port 20 (FTP-DATA) 21
Port 21 (FTP) 69
Port 69 (TFTP) 139
Port 139 (NetBIOS Session / SMB) 445
Port 445 (SMB) 989
Port 989 (FTPS data)
Port 20 (FTP-DATA) 21
Port 21 (FTP) 69
Port 69 (TFTP) 139
Port 139 (NetBIOS Session / SMB) 445
Port 445 (SMB) 989
Port 989 (FTPS data)
Assignments per the IANA port registry. Educational content.