The text "kportscan 30 upd" refers to a command or configuration used with KPortScan 3.0

: The device is actively accepting connections on this port. Closed Ports : The device is not listening on this port.

nmap -sU --host-timeout 30s <target>

: Highly effective at "hunting" for specific open ports across large IP ranges, particularly RDP (3389) , SMB, and LDAP.