UDP port 33456: FILTERED or NOT LISTENING (no response) Or with a host that sends ICMP unreachable:
UDP port 33456: NOT LISTENING (ICMP Port Unreachable) Want to see if something on your own machine is bound to UDP but not responding? portqry udp
Here’s an interesting angle on that often surprises people: Why portqry over UDP is tricky Unlike TCP, UDP is connectionless — no handshake, no ACK. So portqry can’t just “connect” to a UDP port to see if it’s listening. UDP port 33456: FILTERED or NOT LISTENING (no