Packet Analysis ✔ 1. DNS Query Behavior
Your machine sends UDP packets toward port 53.
✔ 2. No DNS Reply Received
Since the DNS server doesn't exist, no valid UDP reply returns.
✔ 3. ICMP Error Returned
The server (or router) responds:
Type 3 — Destination Unreachable Code 3 — Port Unreachable
This means the DNS service on that server is not running, blocked, or invalid.