fix: Correct firewall troubleshooting note

- Port 8120 inbound only needed if Core initiates connection
- Default outbound connection requires no inbound ports
- Clarified firewall requirements in troubleshooting section

komodo-periphery-install.sh

@@ -286,7 +286,9 @@ show_status() {
     echo "  Troubleshooting:"
     echo "  - Ensure the Core Domain is reachable from this server"
     echo "  - Verify the Passkey matches the Core configuration"
-    echo "  - Check firewall rules (Port 8120 must be open)"
+    echo "  - Check firewall rules:"
+    echo "    * Outbound connection (default): No inbound ports needed"
+    echo "    * Inbound connection (if Core initiates): Open Port 8120/tcp"
     echo "  - View logs: docker logs komodo-periphery -f"
     echo ""
 }