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What TCP/UDP ports does Echo use?

Summary:

When developing and testing your Alexa skills in a corporate environment, you might need to know the TCP/UDP ports that Echo uses so that they could be opened on a corporate firewall, allowing developers to connect Echo to the network for testing. Please note that Echo is a consumer device and at the moment does not support enterprise networks directly. Therefore, you will need to create a personal/consumer Wi-Fi network to be able to use Echo within your company’s network.

Here is the list of ports you need to open:

* Output TCP: *, 80, 8080, 443, 40317, 67, 68

* Output UDP: *, 53, 123, 40317, 49317, 33434, 1900, 5000, 5353

* Input TCP: 8080, 443, 40317

* Input UDP: 53, 67, 68, 1900, 50000, 5353, 33434, 49317, 40317

alexa skills kittestingdevices
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Is there a command from the terminal that can tests if these ports are open (Outgoing and incoming)?

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What about TCP 55443?

I'm seeing all my Echo Dots trying to communicate with a private IP address on a non-existent subnet on my LAN. I have no 10. subnets on my LAN.

flows src=192.168.107.8 dst=10.250.211.185 mac=68:37:E9:9A:F6:11 protocol=tcp sport=44122 dport=55443 pattern: deny all

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Since I am the homeowner, and am unambiguously responsible for the security of my home and my connectivity, I need to be a little more aware of the wonderous things that my devices are doing, and how they interconnect. Should I use a guest wifi network for my devices? The principle of "least privilege" says I should. Should I be aware of the security measures that ensure privacy? Yes, to the degree that I need. How do I see my Thermostat, my Doorbell, garage door opener and "smart" devices (dot/echo etc) communicating? How do I remain sentient? This is not a case of Skynet deciding humans were too much trouble, right???

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