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@ -11,17 +11,17 @@ Can be choosen at random, can be hard set.
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![pic_port_header](https://i.imgur.com/TM0pOQN.png)
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# How NAT / firewall works
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# How Router's NAT works
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* By default, it **allows outgoing** communication on any port.
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* But **drops incoming** traffic unless it is a response to communication
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* **Allows outgoing** traffic on any port.
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* **Drops incoming** traffic unless it is a response to communication
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initialized from the inside.
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This is not really some security effort, the router just literally has no idea
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where to send it...
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<details>
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<summary><b>More details</b></summary>
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<summary><b>More unnecessary details</b></summary>
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NAT is implemented in your router.<br>
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It makes your **LAN side** devices able to connect with the
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