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15	15
16	16	If the gateway is connected to LoRaWAN server via UDP packet fordward. We can set the server address to a UDP server to get the LoRaWAN packets.
17	17
18		-[[image:image-20220527090005-2.png]]
	18	+[[image:https://wiki.dragino.com/images/thumb/5/57/None_Encryption_1.png/600px-None_Encryption_1.png||height="259" width="600"]]
19	19
20	20	UDP Server
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22	22
23	23	We can get one of the LoRaWAN packet and analyze it. See below
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25		-[[image:image-20220527090050-3.png]]
	25	+[[image:https://wiki.dragino.com/images/thumb/b/b9/None_Encryption_2.png/600px-None_Encryption_2.png||height="497" width="600"]]
26	26
27	27	Analyze the data
28	28
29		-
30	30	(((
31		-From above screen shot, we can see most of the meaning except this** (% style="color:#4F81BD" %)"data":"QHxqASaAygwCXrumS1oFsgRq"**.(%%) This is the AES128 encryption data we mention above, it is base64 format. To decode this data, we need to have the APP Session Key and Network Session Key of this end node. If we have these two keys, we are able to decode this packet by some LoRaWAN decode website like: [[LoRaWAN Decode Website>>url:https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/]].
	30	+From above screen shot, we can see most of the meaning except this** "data":"QHxqASaAygwCXrumS1oFsgRq"**. This is the AES128 encryption data we mention above, it is base64 format. To decode this data, we need to have the APP Session Key and Network Session Key of this end node. If we have these two keys, we are able to decode this packet by some LoRaWAN decode website like: [[LoRaWAN Decode Website>>url:https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/]].
32	32	)))
33	33
34	34
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36	36	Below is an example, from
37	37	)))
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39		-[[image:image-20220527090122-4.png]]
	38	+[[image:https://wiki.dragino.com/images/thumb/4/4c/None_Encryption_3.png/600px-None_Encryption_3.png||height="388" width="600"]]
40	40
41	41	Decode the packet
42	42

image-20220527090341-5.png

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1		-XWiki.Xiaoling

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