Wiki source code of Filter unwanted LoRaWAN packets
Version 32.1 by Kilight Cao on 2022/07/26 17:52
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| author | version | line-number | content |
|---|---|---|---|
| 1 | **~ Table of Contents:** | ||
| 2 | |||
| 3 | {{toc/}} | ||
| 4 | |||
| 5 | |||
| 6 | |||
| 7 | |||
| 8 | |||
| 9 | = **1. Introduction** = | ||
| 10 | |||
| 11 | This feature is to filter the unwanted LoRaWAN packets. Purpose is to save the upstream traffic especially for a 4G cellular connection. If configured, gateway will process filter for below two types of message: | ||
| 12 | |||
| 13 | * Unconfirmed Data Up | ||
| 14 | * Confirmed Data Up | ||
| 15 | |||
| 16 | = **2. FWD Filter Mechanism** = | ||
| 17 | |||
| 18 | |||
| 19 | (% class="wikigeneratedid" id="H1.1SupportDevices" %) | ||
| 20 | **Support Devices:** | ||
| 21 | |||
| 22 | * Firmware Version > ** dragino-lgw~-~-v5.4.1658824252** | ||
| 23 | * LG308, DLOS8, LPS8, LIG16, LG308N, DLOS8N, LPS8N | ||
| 24 | |||
| 25 | **Filtering rules:** | ||
| 26 | |||
| 27 | (% border="1" style="background-color:#ffffcc; color:green; width:937.222px" %) | ||
| 28 | |=(% colspan="2" style="width: 724px;" %)Fport Filter|=(% colspan="2" style="width: 724px;" %)DevAddr Filter | ||
| 29 | |(% style="width:329px" %)**Level 0**|(% style="width:329px" %)Do nothing|(% style="width:329px" %)**Level 0**|(% style="width:329px" %)Do nothing | ||
| 30 | |(% style="width:329px" %)**Level 1**|(% style="width:329px" %)Filter only the Fport in the list|(% style="width:329px" %)**Level 1**|(% style="width:329px" %)Filter only the DevAddr in the list | ||
| 31 | |(% style="width:329px" %)**Level 2**|(% style="width:329px" %)Filter Fport that are not in the database|(% style="width:329px" %)**Level 2**|(% style="width:329px" %)Filter DevAddr that are not in the database | ||
| 32 | |||
| 33 | ((( | ||
| 34 | [[image:image-20220726171434-6.png||height="628" width="692"]] | ||
| 35 | |||
| 36 | |||
| 37 | **Check if the filter is running** | ||
| 38 | |||
| 39 | [[image:image-20220726164533-3.png||height="465" width="982"]] | ||
| 40 | |||
| 41 | |||
| 42 | == **2.1 Filter By Fport** == | ||
| 43 | |||
| 44 | |||
| 45 | The Gateway FPort filter will check all the below LoRaWAN messages: Unconfirmed Data Up & Confirmed Data Up. | ||
| 46 | |||
| 47 | |||
| 48 | (% style="color:red" %)**Important Notice:** | ||
| 49 | |||
| 50 | * By default, Fport Filter (% style="color:blue" %)**Level=0**(%%). which means do nothing | ||
| 51 | |||
| 52 | * Fport Filter configured to (% style="color:blue" %)**Level=1**(%%). If the Fport in the list matches the Fport received by the gateway, it will be dropped. | ||
| 53 | |||
| 54 | * Fport Filter configured to (% style="color:blue" %)**Level=2**(%%). If the Fport in the list does not match the Fport received by the gateway, it will be dropped. | ||
| 55 | |||
| 56 | In this case, we set Fport Filter Level=0 and add the fileter (server | fport | 0), when the gateway receives a Lorawan packet with Fport=0, it will be dropped. | ||
| 57 | |||
| 58 | [[image:image-20220726165311-4.png||height="718" width="798"]] | ||
| 59 | |||
| 60 | |||
| 61 | [[image:image-20220726170532-5.png]] | ||
| 62 | |||
| 63 | |||
| 64 | == **2.2 Filter By DevAddr** == | ||
| 65 | |||
| 66 | |||
| 67 | The Gateway FPort filter will check all the below LoRaWAN messages: Unconfirmed Data Up & Confirmed Data Up. | ||
| 68 | |||
| 69 | |||
| 70 | (% style="color:red" %)**Important Notice:** | ||
| 71 | |||
| 72 | * By default, DevAddr Filter (% style="color:blue" %)**Level=0**(%%). which means do nothing | ||
| 73 | |||
| 74 | * DevAddr Filter configured to (% style="color:blue" %)**Level=1**(%%). If the DevAddr in the list matches the DevAddr received by the gateway, it will be dropped. | ||
| 75 | |||
| 76 | * DevAddr Filter configured to (% style="color:blue" %)**Level=2**(%%). If the DevAddr in the list does not match the DevAddr received by the gateway, it will be dropped. | ||
| 77 | |||
| 78 | In this case, we set DevAddr Filter Level=0 and add the filter (server | DevAddr | 12664787 ), when the gateway receives a Lorawan packet with DevAddr=12664787, it will be dropped. | ||
| 79 | |||
| 80 | [[image:image-20220726171555-7.png||height="754" width="765"]] | ||
| 81 | |||
| 82 | |||
| 83 | [[image:image-20220726171808-8.png]] | ||
| 84 | |||
| 85 | |||
| 86 | **If user need to set the Secondary LoRaWAN Server Packet Filter, the configuration is similar to that above.** | ||
| 87 | |||
| 88 | |||
| 89 | ))) | ||
| 90 | |||
| 91 | = **3. PKT_FWD Filter Mechanism** = | ||
| 92 | |||
| 93 | |||
| 94 | (% class="wikigeneratedid" id="H1.1SupportDevices" %) | ||
| 95 | **Support Devices:** | ||
| 96 | |||
| 97 | * Firmware Version >** lgw~-~-build-v5.4.1602379434-20201011-0926** [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]] | ||
| 98 | * LG308, DLOS8 | ||
| 99 | * LPS8 | ||
| 100 | |||
| 101 | Fport & DevAddr Filter | ||
| 102 | |||
| 103 | [[image:image-20220527150138-1.png]] | ||
| 104 | |||
| 105 | |||
| 106 | Check if the filter is running | ||
| 107 | |||
| 108 | [[image:image-20220527150222-2.png||height="379" width="1062"]] | ||
| 109 | |||
| 110 | |||
| 111 | |||
| 112 | |||
| 113 | == **3.1 Filter By Fport** == | ||
| 114 | |||
| 115 | |||
| 116 | The Gateway FPort filter will check all the below LoRaWAN message: Unconfirmed Data Up & Confirmed Data Up. If the packet's FPort doesn't match the FPort setting, it will be dropped. | ||
| 117 | |||
| 118 | ((( | ||
| 119 | By default , this value is 0 means can upstream all packets with any FPort. We can set to other FPort so specify only one FPort works. | ||
| 120 | ))) | ||
| 121 | |||
| 122 | [[image:image-20220527150303-3.png]] | ||
| 123 | |||
| 124 | |||
| 125 | In case we set the FPort filter to 45, and the End Node send a packet with Fport other than 45, it will be dropped. | ||
| 126 | |||
| 127 | |||
| 128 | == **3.2 Filter By DevAddr** == | ||
| 129 | |||
| 130 | |||
| 131 | Gateway will use a DevAddr mask to check if the Unconfirmed Data Up & Confirmed Data Up packets match the mask . If not, gateway will drop it. | ||
| 132 | |||
| 133 | [[image:image-20220527150404-4.png]] | ||
| 134 | |||
| 135 | |||
| 136 | This screenshot shows packets is dropped if DevAddr mask doesn't match. | ||
| 137 | |||
| 138 | |||
| 139 | ((( | ||
| 140 | |||
| 141 | ))) |