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Wiki source code of Remote Access Gateway

Version 19.18 by Xiaoling on 2022/07/14 14:22
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1 **Table of Contents:**
2
3 {{toc/}}
4
5
6
7 = **1.  Use Remote.it service** =
8
9
10 Remote.it for remote access is available in the latest Dragino firmware for gateway. For security concern, the remote.it only available base on end user demand.
11
12 (% style="color:red" %)**Important Notice:**
13
14 (% style="color:red" %)* **Remote.it access will give full control of your device to remote support.**
15 ~* **The Remote.it allow Dragino Support to remote access to the device, If user want to access himself, it need to sign up for an remote.it account.**
16
17 For how to use remoteit, please see : [[Remoteit user instruction for Dragino Gateway>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=Dragino-Remoteit_User_Manual.pdf]].
18
19
20 = **2.  RSSH Introduction** =
21
22
23 Reverse SSH for remote access is available in the latest Dragino firmware for gateway. For security concern, the RSSH only available base on end user demand.
24
25 (% style="color:red" %)**Important Notice:**
26
27 (% style="color:red" %)* **RSSH access will give full control of your device to remote support. Please remove sensitivity info before perform this**
28 ~* **This RSSH allow Dragino Support to remote access to the device, If user want to access himself, he need to set up the RSSH server himself.**
29
30 Below gateway support reverse SSH access:
31
32 * Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
33 * LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
34 * LG02, OLG02
35 * LG308, DLOS8
36 * LPS8
37 * LIG16
38 * MS14 series if installed with the same firmware.
39
40 == **2.1  For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355** ==
41
42
43 === **2.1.1  End User Guide to use SSH access** ===
44
45
46 Go to this the Reverse SSH page as below:
47
48 [[image:image-20220527102348-1.png]]
49
50 Get the RSSH configure page
51
52
53 [[image:image-20220527103251-2.png]]
54
55 Connection OK.
56
57 * (% style="color:#4f81bd" %)**Login ID**(%%):  Input (% style="color:#4f81bd" %)**sshuser**
58 * (% style="color:#4f81bd" %)**Host Address**(%%):  Input** (% style="color:#4f81bd" %)support.dragino.com(%%)**
59 * (% style="color:#4f81bd" %)**Host Port**(%%):  Please email to support @ dragino.com to get a valid host port.
60 * (% style="color:#4f81bd" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
61 * (% style="color:#4f81bd" %)**Network Keys:          **(%%)Click the Generate keys to generate the keys and download / mail it to Dragino support so Dragino can prepare the remote access to
62
63 (((
64 After doing above, please download and mail the public keys to Dragino support and wait for our mail for the valid host port. Input the valid host port got from our support and click connect so we can remote access to your gateway.
65 )))
66
67
68
69 === **2.1.2  How to Ser up a Reverse SSH access** ===
70
71
72 Advance administrator can config a SSH server to provide support their end user themselves. Instruction is as below:
73
74 1. Prepare a Linux server with public IP. The gateways need to be able to create SSH connection to this server. We recommend to use a server that performs no other function than to support the RSSH access, and to have no additional accounts active, and no access from the Internet that uses ID/password authentication.
75 1. In the gateway settings, The (% style="color:#4f81bd" %)**Login ID**(%%) will be the SSH user for this server and the (% style="color:#4f81bd" %)**Host Address**(%%) is the server address.
76 1. Ask your end user to send you the key generate in the gateway and put them in /home/<Login ID>/.ssh/authorized_key file.
77 1. Give a free port to the user and ask them to configure RSSH page in the gateway.
78 1. In your server or other machine, you will able to access to the end user device by below command:
79
80 (% class="box" %)
81 (((
82 $ ssh   -p <End User Host Port>   root@<Host Address>
83 )))
84
85 (((
86 (% style="color:red" %)**Remote RSSH Access allow the gateway to connect to SSH server as well. This will create risk to the RSSH server. Please make sure the account use for Gateway Access has the lowest access right.**
87 )))
88
89
90
91 ==== **2.1.2.1  Note for set up RSSH server** ====
92
93 If gateway reboot or the connection is incidentely close by end node. The port in SSH server will still be occupy for a long time. Administrator can use below commands to release the port.
94
95 (% class="box" %)
96 (((
97 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
98 COMMAND   PID    USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
99 sshd    21430 sshuser   15u  IPv4 47567059      0t0  TCP localhost:bacula-fd (LISTEN)
100 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430   ~-~-> Kill PID of this process.
101 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102        
102 [root@iZt4n22vqvm7ajogrfiif6Z ~~]#
103 )))
104
105
106 == **2.2  For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111** ==
107
108 Below gateway support reverse SSH access:
109
110 (% class="box" %)
111 (((
112 Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
113 LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
114 LG02, OLG02
115 LG308, DLOS8
116 LPS8
117 LIG16
118 )))
119
120
121 === **2.2.1  End User Guide to use SSH access** ===
122
123
124 ==== **2.2.1.1  Install the SSH service for server** ====
125
126
127 ===== (% style="color:blue" %)**Step 1 : Download the SSH service code**(%%) =====
128
129
130 **1).  **git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
131
132 [[image:image-20220527105447-1.png]]
133
134 git clone rssh-server
135
136
137 **2). ** cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
138
139 [[image:image-20220527105511-2.png]]
140
141 Generate the execute file
142
143
144 **Debug** :
145
146 (% class="box" %)
147 (((
148 if you git fail.  ~-~->    (% style="color:#4f81bd" %)**sudo: git: command not found.**(%%)
149 please install git.  ~-~->  (% style="color:#4f81bd" %)**yum install git -y  or  apt-get install git -y.**
150 )))
151
152 (% class="box" %)
153 (((
154 if you make error 127,it** (% style="color:#4f81bd" %)lack of gcc.(%%)**
155 please install gcc.    ~-~->(% style="color:#4f81bd" %)**yum install gcc.**
156 )))
157
158 [[image:image-20220527105856-3.png]]
159
160 lack of gcc
161
162 (% class="box" %)
163 (((
164 if you make a fatal error : sqlite3.h,it (% style="color:#4f81bd" %)**lack of sqlite3.**(%%)
165 please insatell (% style="color:#4f81bd" %)**sqlite3**.
166 )))
167
168 [[image:image-20220527105918-4.png]]
169
170 lack of sqlite3
171
172
173 (% style="color:blue" %)**How to install Sqlit3:**
174
175 (% class="box" %)
176 (((
177 (% style="color:#037691" %)**Step1:**(%%) Download the SQLit3 installation package
178 sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
179
180 (% style="color:#037691" %)**Step2:**(%%) tar the SQLit3 installation package
181 sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
182
183 (% style="color:#037691" %)**Step3:**(%%) Generate the makefile
184 cd sqlite-autoconf-3350300/;./configure
185
186 (% style="color:#037691" %)**Step4:**(%%) Compile makefile
187 sudo make
188
189 (% style="color:#037691" %)**Step5: **(%%)Install makefile
190 sudo make install
191
192 (% style="color:#037691" %)**Check:**(%%)
193 cd /usr/local/bin;ls -al  ~-~->    Check to see if there is a file for sqlite3
194 cd sqlite-autoconf-3350300/;./sqlite3 test.db        ~-~->  Test whether the sqlite3 was installed successfully
195
196 (% style="color:#037691" %)**debug:**(%%)
197 If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
198 Please execute the command /sbin/ldconfig.
199 After that execute the command ./sqlite3 test.db again.
200 )))
201
202
203
204 ===== (% style="color:blue" %)**Step 2 : Install and run the RSS service**(%%) =====
205
206
207 **1):**  intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
208
209 user must enter the root account and run the following commands
210
211 (% class="box" %)
212 (((
213 **~ $ ./create_sqlite3_db.sh
214 $ ./rssh_serv -p  3721 2>&1 &
215 $ ps -ef | grep rssh_serv check 3721 port**
216 )))
217
218 [[image:image-20220527110436-6.png]]
219
220 intall database and server development port
221
222
223 **Debug:**
224
225 (% class="box" %)
226 (((
227 **Check /var/rsshdb.sqlite3  ~-~->(% style="color:#4f81bd" %)  ls /var/rsshdb.sqlite3(%%)**
228 **Check ls /var/rsshdb.sqlite3 ~-~->**  (% style="color:#4f81bd" %)**sudo chmod 777 rssh_serv**
229 )))
230
231 (% class="box" %)
232 (((
233 if** fail to open dpvlry or to bind to it**
234 please kill rssh_serv,and run (% style="color:#4f81bd" %)** ./rssh_serv -p  3721 2>&1 &** (%%) again
235 )))
236
237
238
239 ===== (% style="color:blue" %)**Step 3 : Create a minimal SSH user (reverse SSH proxy for the gateway)**(%%) =====
240
241
242 **1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%)** (custom user name)
243
244 **2):** (% style="color:#4f81bd" %)**sudo passwd xxxxxx**
245
246 **3):** (% style="color:#4f81bd" %)**cp /bin/bash /bin/rbash**
247
248 **4):** (% style="color:#4f81bd" %)**sudo nano /etc/passwd**(%%)  ~-~-> Change /bin/bash to /bin/rbash
249
250 **5):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bashrc**(%%) **empty it,and input export PATH=$HOME/bin**
251
252 **6):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bash_profile**(%%) **empty it,and input export PATH=$HOME/bin**
253
254
255 (% style="color:red" %)**Now user "XXXXX" is the user with limited permissions of the current system**
256
257
258
259 === **2.2.2  How does user get the gateway to connect to a user's private server** ===
260
261
262 ===== (% style="color:blue" %)**Step 1 : Come bace the gateway web UI for get the gateway Public key**(%%) =====
263
264
265 **1) **in the system ~-~-> (% style="color:#4f81bd" %)**Remote Mgmt**
266
267 [[image:image-20220527110531-7.png]]
268
269 Remote Mgmt
270
271
272
273 ===== (% style="color:blue" %)**Step 2 : Authorization server**(%%) =====
274
275
276 copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
277
278 [[image:image-20220527110625-8.png]]
279
280 Publickey
281
282
283
284 ===== (% style="color:blue" %)**Step 3 : connecte private server**(%%) =====
285
286
287 in the gateway web UI
288
289 [[image:image-20220527110700-9.png]]
290
291 gateway web UI
292
293
294 (% class="box" %)
295 (((
296 (% style="color:#4f81bd" %)**Connection Type **(%%) :  If user's least privileged user with private server uses a password, select (% style="color:#4f81bd" %)**Public Key**(%%)
297 (% style="color:red" %)**Note: if user's least privileged user no uses a password,choose from both is fine**(%%)
298 (% style="color:#4f81bd" %)**Login ID**(%%) :  Input user name "eg : "XXXXX"
299 (% style="color:#4f81bd" %)**Host Address**(%%)  :  Input user's private server address
300 (% style="color:#4f81bd" %)**Connect at Startupt**(%%):  Choose to enable connect once device is powered.
301 Click Save and then Connect
302 )))
303
304
305
306 ===== (% style="color:blue" %)**Step 4 : Cheak is fine**(%%) =====
307
308
309 Rssh Host connection Ok
310
311 [[image:image-20220527111009-10.png]]
312
313 Rssh Host connection Ok
314
315
316 user can use common ps | grep ssh to check it in the gateway.
317
318 [[image:image-20220527111041-11.png]]
319
320 Check the gateway
321
322
323
324 ===== (% style="color:blue" %)**Step 5 : Create an authorization key file**(%%) =====
325
326
327 **1):**  sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
328
329 **Debug:**
330
331 (% class="box" %)
332 (((
333 **~ check: sudo ls /home/xxxxx/.ssh/authorizedkey**
334 )))
335
336
337 === **2.2.3  How to Ser up a Reverse SSH access** ===
338
339
340 ==== (% style="color:blue" %)**Step 1 : Log into the server system**(%%) ====
341
342
343 [[image:image-20220527111145-12.png]]
344
345 Loging server
346
347
348
349 ==== (% style="color:blue" %)**Step 2 : access the gateway**(%%) ====
350
351
352 (% class="box" %)
353 (((
354 **$ cd rssh-server/**
355 )))
356
357 Check the gateway linking to the server $ ./connect-gw.sh -l
358
359 [[image:image-20220527111219-13.png]]
360
361 Check the gateway linking to the server
362
363
364
365 access the gateway $ ./connect-gw.sh <GWID>
366
367 [[image:image-20220527111300-14.png]]
368
369 reverse ssh access the gateway
370
371