Wiki source code of Remote Access Gateway

Version 21.1 by Xiaoling on 2022/07/14 15:17
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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 * (% style="color:red" %)**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
21 = **2.  RSSH Introduction** =
22
23
24 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.
25
26 (% style="color:red" %)**Important Notice:**
27
28 * (% style="color:red" %)**RSSH access will give full control of your device to remote support. Please remove sensitivity info before perform this**
29 * (% style="color:red" %)**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.**
30
31 Below gateway support reverse SSH access:
32
33 * Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
34 * LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
35 * LG02, OLG02
36 * LG308, DLOS8
37 * LPS8
38 * LIG16
39 * MS14 series if installed with the same firmware.
40
41
42 == **2.1  For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355** ==
43
44
45 === **2.1.1  End User Guide to use SSH access** ===
46
47
48 Go to this the Reverse SSH page as below:
49
50 [[image:image-20220527102348-1.png]]
51
52 Get the RSSH configure page
53
54
55 [[image:image-20220527103251-2.png]]
56
57 Connection OK.
58
59
60 * (% style="color:#4f81bd" %)**Login ID**(%%):  Input (% style="color:#4f81bd" %)**sshuser**
61 * (% style="color:#4f81bd" %)**Host Address**(%%):  Input** (% style="color:#4f81bd" %)support.dragino.com(%%)**
62 * (% style="color:#4f81bd" %)**Host Port**(%%):  Please email to support @ dragino.com to get a valid host port.
63 * (% style="color:#4f81bd" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
64 * (% 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
65
66 (((
67 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.
68 )))
69
70
71
72 === **2.1.2  How to Ser up a Reverse SSH access** ===
73
74
75 Advance administrator can config a SSH server to provide support their end user themselves. Instruction is as below:
76
77 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.
78 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.
79 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.
80 1. Give a free port to the user and ask them to configure RSSH page in the gateway.
81 1. In your server or other machine, you will able to access to the end user device by below command:
82
83 (% class="box" %)
84 (((
85 **$ ssh   -p <End User Host Port>   root@<Host Address>**
86 )))
87
88 (((
89 (% 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.**
90 )))
91
92
93
94 ==== (% style="color:blue" %)**Note for set up RSSH server**(%%) ====
95
96
97 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.
98
99 (% class="box" %)
100 (((
101 **[root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
102 COMMAND   PID    USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
103 sshd    21430 sshuser   15u  IPv4 47567059      0t0  TCP localhost:bacula-fd (LISTEN)
104 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430   ~-~-> Kill PID of this process.
105 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102        
106 [root@iZt4n22vqvm7ajogrfiif6Z ~~]#**
107 )))
108
109
110
111 == **2.2  For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111** ==
112
113
114 Below gateway support reverse SSH access:
115
116 (% class="box" %)
117 (((
118 **Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
119 LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
120 LG02, OLG02
121 LG308, DLOS8
122 LPS8
123 LIG16**
124 )))
125
126
127
128 === **2.2.1  End User Guide to use SSH access** ===
129
130
131 ==== **2.2.1.1  Install the SSH service for server** ====
132
133
134 ===== (% style="color:blue" %)**Step 1 : Download the SSH service code**(%%) =====
135
136
137 **1).  **git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
138
139 [[image:image-20220527105447-1.png]]
140
141 git clone rssh-server
142
143
144 **2). ** cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
145
146 [[image:image-20220527105511-2.png]]
147
148 Generate the execute file
149
150
151 **Debug** :
152
153 (% class="box" %)
154 (((
155 **if you git fail.  ~-~->**    (% style="color:#4f81bd" %)**sudo: git: command not found.**(%%)
156 **please install git.  ~-~->**  (% style="color:#4f81bd" %)**yum install git -y  or  apt-get install git -y.**
157 )))
158
159 (% class="box" %)
160 (((
161 **if you make error 127,it (% style="color:#4f81bd" %)lack of gcc.(%%)**
162 **please install gcc.    ~-~-> (% style="color:#4f81bd" %)yum install gcc.(%%)**
163 )))
164
165 [[image:image-20220527105856-3.png]]
166
167 lack of gcc
168
169
170 (% class="box" %)
171 (((
172 **if you make a fatal error : sqlite3.h,it** (% style="color:#4f81bd" %)**lack of sqlite3.**(%%)
173 **please insatell (% style="color:#4f81bd" %)sqlite3(%%)**(% style="color:#4f81bd" %).
174 )))
175
176 [[image:image-20220527105918-4.png]]
177
178 lack of sqlite3
179
180
181 (% style="color:blue" %)**How to install Sqlit3:**
182
183 (% class="box" %)
184 (((
185 (% style="color:#037691" %)**Step1:**(%%) Download the SQLit3 installation package
186 sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
187
188 (% style="color:#037691" %)**Step2:**(%%) tar the SQLit3 installation package
189 sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
190
191 (% style="color:#037691" %)**Step3:**(%%) Generate the makefile
192 cd sqlite-autoconf-3350300/;./configure
193
194 (% style="color:#037691" %)**Step4:**(%%) Compile makefile
195 sudo make
196
197 (% style="color:#037691" %)**Step5: **(%%)Install makefile
198 sudo make install
199
200 (% style="color:#037691" %)**Check:**(%%)
201 cd /usr/local/bin;ls -al  ~-~->    Check to see if there is a file for sqlite3
202 cd sqlite-autoconf-3350300/;./sqlite3 test.db        ~-~->  Test whether the sqlite3 was installed successfully
203
204 (% style="color:#037691" %)**debug:**(%%)
205 If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
206 Please execute the command /sbin/ldconfig.
207 After that execute the command ./sqlite3 test.db again.
208 )))
209
210
211
212 ===== (% style="color:blue" %)**Step 2 : Install and run the RSS service**(%%) =====
213
214
215 **1):**  intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
216
217 user must enter the root account and run the following commands
218
219 (% class="box" %)
220 (((
221 **~ $ ./create_sqlite3_db.sh
222 $ ./rssh_serv -p  3721 2>&1 &
223 $ ps -ef | grep rssh_serv check 3721 port**
224 )))
225
226 [[image:image-20220527110436-6.png]]
227
228 intall database and server development port
229
230
231 **Debug:**
232
233 (% class="box" %)
234 (((
235 **Check /var/rsshdb.sqlite3  ~-~->(% style="color:#4f81bd" %)  ls /var/rsshdb.sqlite3(%%)**
236 **Check ls /var/rsshdb.sqlite3 ~-~->**  (% style="color:#4f81bd" %)**sudo chmod 777 rssh_serv**
237 )))
238
239 (% class="box" %)
240 (((
241 **if fail to open dpvlry or to bind to it**
242 **please kill rssh_serv,and run (% style="color:#4f81bd" %) ./rssh_serv -p  3721 2>&1 &(%%)**(% style="color:#4f81bd" %) (%%)** again**
243 )))
244
245
246
247 ===== (% style="color:blue" %)**Step 3 : Create a minimal SSH user (reverse SSH proxy for the gateway)**(%%) =====
248
249
250 **1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%)** **(custom user name)**
251
252 **2):** (% style="color:#4f81bd" %)**sudo passwd xxxxxx**
253
254 **3):** (% style="color:#4f81bd" %)**cp /bin/bash /bin/rbash**
255
256 **4):** (% style="color:#4f81bd" %)**sudo nano /etc/passwd**(%%)  ** ~-~-> Change /bin/bash to /bin/rbash**
257
258 **5):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bashrc**(%%) **empty it,and input export PATH=$HOME/bin**
259
260 **6):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bash_profile**(%%) **empty it,and input export PATH=$HOME/bin**
261
262
263 (% style="color:red" %)**Now user "XXXXX" is the user with limited permissions of the current system**
264
265
266
267 === **2.2.2  How does user get the gateway to connect to a user's private server** ===
268
269
270 ===== (% style="color:blue" %)**Step 1 : Come bace the gateway web UI for get the gateway Public key**(%%) =====
271
272
273 **1) in the system ~-~->** (% style="color:#4f81bd" %)**Remote Mgmt**
274
275 [[image:image-20220527110531-7.png]]
276
277 Remote Mgmt
278
279
280
281 ===== (% style="color:blue" %)**Step 2 : Authorization server**(%%) =====
282
283
284 copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
285
286 [[image:image-20220527110625-8.png]]
287
288 Publickey
289
290
291
292 ===== (% style="color:blue" %)**Step 3 : connecte private server**(%%) =====
293
294
295 in the gateway web UI
296
297 [[image:image-20220527110700-9.png]]
298
299 gateway web UI
300
301
302 (% class="box" %)
303 (((
304 (% style="color:#4f81bd" %)**Connection Type **(%%) :  **If user's least privileged user with private server uses a password, select** (% style="color:#4f81bd" %)**Public Key**(%%)
305 (% style="color:red" %)**Note: if user's least privileged user no uses a password,choose from both is fine**(%%)
306 (% style="color:#4f81bd" %)**Login ID**(%%) :  ** Input user name "eg : "XXXXX"**
307 (% style="color:#4f81bd" %)**Host Address**(%%)  :  ** Input user's private server address**
308 (% style="color:#4f81bd" %)**Connect at Startupt **(%%):  ** Choose to enable connect once device is powered.**
309 **Click Save and then Connect**
310 )))
311
312
313
314 ===== (% style="color:blue" %)**Step 4 : Cheak is fine**(%%) =====
315
316
317 Rssh Host connection Ok
318
319 [[image:image-20220527111009-10.png]]
320
321 Rssh Host connection Ok
322
323
324 user can use common ps | grep ssh to check it in the gateway.
325
326 [[image:image-20220527111041-11.png]]
327
328 Check the gateway
329
330
331
332 ===== (% style="color:blue" %)**Step 5 : Create an authorization key file**(%%) =====
333
334
335 **1):**  **sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey**
336
337
338 **Debug:**
339
340 (% class="box" %)
341 (((
342 **~ check: sudo ls /home/xxxxx/.ssh/authorizedkey**
343 )))
344
345
346
347 === **2.2.3  How to Ser up a Reverse SSH access** ===
348
349
350 ==== (% style="color:blue" %)**Step 1 : Log into the server system**(%%) ====
351
352
353 [[image:image-20220527111145-12.png]]
354
355 Loging server
356
357
358
359 ==== (% style="color:blue" %)**Step 2 : access the gateway**(%%) ====
360
361
362 (% class="box" %)
363 (((
364 **$ cd rssh-server/**
365 )))
366
367 Check the gateway linking to the server $ ./connect-gw.sh -l
368
369 [[image:image-20220527111219-13.png]]
370
371 Check the gateway linking to the server
372
373
374
375 access the gateway $ ./connect-gw.sh <GWID>
376
377 [[image:image-20220527111300-14.png]]
378
379 reverse ssh access the gateway
380
381

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