Wiki source code of Remote Access Gateway

Version 24.1 by Kilight Cao on 2022/07/25 10:41
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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 concerns, 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 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]].
17
18 = **2.  RSSH Introduction** =
19
20
21 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.
22
23 (% style="color:red" %)**Important Notice:**
24
25 * (% style="color:red" %)**RSSH access will give full control of your device to remote support. Please remove sensitivity info before perform this**
26 * (% 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.**
27
28 Below gateway support reverse SSH access:
29
30 * Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
31 * LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
32 * LG02, OLG02
33 * LG308, DLOS8
34 * LPS8
35 * LIG16
36 * MS14 series if installed with the same firmware.
37
38 == **2.1  For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355** ==
39
40
41 === **2.1.1  End User Guide to use SSH access** ===
42
43
44 Go to this the Reverse SSH page as below:
45
46 [[image:image-20220527102348-1.png]]
47
48 Get the RSSH configure page
49
50
51 [[image:image-20220527103251-2.png]]
52
53 Connection OK.
54
55
56 * (% style="color:#4f81bd" %)**Login ID**(%%):  Input (% style="color:#4f81bd" %)**sshuser**
57 * (% style="color:#4f81bd" %)**Host Address**(%%):  Input** (% style="color:#4f81bd" %)support.dragino.com(%%)**
58 * (% style="color:#4f81bd" %)**Host Port**(%%):  Please email to support @ dragino.com to get a valid host port.
59 * (% style="color:#4f81bd" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
60 * (% 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
61
62 (((
63 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.
64 )))
65
66
67
68 === **2.1.2  How to Ser up a Reverse SSH access** ===
69
70
71 Advance administrator can config a SSH server to provide support their end user themselves. Instruction is as below:
72
73 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.
74 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.
75 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.
76 1. Give a free port to the user and ask them to configure RSSH page in the gateway.
77 1. In your server or other machine, you will able to access to the end user device by below command:
78
79 (% class="box" %)
80 (((
81 **$ ssh   -p <End User Host Port>   root@<Host Address>**
82 )))
83
84 (((
85 (% 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.**
86 )))
87
88
89
90 ==== (% style="color:blue" %)**Note for set up RSSH server**(%%) ====
91
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
107 == **2.2  For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111** ==
108
109
110 Below gateway support reverse SSH access:
111
112 (% class="box" %)
113 (((
114 **Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
115 LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
116 LG02, OLG02
117 LG308, DLOS8
118 LPS8
119 LIG16**
120 )))
121
122
123
124 === **2.2.1  End User Guide to use SSH access** ===
125
126
127 ==== **2.2.1.1  Install the SSH service for server** ====
128
129
130 ===== (% style="color:blue" %)**Step 1 : Download the SSH service code**(%%) =====
131
132
133 **1).  **git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
134
135 [[image:image-20220527105447-1.png]]
136
137 git clone rssh-server
138
139
140 **2). ** cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
141
142 [[image:image-20220527105511-2.png]]
143
144 Generate the execute file
145
146
147 **Debug** :
148
149 (% class="box" %)
150 (((
151 **if you git fail.  ~-~->**    (% style="color:#4f81bd" %)**sudo: git: command not found.**(%%)
152 **please install git.  ~-~->**  (% style="color:#4f81bd" %)**yum install git -y  or  apt-get install git -y.**
153 )))
154
155 (% class="box" %)
156 (((
157 **if you make error 127,it (% style="color:#4f81bd" %)lack of gcc.(%%)**
158 **please install gcc.    ~-~-> (% style="color:#4f81bd" %)yum install gcc.(%%)**
159 )))
160
161 [[image:image-20220527105856-3.png]]
162
163 lack of gcc
164
165
166 (% class="box" %)
167 (((
168 **if you make a fatal error : sqlite3.h,it** (% style="color:#4f81bd" %)**lack of sqlite3.**(%%)
169 **please insatell (% style="color:#4f81bd" %)sqlite3(%%)**(% style="color:#4f81bd" %).
170 )))
171
172 [[image:image-20220527105918-4.png]]
173
174 lack of sqlite3
175
176
177 (% style="color:blue" %)**How to install Sqlit3:**
178
179 (% class="box" %)
180 (((
181 (% style="color:#037691" %)**Step1:**(%%) Download the SQLit3 installation package
182 sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
183
184 (% style="color:#037691" %)**Step2:**(%%) tar the SQLit3 installation package
185 sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
186
187 (% style="color:#037691" %)**Step3:**(%%) Generate the makefile
188 cd sqlite-autoconf-3350300/;./configure
189
190 (% style="color:#037691" %)**Step4:**(%%) Compile makefile
191 sudo make
192
193 (% style="color:#037691" %)**Step5: **(%%)Install makefile
194 sudo make install
195
196 (% style="color:#037691" %)**Check:**(%%)
197 cd /usr/local/bin;ls -al  ~-~->    Check to see if there is a file for sqlite3
198 cd sqlite-autoconf-3350300/;./sqlite3 test.db        ~-~->  Test whether the sqlite3 was installed successfully
199
200 (% style="color:#037691" %)**debug:**(%%)
201 If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
202 Please execute the command /sbin/ldconfig.
203 After that execute the command ./sqlite3 test.db again.
204 )))
205
206
207
208 ===== (% style="color:blue" %)**Step 2 : Install and run the RSS service**(%%) =====
209
210
211 **1):**  intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
212
213 user must enter the root account and run the following commands
214
215 (% class="box" %)
216 (((
217 **~ $ ./create_sqlite3_db.sh
218 $ ./rssh_serv -p  3721 2>&1 &
219 $ ps -ef | grep rssh_serv check 3721 port**
220 )))
221
222 [[image:image-20220527110436-6.png]]
223
224 intall database and server development port
225
226
227 **Debug:**
228
229 (% class="box" %)
230 (((
231 **Check /var/rsshdb.sqlite3  ~-~->(% style="color:#4f81bd" %)  ls /var/rsshdb.sqlite3(%%)**
232 **Check ls /var/rsshdb.sqlite3 ~-~->**  (% style="color:#4f81bd" %)**sudo chmod 777 rssh_serv**
233 )))
234
235 (% class="box" %)
236 (((
237 **if fail to open dpvlry or to bind to it**
238 **please kill rssh_serv,and run (% style="color:#4f81bd" %) ./rssh_serv -p  3721 2>&1 &(%%)**(% style="color:#4f81bd" %) (%%)** again**
239 )))
240
241
242
243 ===== (% style="color:blue" %)**Step 3 : Create a minimal SSH user (reverse SSH proxy for the gateway)**(%%) =====
244
245
246 **1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%)** **(custom user name)**
247
248 **2):** (% style="color:#4f81bd" %)**sudo passwd xxxxxx**
249
250 **3):** (% style="color:#4f81bd" %)**cp /bin/bash /bin/rbash**
251
252 **4):** (% style="color:#4f81bd" %)**sudo nano /etc/passwd**(%%)  ** ~-~-> Change /bin/bash to /bin/rbash**
253
254 **5):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bashrc**(%%) **empty it,and input export PATH=$HOME/bin**
255
256 **6):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bash_profile**(%%) **empty it,and input export PATH=$HOME/bin**
257
258
259 (% style="color:red" %)**Now user "XXXXX" is the user with limited permissions of the current system**
260
261
262
263 === **2.2.2  How does user get the gateway to connect to a user's private server** ===
264
265
266 ===== (% style="color:blue" %)**Step 1 : Come bace the gateway web UI for get the gateway Public key**(%%) =====
267
268
269 **1) in the system ~-~->** (% style="color:#4f81bd" %)**Remote Mgmt**
270
271 [[image:image-20220527110531-7.png]]
272
273 Remote Mgmt
274
275
276
277 ===== (% style="color:blue" %)**Step 2 : Authorization server**(%%) =====
278
279
280 copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
281
282 [[image:image-20220527110625-8.png]]
283
284 Publickey
285
286
287
288 ===== (% style="color:blue" %)**Step 3 : connecte private server**(%%) =====
289
290
291 in the gateway web UI
292
293 [[image:image-20220527110700-9.png]]
294
295 gateway web UI
296
297
298 (% class="box" %)
299 (((
300 (% style="color:#4f81bd" %)**Connection Type **(%%) :  **If user's least privileged user with private server uses a password, select** (% style="color:#4f81bd" %)**Public Key**(%%)
301 (% style="color:red" %)**Note: if user's least privileged user no uses a password,choose from both is fine**(%%)
302 (% style="color:#4f81bd" %)**Login ID**(%%) :  ** Input user name "eg : "XXXXX"**
303 (% style="color:#4f81bd" %)**Host Address**(%%)  :  ** Input user's private server address**
304 (% style="color:#4f81bd" %)**Connect at Startupt **(%%):  ** Choose to enable connect once device is powered.**
305 **Click Save and then Connect**
306 )))
307
308
309
310 ===== (% style="color:blue" %)**Step 4 : Cheak is fine**(%%) =====
311
312
313 Rssh Host connection Ok
314
315 [[image:image-20220527111009-10.png]]
316
317 Rssh Host connection Ok
318
319
320 user can use common ps | grep ssh to check it in the gateway.
321
322 [[image:image-20220527111041-11.png]]
323
324 Check the gateway
325
326
327
328 ===== (% style="color:blue" %)**Step 5 : Create an authorization key file**(%%) =====
329
330
331 **1):**  **sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey**
332
333
334 **Debug:**
335
336 (% class="box" %)
337 (((
338 **~ check: sudo ls /home/xxxxx/.ssh/authorizedkey**
339 )))
340
341
342
343 === **2.2.3  How to Ser up a Reverse SSH access** ===
344
345
346 ==== (% style="color:blue" %)**Step 1 : Log into the server system**(%%) ====
347
348
349 [[image:image-20220527111145-12.png]]
350
351 Loging server
352
353
354
355 ==== (% style="color:blue" %)**Step 2 : access the gateway**(%%) ====
356
357
358 (% class="box" %)
359 (((
360 **$ cd rssh-server/**
361 )))
362
363 Check the gateway linking to the server $ ./connect-gw.sh -l
364
365 [[image:image-20220527111219-13.png]]
366
367 Check the gateway linking to the server
368
369
370
371 access the gateway $ ./connect-gw.sh <GWID>
372
373 [[image:image-20220527111300-14.png]]
374
375 reverse ssh access the gateway
376
377

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