Wiki source code of Remote Access Gateway

Last modified by Kilight Cao on 2022/07/25 10:47
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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
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 = **2.  RSSH Introduction** =
20
21
22 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.
23
24 (% style="color:red" %)**Important Notice:**
25
26 * (% style="color:red" %)**RSSH access will give full control of your device to remote support. Please remove sensitivity info before perform this**
27 * (% 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.**
28
29 Below gateway support reverse SSH access:
30
31 * Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
32 * LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
33 * LG02, OLG02
34 * LG308, DLOS8
35 * LPS8
36 * LIG16
37 * MS14 series if installed with the same firmware.
38
39 == **2.1  For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355** ==
40
41
42 === **2.1.1  End User Guide to use SSH access** ===
43
44
45 Go to this the Reverse SSH page as below:
46
47 [[image:image-20220527102348-1.png]]
48
49 Get the RSSH configure page
50
51
52 [[image:image-20220527103251-2.png]]
53
54 Connection OK.
55
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 ==== (% style="color:blue" %)**Note for set up RSSH server**(%%) ====
92
93
94 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.
95
96 (% class="box" %)
97 (((
98 **[root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
99 COMMAND   PID    USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
100 sshd    21430 sshuser   15u  IPv4 47567059      0t0  TCP localhost:bacula-fd (LISTEN)
101 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430   ~-~-> Kill PID of this process.
102 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102        
103 [root@iZt4n22vqvm7ajogrfiif6Z ~~]#**
104 )))
105
106
107
108 == **2.2  For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111** ==
109
110
111 Below gateway support reverse SSH access:
112
113 (% class="box" %)
114 (((
115 **Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
116 LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
117 LG02, OLG02
118 LG308, DLOS8
119 LPS8
120 LIG16**
121 )))
122
123
124
125 === **2.2.1  End User Guide to use SSH access** ===
126
127
128 ==== **2.2.1.1  Install the SSH service for server** ====
129
130
131 ===== (% style="color:blue" %)**Step 1 : Download the SSH service code**(%%) =====
132
133
134 **1).  **git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
135
136 [[image:image-20220527105447-1.png]]
137
138 git clone rssh-server
139
140
141 **2). ** cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
142
143 [[image:image-20220527105511-2.png]]
144
145 Generate the execute file
146
147
148 **Debug** :
149
150 (% class="box" %)
151 (((
152 **if you git fail.  ~-~->**    (% style="color:#4f81bd" %)**sudo: git: command not found.**(%%)
153 **please install git.  ~-~->**  (% style="color:#4f81bd" %)**yum install git -y  or  apt-get install git -y.**
154 )))
155
156 (% class="box" %)
157 (((
158 **if you make error 127,it (% style="color:#4f81bd" %)lack of gcc.(%%)**
159 **please install gcc.    ~-~-> (% style="color:#4f81bd" %)yum install gcc.(%%)**
160 )))
161
162 [[image:image-20220527105856-3.png]]
163
164 lack of gcc
165
166
167 (% class="box" %)
168 (((
169 **if you make a fatal error : sqlite3.h,it** (% style="color:#4f81bd" %)**lack of sqlite3.**(%%)
170 **please insatell (% style="color:#4f81bd" %)sqlite3(%%)**(% style="color:#4f81bd" %).
171 )))
172
173 [[image:image-20220527105918-4.png]]
174
175 lack of sqlite3
176
177
178 (% style="color:blue" %)**How to install Sqlit3:**
179
180 (% class="box" %)
181 (((
182 (% style="color:#037691" %)**Step1:**(%%) Download the SQLit3 installation package
183 sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
184
185 (% style="color:#037691" %)**Step2:**(%%) tar the SQLit3 installation package
186 sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
187
188 (% style="color:#037691" %)**Step3:**(%%) Generate the makefile
189 cd sqlite-autoconf-3350300/;./configure
190
191 (% style="color:#037691" %)**Step4:**(%%) Compile makefile
192 sudo make
193
194 (% style="color:#037691" %)**Step5: **(%%)Install makefile
195 sudo make install
196
197 (% style="color:#037691" %)**Check:**(%%)
198 cd /usr/local/bin;ls -al  ~-~->    Check to see if there is a file for sqlite3
199 cd sqlite-autoconf-3350300/;./sqlite3 test.db        ~-~->  Test whether the sqlite3 was installed successfully
200
201 (% style="color:#037691" %)**debug:**(%%)
202 If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
203 Please execute the command /sbin/ldconfig.
204 After that execute the command ./sqlite3 test.db again.
205 )))
206
207
208
209 ===== (% style="color:blue" %)**Step 2 : Install and run the RSS service**(%%) =====
210
211
212 **1):**  intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
213
214 user must enter the root account and run the following commands
215
216 (% class="box" %)
217 (((
218 **~ $ ./create_sqlite3_db.sh
219 $ ./rssh_serv -p  3721 2>&1 &
220 $ ps -ef | grep rssh_serv check 3721 port**
221 )))
222
223 [[image:image-20220527110436-6.png]]
224
225 intall database and server development port
226
227
228 **Debug:**
229
230 (% class="box" %)
231 (((
232 **Check /var/rsshdb.sqlite3  ~-~->(% style="color:#4f81bd" %)  ls /var/rsshdb.sqlite3(%%)**
233 **Check ls /var/rsshdb.sqlite3 ~-~->**  (% style="color:#4f81bd" %)**sudo chmod 777 rssh_serv**
234 )))
235
236 (% class="box" %)
237 (((
238 **if fail to open dpvlry or to bind to it**
239 **please kill rssh_serv,and run (% style="color:#4f81bd" %) ./rssh_serv -p  3721 2>&1 &(%%)**(% style="color:#4f81bd" %) (%%)** again**
240 )))
241
242
243
244 ===== (% style="color:blue" %)**Step 3 : Create a minimal SSH user (reverse SSH proxy for the gateway)**(%%) =====
245
246
247 **1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%)** **(custom user name)**
248
249 **2):** (% style="color:#4f81bd" %)**sudo passwd xxxxxx**
250
251 **3):** (% style="color:#4f81bd" %)**cp /bin/bash /bin/rbash**
252
253 **4):** (% style="color:#4f81bd" %)**sudo nano /etc/passwd**(%%)  ** ~-~-> Change /bin/bash to /bin/rbash**
254
255 **5):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bashrc**(%%) **empty it,and input export PATH=$HOME/bin**
256
257 **6):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bash_profile**(%%) **empty it,and input export PATH=$HOME/bin**
258
259
260 (% style="color:red" %)**Now user "XXXXX" is the user with limited permissions of the current system**
261
262
263
264 === **2.2.2  How does user get the gateway to connect to a user's private server** ===
265
266
267 ===== (% style="color:blue" %)**Step 1 : Come bace the gateway web UI for get the gateway Public key**(%%) =====
268
269
270 **1) in the system ~-~->** (% style="color:#4f81bd" %)**Remote Mgmt**
271
272 [[image:image-20220527110531-7.png]]
273
274 Remote Mgmt
275
276
277
278 ===== (% style="color:blue" %)**Step 2 : Authorization server**(%%) =====
279
280
281 copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
282
283 [[image:image-20220527110625-8.png]]
284
285 Publickey
286
287
288
289 ===== (% style="color:blue" %)**Step 3 : connecte private server**(%%) =====
290
291
292 in the gateway web UI
293
294 [[image:image-20220527110700-9.png]]
295
296 gateway web UI
297
298
299 (% class="box" %)
300 (((
301 (% style="color:#4f81bd" %)**Connection Type **(%%) :  **If user's least privileged user with private server uses a password, select** (% style="color:#4f81bd" %)**Public Key**(%%)
302 (% style="color:red" %)**Note: if user's least privileged user no uses a password,choose from both is fine**(%%)
303 (% style="color:#4f81bd" %)**Login ID**(%%) :  ** Input user name "eg : "XXXXX"**
304 (% style="color:#4f81bd" %)**Host Address**(%%)  :  ** Input user's private server address**
305 (% style="color:#4f81bd" %)**Connect at Startupt **(%%):  ** Choose to enable connect once device is powered.**
306 **Click Save and then Connect**
307 )))
308
309
310
311 ===== (% style="color:blue" %)**Step 4 : Cheak is fine**(%%) =====
312
313
314 Rssh Host connection Ok
315
316 [[image:image-20220527111009-10.png]]
317
318 Rssh Host connection Ok
319
320
321 user can use common ps | grep ssh to check it in the gateway.
322
323 [[image:image-20220527111041-11.png]]
324
325 Check the gateway
326
327
328
329 ===== (% style="color:blue" %)**Step 5 : Create an authorization key file**(%%) =====
330
331
332 **1):**  **sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey**
333
334
335 **Debug:**
336
337 (% class="box" %)
338 (((
339 **~ check: sudo ls /home/xxxxx/.ssh/authorizedkey**
340 )))
341
342
343
344 === **2.2.3  How to Ser up a Reverse SSH access** ===
345
346
347 ==== (% style="color:blue" %)**Step 1 : Log into the server system**(%%) ====
348
349
350 [[image:image-20220527111145-12.png]]
351
352 Loging server
353
354
355
356 ==== (% style="color:blue" %)**Step 2 : access the gateway**(%%) ====
357
358
359 (% class="box" %)
360 (((
361 **$ cd rssh-server/**
362 )))
363
364 Check the gateway linking to the server $ ./connect-gw.sh -l
365
366 [[image:image-20220527111219-13.png]]
367
368 Check the gateway linking to the server
369
370
371
372 access the gateway $ ./connect-gw.sh <GWID>
373
374 [[image:image-20220527111300-14.png]]
375
376 reverse ssh access the gateway
377
378

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