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Wiki source code of Remote Access Gateway

Version 19.3 by Xiaoling on 2022/05/30 11:31
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1 **Contents:**
2
3 {{toc/}}
4
5
6
7 = **1. Use Remote.it service** =
8
9 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.
10
11 (% style="color:red" %)**Important Notice:**
12
13 (% style="color:red" %)* **Remote.it access will give full control of your device to remote support.**
14 ~* **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.**
15
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
19 = **2. RSSH Introduction** =
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 ~* **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
39
40 == **2.1 For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355** ==
41
42 === **2.1.1 End User Guide to use SSH access** ===
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 * (% style="color:#4f81bd" %)**Login ID**(%%): Input (% style="color:#4f81bd" %)**sshuser**
56 * (% style="color:#4f81bd" %)**Host Address**(%%): Input** (% style="color:#4f81bd" %)support.dragino.com(%%)**
57 * (% style="color:#4f81bd" %)**Host Port**(%%): Please email to support @ dragino.com to get a valid host port.
58 * (% style="color:#4f81bd" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
59 * (% 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
60
61 (((
62 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.
63 )))
64
65
66 === **2.1.2 How to Ser up a Reverse SSH access** ===
67
68 Advance administrator can config a SSH server to provide support their end user themselves. Instruction is as below:
69
70 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.
71 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.
72 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.
73 1. Give a free port to the user and ask them to configure RSSH page in the gateway.
74 1. In your server or other machine, you will able to access to the end user device by below command:
75
76 (% class="box" %)
77 (((
78 $ ssh   -p <End User Host Port>   root@<Host Address>
79 )))
80
81 (((
82 (% 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.**
83 )))
84
85
86 ==== **2.1.2.1 Note for set up RSSH server** ====
87
88 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.
89
90 (% class="box" %)
91 (((
92 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
93 COMMAND   PID    USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
94 sshd    21430 sshuser   15u  IPv4 47567059      0t0  TCP localhost:bacula-fd (LISTEN)
95 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430   ~-~-> Kill PID of this process.
96 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102        
97 [root@iZt4n22vqvm7ajogrfiif6Z ~~]#
98 )))
99
100
101 == **2.2 For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111** ==
102
103 Below gateway support reverse SSH access:
104
105 (% class="box" %)
106 (((
107 Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
108 LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
109 LG02, OLG02
110 LG308, DLOS8
111 LPS8
112 LIG16
113 )))
114
115
116 === **2.2.1 End User Guide to use SSH access** ===
117
118 ==== **2.2.1.1 Install the SSH service for server** ====
119
120 ===== **2.2.1.1.1 Step 1:Download the SSH service code** =====
121
122 1).git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
123
124 [[image:image-20220527105447-1.png]]
125
126 git clone rssh-server
127
128
129 2).cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
130
131 [[image:image-20220527105511-2.png]]
132
133 Generate the execute file
134
135
136 **Debug** :
137
138 (% class="box" %)
139 (((
140 if you git fail.  ~-~->    (% style="color:#4f81bd" %)**sudo: git: command not found.**(%%)
141 please install git.  ~-~->  (% style="color:#4f81bd" %)**yum install git -y  or  apt-get install git -y.**
142 )))
143
144 (% class="box" %)
145 (((
146 if you make error 127,it** (% style="color:#4f81bd" %)lack of gcc.(%%)**
147 please install gcc.    ~-~->(% style="color:#4f81bd" %)**yum install gcc.**
148 )))
149
150 [[image:image-20220527105856-3.png]]
151
152 lack of gcc
153
154 (% class="box" %)
155 (((
156 if you make a fatal error : sqlite3.h,it (% style="color:#4f81bd" %)**lack of sqlite3.**(%%)
157 please insatell (% style="color:#4f81bd" %)**sqlite3**.
158 )))
159
160 [[image:image-20220527105918-4.png]]
161
162 lack of sqlite3
163
164
165 How to install Sqlit3
166
167 (% class="box" %)
168 (((
169 Step1: Download the SQLit3 installation package
170 sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
171 Step2: tar the SQLit3 installation package
172 sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
173 Step3: Generate the makefile
174 cd sqlite-autoconf-3350300/;./configure
175 Step4: Compile makefile
176 sudo make
177 Step5: Install makefile
178 sudo make install
179 Check:
180 cd /usr/local/bin;ls -al                             ~-~->    Check to see if there is a file for sqlite3
181 cd sqlite-autoconf-3350300/;./sqlite3 test.db        ~-~->    Test whether the sqlite3 was installed successfully
182 debug:
183 If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
184 Please execute the command /sbin/ldconfig.
185 After that execute the command ./sqlite3 test.db again.
186 )))
187
188
189 ===== **2.2.1.1.2 Step 2 :Install and run the RSS service** =====
190
191 1): intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
192
193 user must enter the root account and run the following commands
194
195 (% class="box" %)
196 (((
197 $ ./create_sqlite3_db.sh
198 $ ./rssh_serv -p  3721 2>&1 &
199 $ ps -ef | grep rssh_serv check 3721 port
200 )))
201
202 [[image:image-20220527110436-6.png]]
203
204 intall database and server development port
205
206 **Debug:**
207
208 (% class="box" %)
209 (((
210 Check /var/rsshdb.sqlite3 ~-~->(% style="color:#4f81bd" %)** ls /var/rsshdb.sqlite3**(%%)
211 Check ls /var/rsshdb.sqlite3 ~-~-> (% style="color:#4f81bd" %)**sudo chmod 777 rssh_serv**
212 )))
213
214 (% class="box" %)
215 (((
216 if** fail to open dpvlry or to bind to it**
217 please kill rssh_serv,and run (% style="color:#4f81bd" %)** ./rssh_serv -p  3721 2>&1 &** (%%) again
218 )))
219
220
221 ===== **2.2.1.1.3 Step 3 :Create a minimal SSH user (reverse SSH proxy for the gateway)** =====
222
223 **1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%)** (custom user name)
224
225 **2):** (% style="color:#4f81bd" %)**sudo passwd xxxxxx**
226
227 **3):** (% style="color:#4f81bd" %)**cp /bin/bash /bin/rbash**
228
229 **4):** (% style="color:#4f81bd" %)**sudo nano /etc/passwd**(%%) ~-~-> Change /bin/bash to /bin/rbash
230
231 **5):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bashrc**(%%) **empty it,and input export PATH=$HOME/bin**
232
233 **6):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bash_profile**(%%) **empty it,and input export PATH=$HOME/bin**
234
235 **Now user "XXXXX" is the user with limited permissions of the current system**
236
237
238 === **2.2.2 How does user get the gateway to connect to a user's private server** ===
239
240 ===== **2.2.2.1 Step1: Come bace the gateway web UI for get the gateway Public key** =====
241
242 1) in the system ~-~-> (% style="color:#4f81bd" %)**Remote Mgmt/span>**
243
244 [[image:image-20220527110531-7.png]]
245
246 Remote Mgmt
247
248
249 ===== **2.2.2.2 Step2: Authorization server** =====
250
251 copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
252
253 [[image:image-20220527110625-8.png]]
254
255 Publickey
256
257
258 ===== **2.2.2.3 Step3: connecte private server** =====
259
260 in the gateway web UI
261
262 [[image:image-20220527110700-9.png]]
263
264 gateway web UI
265
266 (% class="box" %)
267 (((
268 (% style="color:#4f81bd" %)**Connection Type **(%%) : If user's least privileged user with private server uses a password, select (% style="color:#4f81bd" %)**Public Key**(%%)
269 **Note:if user's least privileged user no uses a password,choose from both is fine**
270 (% style="color:#4f81bd" %)**Login ID**(%%)             : Input user name "eg : "XXXXX"
271 (% style="color:#4f81bd" %)**Host Address**(%%)         : Input user's private server address
272 (% style="color:#4f81bd" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
273 Click Save and then Connect
274 )))
275
276
277 ===== **2.2.2.4 Step 4 :Cheak is fine** =====
278
279 Rssh Host connection Ok
280
281 [[image:image-20220527111009-10.png]]
282
283 Rssh Host connection Ok
284
285
286 user can use common ps | grep ssh to check it in the gateway.
287
288 [[image:image-20220527111041-11.png]]
289
290 Check the gateway
291
292
293 ===== **2.2.2.5 Step5:Create an authorization key file** =====
294
295 1):sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
296
297 **Debug:**
298
299 (% class="box" %)
300 (((
301 check: sudo ls /home/xxxxx/.ssh/authorizedkey
302 )))
303
304
305 === **2.2.3 How to Ser up a Reverse SSH access** ===
306
307 ==== **2.2.3.1 Step1: Log into the server system** ====
308
309 [[image:image-20220527111145-12.png]]
310
311 Loging server
312
313
314 ==== **2.2.3.2 Step2:access the gateway** ====
315
316 (% class="box" %)
317 (((
318 $ cd rssh-server/
319 )))
320
321 Check the gateway linking to the server $ ./connect-gw.sh -l
322
323 [[image:image-20220527111219-13.png]]
324
325 Check the gateway linking to the server
326
327
328 access the gateway $ ./connect-gw.sh <GWID>
329
330 [[image:image-20220527111300-14.png]]
331
332 reverse ssh access the gateway