Wiki source code of Remote Access Gateway

Version 18.5 by Xiaoling on 2022/05/27 11:15
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1 **Contents:**
2
3 {{toc/}}
4
5
6 = **1. Use Remote.it service** =
7
8 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.
9
10 (% style="color:red" %)**Important Notice:**
11
12 (% style="color:red" %)* **Remote.it access will give full control of your device to remote support.**
13 ~* **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.**
14
15 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]].
16
17
18 = **2. RSSH Introduction** =
19
20 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.
21
22 (% style="color:red" %)**Important Notice:**
23
24 (% style="color:red" %)* **RSSH access will give full control of your device to remote support. Please remove sensitivity info before perform this**
25 ~* **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.**
26
27 Below gateway support reverse SSH access:
28
29 * Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
30 * LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
31 * LG02, OLG02
32 * LG308, DLOS8
33 * LPS8
34 * LIG16
35 * MS14 series if installed with the same firmware.
36
37
38 == **2.1 For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355** ==
39
40 === **2.1.1 End User Guide to use SSH access** ===
41
42 Go to this the Reverse SSH page as below:
43
44 [[image:image-20220527102348-1.png]]
45
46 Get the RSSH configure page
47
48
49 [[image:image-20220527103251-2.png]]
50
51 Connection OK.
52
53 * (% style="color:#4f81bd" %)**Login ID**(%%): Input (% style="color:#4f81bd" %)**sshuser**
54 * (% style="color:#4f81bd" %)**Host Address**(%%): Input** (% style="color:#4f81bd" %)support.dragino.com(%%)**
55 * (% style="color:#4f81bd" %)**Host Port**(%%): Please email to support @ dragino.com to get a valid host port.
56 * (% style="color:#4f81bd" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
57 * (% 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
58
59 (((
60 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.
61 )))
62
63
64 === **2.1.2 How to Ser up a Reverse SSH access** ===
65
66 Advance administrator can config a SSH server to provide support their end user themselves. Instruction is as below:
67
68 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.
69 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.
70 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.
71 1. Give a free port to the user and ask them to configure RSSH page in the gateway.
72 1. In your server or other machine, you will able to access to the end user device by below command:
73
74 (% class="box" %)
75 (((
76 $ ssh   -p <End User Host Port>   root@<Host Address>
77 )))
78
79 (((
80 (% 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.**
81 )))
82
83
84 ==== **2.1.2.1 Note for set up RSSH server** ====
85
86 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.
87
88 (% class="box" %)
89 (((
90 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
91 COMMAND   PID    USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
92 sshd    21430 sshuser   15u  IPv4 47567059      0t0  TCP localhost:bacula-fd (LISTEN)
93 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430   ~-~-> Kill PID of this process.
94 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102        
95 [root@iZt4n22vqvm7ajogrfiif6Z ~~]#
96 )))
97
98
99 == **2.2 For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111** ==
100
101 Below gateway support reverse SSH access:
102
103 (% class="box" %)
104 (((
105 Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
106 LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
107 LG02, OLG02
108 LG308, DLOS8
109 LPS8
110 LIG16
111 )))
112
113
114 === **2.2.1 End User Guide to use SSH access** ===
115
116 ==== **2.2.1.1 Install the SSH service for server** ====
117
118 ===== **2.2.1.1.1 Step 1:Download the SSH service code** =====
119
120 1).git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
121
122 [[image:image-20220527105447-1.png]]
123
124 git clone rssh-server
125
126
127 2).cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
128
129 [[image:image-20220527105511-2.png]]
130
131 Generate the execute file
132
133
134 **Debug** :
135
136 (% class="box" %)
137 (((
138 if you git fail.  ~-~->    (% style="color:#4f81bd" %)**sudo: git: command not found.**(%%)
139 please install git.  ~-~->  (% style="color:#4f81bd" %)**yum install git -y  or  apt-get install git -y.**
140 )))
141
142 (% class="box" %)
143 (((
144 if you make error 127,it** (% style="color:#4f81bd" %)lack of gcc.(%%)**
145 please install gcc.    ~-~->(% style="color:#4f81bd" %)**yum install gcc.**
146 )))
147
148 [[image:image-20220527105856-3.png]]
149
150 lack of gcc
151
152 (% class="box" %)
153 (((
154 if you make a fatal error : sqlite3.h,it (% style="color:#4f81bd" %)**lack of sqlite3.**(%%)
155 please insatell (% style="color:#4f81bd" %)**sqlite3**.
156 )))
157
158 [[image:image-20220527105918-4.png]]
159
160 lack of sqlite3
161
162
163 How to install Sqlit3
164
165 (% class="box" %)
166 (((
167 Step1: Download the SQLit3 installation package
168 sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
169 Step2: tar the SQLit3 installation package
170 sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
171 Step3: Generate the makefile
172 cd sqlite-autoconf-3350300/;./configure
173 Step4: Compile makefile
174 sudo make
175 Step5: Install makefile
176 sudo make install
177 Check:
178 cd /usr/local/bin;ls -al                             ~-~->    Check to see if there is a file for sqlite3
179 cd sqlite-autoconf-3350300/;./sqlite3 test.db        ~-~->    Test whether the sqlite3 was installed successfully
180 debug:
181 If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
182 Please execute the command /sbin/ldconfig.
183 After that execute the command ./sqlite3 test.db again.
184 )))
185
186
187 ===== **2.2.1.1.2 Step 2 :Install and run the RSS service** =====
188
189 1): intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
190
191 user must enter the root account and run the following commands
192
193 (% class="box" %)
194 (((
195 $ ./create_sqlite3_db.sh
196 $ ./rssh_serv -p  3721 2>&1 &
197 $ ps -ef | grep rssh_serv check 3721 port
198 )))
199
200 [[image:image-20220527110436-6.png]]
201
202 intall database and server development port
203
204 **Debug:**
205
206 (% class="box" %)
207 (((
208 Check /var/rsshdb.sqlite3 ~-~->(% style="color:#4f81bd" %)** ls /var/rsshdb.sqlite3**(%%)
209 Check ls /var/rsshdb.sqlite3 ~-~-> (% style="color:#4f81bd" %)**sudo chmod 777 rssh_serv**
210 )))
211
212 (% class="box" %)
213 (((
214 if** fail to open dpvlry or to bind to it**
215 please kill rssh_serv,and run (% style="color:#4f81bd" %)** ./rssh_serv -p  3721 2>&1 &** (%%) again
216 )))
217
218
219 ===== **2.2.1.1.3 Step 3 :Create a minimal SSH user (reverse SSH proxy for the gateway)** =====
220
221 **1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%)** (custom user name)
222
223 **2):** (% style="color:#4f81bd" %)**sudo passwd xxxxxx**
224
225 **3):** (% style="color:#4f81bd" %)**cp /bin/bash /bin/rbash**
226
227 **4):** (% style="color:#4f81bd" %)**sudo nano /etc/passwd**(%%) ~-~-> Change /bin/bash to /bin/rbash
228
229 **5):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bashrc**(%%) **empty it,and input export PATH=$HOME/bin**
230
231 **6):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bash_profile**(%%) **empty it,and input export PATH=$HOME/bin**
232
233 **Now user "XXXXX" is the user with limited permissions of the current system**
234
235
236 === **2.2.2 How does user get the gateway to connect to a user's private server** ===
237
238 ===== **2.2.2.1 Step1: Come bace the gateway web UI for get the gateway Public key** =====
239
240 1) in the system ~-~-> (% style="color:#4f81bd" %)**Remote Mgmt/span>**
241
242 [[image:image-20220527110531-7.png]]
243
244 Remote Mgmt
245
246
247 ===== **2.2.2.2 Step2: Authorization server** =====
248
249 copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
250
251 [[image:image-20220527110625-8.png]]
252
253 Publickey
254
255
256 ===== **2.2.2.3 Step3: connecte private server** =====
257
258 in the gateway web UI
259
260 [[image:image-20220527110700-9.png]]
261
262 gateway web UI
263
264 (% class="box" %)
265 (((
266 (% style="color:#4f81bd" %)**Connection Type **(%%) : If user's least privileged user with private server uses a password, select (% style="color:#4f81bd" %)**Public Key**(%%)
267 **Note:if user's least privileged user no uses a password,choose from both is fine**
268 (% style="color:#4f81bd" %)**Login ID**(%%)             : Input user name "eg : "XXXXX"
269 (% style="color:#4f81bd" %)**Host Address**(%%)         : Input user's private server address
270 (% style="color:#4f81bd" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
271 Click Save and then Connect
272 )))
273
274
275 ===== **2.2.2.4 Step 4 :Cheak is fine** =====
276
277 Rssh Host connection Ok
278
279 [[image:image-20220527111009-10.png]]
280
281 Rssh Host connection Ok
282
283
284 user can use common ps | grep ssh to check it in the gateway.
285
286 [[image:image-20220527111041-11.png]]
287
288 Check the gateway
289
290
291 ===== **2.2.2.5 Step5:Create an authorization key file** =====
292
293 1):sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
294
295 **Debug:**
296
297 (% class="box" %)
298 (((
299 check: sudo ls /home/xxxxx/.ssh/authorizedkey
300 )))
301
302
303 === **2.2.3 How to Ser up a Reverse SSH access** ===
304
305 ==== **2.2.3.1 Step1: Log into the server system** ====
306
307 [[image:image-20220527111145-12.png]]
308
309 Loging server
310
311
312 ==== **2.2.3.2 Step2:access the gateway** ====
313
314 (% class="box" %)
315 (((
316 $ cd rssh-server/
317 )))
318
319 Check the gateway linking to the server $ ./connect-gw.sh -l
320
321 [[image:image-20220527111219-13.png]]
322
323 Check the gateway linking to the server
324
325
326 access the gateway $ ./connect-gw.sh <GWID>
327
328 [[image:image-20220527111300-14.png]]
329
330 reverse ssh access the gateway

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