Wiki source code of Remote Access Gateway

Version 4.5 by Xiaoling on 2022/05/27 10:54
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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 == 2.1 For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355 ==
38
39 === 2.1.1 End User Guide to use SSH access ===
40
41 Go to this the Reverse SSH page as below:
42
43 [[image:image-20220527102348-1.png]]
44
45 Get the RSSH configure page
46
47
48 [[image:image-20220527103251-2.png]]
49
50 Connection OK.
51
52 * (% style="color:#4f81bd" %)**Login ID**(%%): Input (% style="color:#4f81bd" %)**sshuser**
53 * (% style="color:#4f81bd" %)**Host Address**(%%): Input** (% style="color:#4f81bd" %)support.dragino.com(%%)**
54 * (% style="color:#4f81bd" %)**Host Port**(%%): Please email to support @ dragino.com to get a valid host port.
55 * (% style="color:#4f81bd" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
56 * (% 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
57
58 (((
59 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.
60 )))
61
62
63 === 2.1.2 How to Ser up a Reverse SSH access ===
64
65 Advance administrator can config a SSH server to provide support their end user themselves. Instruction is as below:
66
67 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.
68 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.
69 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.
70 1. Give a free port to the user and ask them to configure RSSH page in the gateway.
71 1. In your server or other machine, you will able to access to the end user device by below command:
72
73 (% class="box" %)
74 (((
75 $ ssh   -p <End User Host Port>   root@<Host Address>
76 )))
77
78 (((
79 (% 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.**
80 )))
81
82
83 ==== 2.1.2.1 Note for set up RSSH server ====
84
85 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.
86
87 (% class="box" %)
88 (((
89 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
90 COMMAND   PID    USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
91 sshd    21430 sshuser   15u  IPv4 47567059      0t0  TCP localhost:bacula-fd (LISTEN)
92 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430   ~-~-> Kill PID of this process.
93 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102        
94 [root@iZt4n22vqvm7ajogrfiif6Z ~~]#
95 )))
96
97
98 == 2.2 For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111 ==
99
100 Below gateway support reverse SSH access:
101
102 (% class="box" %)
103 (((
104 Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
105 LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
106 LG02, OLG02
107 LG308, DLOS8
108 LPS8
109 LIG16
110 )))
111
112
113 === 2.2.1 End User Guide to use SSH access ===
114
115 ==== 2.2.1.1 Install the SSH service for server ====
116
117 ===== 2.2.1.1.1 Step 1:Download the SSH service code =====
118
119 1).git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
120
121 [[image:https://wiki.dragino.com/images/thumb/d/d0/Git_clone.png/500px-Git_clone.png||height="80" width="500"]]
122
123 git clone rssh-server
124
125
126 2).cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
127
128 [[image:https://wiki.dragino.com/images/thumb/e/e3/Generate_the_execute_file.png/500px-Generate_the_execute_file.png||height="103" width="500"]]
129
130 Generate the execute file
131
132 **Debug** :
133
134 (% class="box" %)
135 (((
136 if you git fail.  ~-~->    (% class="mark" %)**sudo: git: command not found.**(%%)
137 please install git.  ~-~->    (% class="mark" %)**yum install git -y  or  apt-get install git -y. **
138 )))
139
140 (% class="box" %)
141 (((
142 if you make error 127,it** (% class="mark" %)lack of gcc.(%%)**
143 please install gcc.    ~-~->(% class="mark" %)**yum install gcc.**
144 )))
145
146 [[image:https://wiki.dragino.com/images/d/d7/Lack_of_gcc.png||height="174" width="434"]]
147
148 lack of gcc
149
150 (% class="box" %)
151 (((
152 if you make a fatal error : sqlite3.h,it (% class="mark" %)**lack of sqlite3.**(%%)
153 please insatell **sqlite3**.
154 )))
155
156 [[image:https://wiki.dragino.com/images/thumb/9/93/Lack_of_sqlite3.png/500px-Lack_of_sqlite3.png||height="137" width="500"]]
157
158 lack of sqlite3
159
160 How to install Sqlit3
161
162 (% class="box" %)
163 (((
164 Step1: Download the SQLit3 installation package
165 sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
166 Step2: tar the SQLit3 installation package
167 sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
168 Step3: Generate the makefile
169 cd sqlite-autoconf-3350300/;./configure
170 Step4: Compile makefile
171 sudo make
172 Step5: Install makefile
173 sudo make install
174 Check:
175 cd /usr/local/bin;ls -al                             ~-~->    Check to see if there is a file for sqlite3
176 cd sqlite-autoconf-3350300/;./sqlite3 test.db        ~-~->    Test whether the sqlite3 was installed successfully
177 debug:
178 If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
179 Please execute the command /sbin/ldconfig.
180 After that execute the command ./sqlite3 test.db again.
181 )))
182
183
184 ===== 2.2.1.1.2 Step 2 :Install and run the RSS service =====
185
186 1):intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
187
188 user must enter the root account and run the following commands
189
190 (% class="box" %)
191 (((
192 $ ./create_sqlite3_db.sh
193 $ ./rssh_serv -p  3721 2>&1 &
194 $ ps -ef | grep rssh_serv check 3721 port
195 )))
196
197 [[image:https://wiki.dragino.com/images/thumb/c/cb/Intall_database_and_server_development_port.png/500px-Intall_database_and_server_development_port.png||height="70" width="500"]]
198
199 intall database and server development port
200
201 **Debug:**
202
203 (% class="box" %)
204 (((
205 Check /var/rsshdb.sqlite3 ~-~->(% class="mark" %)** ls /var/rsshdb.sqlite3**(%%)
206 Check ls /var/rsshdb.sqlite3 ~-~-> (% class="mark" %)**sudo chmod 777 rssh_serv**
207 )))
208
209 (% class="box" %)
210 (((
211 if** fail to open dpvlry or to bind to it**
212 please kill rssh_serv,and run (% class="mark" %)** ./rssh_serv -p  3721 2>&1 &** (%%) again
213 )))
214
215
216 ===== 2.2.1.1.3 Step 3 :Create a minimal SSH user (reverse SSH proxy for the gateway) =====
217
218 1):(% class="mark" %)**sudo useradd XXXXX**(%%) (custom user name)
219
220 2):(% class="mark" %)**sudo passwd xxxxxx**
221
222 3):(% class="mark" %)**cp /bin/bash /bin/rbash**
223
224 4):(% class="mark" %)**sudo nano /etc/passwd**(%%) ~-~-> Change /bin/bash to /bin/rbash
225
226 5):(% class="mark" %)**sudo nano /home/xxxxx/.bashrc**(%%) **empty it,and input export PATH=$HOME/bin**
227
228 6):(% class="mark" %)**sudo nano /home/xxxxx/.bash_profile**(%%) **empty it,and input export PATH=$HOME/bin**
229
230 **Now user "XXXXX" is the user with limited permissions of the current system**
231
232
233 === 2.2.2 How does user get the gateway to connect to a user's private server ===
234
235 ===== 2.2.2.1 Step1: Come bace the gateway web UI for get the gateway Public key =====
236
237 1)in the system ~-~-> (% class="mark" %)**Remote Mgmt/span>**
238
239 [[image:https://wiki.dragino.com/images/thumb/8/8f/Remote_Mgmt.png/500px-Remote_Mgmt.png||height="367" width="500"]]
240
241 Remote Mgmt
242
243
244 ===== 2.2.2.2 Step2: Authorization server =====
245
246 copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
247
248 [[image:https://wiki.dragino.com/images/thumb/4/49/Publickey.png/500px-Publickey.png||height="81" width="500"]]
249
250 Publickey
251
252
253 ===== 2.2.2.3 Step3: connecte private server =====
254
255 in the gateway web UI
256
257 [[image:https://wiki.dragino.com/images/thumb/0/04/Gateway_web_UI.png/500px-Gateway_web_UI.png||height="389" width="500"]]
258
259 gateway web UI
260
261 (% class="box" %)
262 (((
263 (% class="mark" %)**Connection Type **(%%) : If user's least privileged user with private server uses a password, select (% class="mark" %)**Public Key**(%%)
264 **Note:if user's least privileged user no uses a password,choose from both is fine**
265 (% class="mark" %)**Login ID**(%%)             : Input user name "eg : "XXXXX"
266 (% class="mark" %)**Host Address**(%%)         : Input user's private server address
267 (% class="mark" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
268 Click Save and then Connect
269 )))
270
271
272 ===== 2.2.2.4 Step 4 :Cheak is fine =====
273
274 Rssh Host connection Ok
275
276 [[image:https://wiki.dragino.com/images/thumb/6/6f/Rssh_Host_connection_Ok.png/500px-Rssh_Host_connection_Ok.png||height="225" width="500"]]
277
278 Rssh Host connection Ok
279
280
281 user can use common ps | grep ssh to check it in the gateway.
282
283 [[image:https://wiki.dragino.com/images/thumb/a/ad/Check_the_gateway.png/500px-Check_the_gateway.png]]
284
285 Check the gateway
286
287
288 ===== 2.2.2.5 Step5:Create an authorization key file =====
289
290 1):sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
291
292 **Debug:**
293
294 (% class="box" %)
295 (((
296 check: sudo ls /home/xxxxx/.ssh/authorizedkey
297 )))
298
299 === 2.2.3 How to Ser up a Reverse SSH access ===
300
301 ==== 2.2.3.1 Step1: Log into the server system ====
302
303 [[image:https://wiki.dragino.com/images/thumb/2/26/Loging_server.png/500px-Loging_server.png||height="69" width="500"]]
304
305 Loging server
306
307
308 ==== 2.2.3.2 Step2:access the gateway ====
309
310 $ cd rssh-server/
311
312 Check the gateway linking to the server $ ./connect-gw.sh -l
313
314 [[image:https://wiki.dragino.com/images/thumb/e/ee/Check_gateway_link_server.png/500px-Check_gateway_link_server.png||height="157" width="500"]]
315
316 Check the gateway linking to the server
317
318
319 access the gateway $ ./connect-gw.sh <GWID>
320
321 [[image:https://wiki.dragino.com/images/thumb/b/b7/Reverse_ssh_access_the_gateway1.png/500px-Reverse_ssh_access_the_gateway1.png||height="230" width="500"]]
322
323 reverse ssh access the gateway

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