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Wiki source code of Remote Access Gateway

Version 19.11 by Xiaoling on 2022/05/31 15:55
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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 == **2.1 For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355** ==
40
41 === **2.1.1 End User Guide to use SSH access** ===
42
43 Go to this the Reverse SSH page as below:
44
45 [[image:image-20220527102348-1.png]]
46
47 Get the RSSH configure page
48
49
50 [[image:image-20220527103251-2.png]]
51
52 Connection OK.
53
54 * (% style="color:#4f81bd" %)**Login ID**(%%): Input (% style="color:#4f81bd" %)**sshuser**
55 * (% style="color:#4f81bd" %)**Host Address**(%%): Input** (% style="color:#4f81bd" %)support.dragino.com(%%)**
56 * (% style="color:#4f81bd" %)**Host Port**(%%): Please email to support @ dragino.com to get a valid host port.
57 * (% style="color:#4f81bd" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
58 * (% 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
59
60 (((
61 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.
62 )))
63
64
65 === **2.1.2 How to Ser up a Reverse SSH access** ===
66
67 Advance administrator can config a SSH server to provide support their end user themselves. Instruction is as below:
68
69 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.
70 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.
71 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.
72 1. Give a free port to the user and ask them to configure RSSH page in the gateway.
73 1. In your server or other machine, you will able to access to the end user device by below command:
74
75 (% class="box" %)
76 (((
77 $ ssh   -p <End User Host Port>   root@<Host Address>
78 )))
79
80 (((
81 (% 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.**
82 )))
83
84
85 ==== **2.1.2.1 Note for set up RSSH server** ====
86
87 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.
88
89 (% class="box" %)
90 (((
91 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
92 COMMAND   PID    USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
93 sshd    21430 sshuser   15u  IPv4 47567059      0t0  TCP localhost:bacula-fd (LISTEN)
94 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430   ~-~-> Kill PID of this process.
95 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102        
96 [root@iZt4n22vqvm7ajogrfiif6Z ~~]#
97 )))
98
99
100 == **2.2 For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111** ==
101
102 Below gateway support reverse SSH access:
103
104 (% class="box" %)
105 (((
106 Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
107 LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
108 LG02, OLG02
109 LG308, DLOS8
110 LPS8
111 LIG16
112 )))
113
114
115 === **2.2.1 End User Guide to use SSH access** ===
116
117 ==== **2.2.1.1 Install the SSH service for server** ====
118
119 ===== **2.2.1.1.1 Step 1 : Download the SSH service code** =====
120
121 1).git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
122
123 [[image:image-20220527105447-1.png]]
124
125 git clone rssh-server
126
127
128 2).cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
129
130 [[image:image-20220527105511-2.png]]
131
132 Generate the execute file
133
134
135 **Debug** :
136
137 (% class="box" %)
138 (((
139 if you git fail.  ~-~->    (% style="color:#4f81bd" %)**sudo: git: command not found.**(%%)
140 please install git.  ~-~->  (% style="color:#4f81bd" %)**yum install git -y  or  apt-get install git -y.**
141 )))
142
143 (% class="box" %)
144 (((
145 if you make error 127,it** (% style="color:#4f81bd" %)lack of gcc.(%%)**
146 please install gcc.    ~-~->(% style="color:#4f81bd" %)**yum install gcc.**
147 )))
148
149 [[image:image-20220527105856-3.png]]
150
151 lack of gcc
152
153 (% class="box" %)
154 (((
155 if you make a fatal error : sqlite3.h,it (% style="color:#4f81bd" %)**lack of sqlite3.**(%%)
156 please insatell (% style="color:#4f81bd" %)**sqlite3**.
157 )))
158
159 [[image:image-20220527105918-4.png]]
160
161 lack of sqlite3
162
163
164 How to install Sqlit3
165
166 (% class="box" %)
167 (((
168 Step1: Download the SQLit3 installation package
169 sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
170 Step2: tar the SQLit3 installation package
171 sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
172 Step3: Generate the makefile
173 cd sqlite-autoconf-3350300/;./configure
174 Step4: Compile makefile
175 sudo make
176 Step5: Install makefile
177 sudo make install
178 Check:
179 cd /usr/local/bin;ls -al                             ~-~->    Check to see if there is a file for sqlite3
180 cd sqlite-autoconf-3350300/;./sqlite3 test.db        ~-~->    Test whether the sqlite3 was installed successfully
181 debug:
182 If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
183 Please execute the command /sbin/ldconfig.
184 After that execute the command ./sqlite3 test.db again.
185 )))
186
187
188 ===== **2.2.1.1.2 Step 2 : Install and run the RSS service** =====
189
190 1): intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
191
192 user must enter the root account and run the following commands
193
194 (% class="box" %)
195 (((
196 $ ./create_sqlite3_db.sh
197 $ ./rssh_serv -p  3721 2>&1 &
198 $ ps -ef | grep rssh_serv check 3721 port
199 )))
200
201 [[image:image-20220527110436-6.png]]
202
203 intall database and server development port
204
205 **Debug:**
206
207 (% class="box" %)
208 (((
209 Check /var/rsshdb.sqlite3 ~-~->(% style="color:#4f81bd" %)** ls /var/rsshdb.sqlite3**(%%)
210 Check ls /var/rsshdb.sqlite3 ~-~-> (% style="color:#4f81bd" %)**sudo chmod 777 rssh_serv**
211 )))
212
213 (% class="box" %)
214 (((
215 if** fail to open dpvlry or to bind to it**
216 please kill rssh_serv,and run (% style="color:#4f81bd" %)** ./rssh_serv -p  3721 2>&1 &** (%%) again
217 )))
218
219
220 ===== **2.2.1.1.3 Step 3 : Create a minimal SSH user (reverse SSH proxy for the gateway)** =====
221
222 **1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%)** (custom user name)
223
224 **2):** (% style="color:#4f81bd" %)**sudo passwd xxxxxx**
225
226 **3):** (% style="color:#4f81bd" %)**cp /bin/bash /bin/rbash**
227
228 **4):** (% style="color:#4f81bd" %)**sudo nano /etc/passwd**(%%) ~-~-> Change /bin/bash to /bin/rbash
229
230 **5):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bashrc**(%%) **empty it,and input export PATH=$HOME/bin**
231
232 **6):** (% style="color:#4f81bd" %)**sudo nano /home/xxxxx/.bash_profile**(%%) **empty it,and input export PATH=$HOME/bin**
233
234 **Now user "XXXXX" is the user with limited permissions of the current system**
235
236
237 === **2.2.2 How does user get the gateway to connect to a user's private server** ===
238
239 ===== **2.2.2.1 Step 1 : Come bace the gateway web UI for get the gateway Public key** =====
240
241 1) in the system ~-~-> (% style="color:#4f81bd" %)**Remote Mgmt/span>**
242
243 [[image:image-20220527110531-7.png]]
244
245 Remote Mgmt
246
247
248 ===== **2.2.2.2 Step 2 : Authorization server** =====
249
250 copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
251
252 [[image:image-20220527110625-8.png]]
253
254 Publickey
255
256
257 ===== **2.2.2.3 Step 3 : connecte private server** =====
258
259 in the gateway web UI
260
261 [[image:image-20220527110700-9.png]]
262
263 gateway web UI
264
265 (% class="box" %)
266 (((
267 (% style="color:#4f81bd" %)**Connection Type **(%%) : If user's least privileged user with private server uses a password, select (% style="color:#4f81bd" %)**Public Key**(%%)
268 **Note:if user's least privileged user no uses a password,choose from both is fine**
269 (% style="color:#4f81bd" %)**Login ID**(%%)             : Input user name "eg : "XXXXX"
270 (% style="color:#4f81bd" %)**Host Address**(%%)         : Input user's private server address
271 (% style="color:#4f81bd" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
272 Click Save and then Connect
273 )))
274
275
276 ===== **2.2.2.4 Step 4 : Cheak is fine** =====
277
278 Rssh Host connection Ok
279
280 [[image:image-20220527111009-10.png]]
281
282 Rssh Host connection Ok
283
284
285 user can use common ps | grep ssh to check it in the gateway.
286
287 [[image:image-20220527111041-11.png]]
288
289 Check the gateway
290
291
292 ===== **2.2.2.5 Step 5 : Create an authorization key file** =====
293
294 1):sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
295
296 **Debug:**
297
298 (% class="box" %)
299 (((
300 check: sudo ls /home/xxxxx/.ssh/authorizedkey
301 )))
302
303
304 === **2.2.3 How to Ser up a Reverse SSH access** ===
305
306 ==== **2.2.3.1 Step 1 : Log into the server system** ====
307
308 [[image:image-20220527111145-12.png]]
309
310 Loging server
311
312
313 ==== **2.2.3.2 Step2:access the gateway** ====
314
315 (% class="box" %)
316 (((
317 $ cd rssh-server/
318 )))
319
320 Check the gateway linking to the server $ ./connect-gw.sh -l
321
322 [[image:image-20220527111219-13.png]]
323
324 Check the gateway linking to the server
325
326
327 access the gateway $ ./connect-gw.sh <GWID>
328
329 [[image:image-20220527111300-14.png]]
330
331 reverse ssh access the gateway