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Wiki source code of Remote Access Gateway

Version 2.4 by Xiaoling on 2022/05/12 14:24
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Xiaoling 1.2 1 **Contents:**
2
Xiaoling 1.1 3 {{toc/}}
4
5
Xiaoling 1.2 6 = 1. Use Remote.it service =
Xiaoling 1.1 7
Xiaoling 1.2 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.
Xiaoling 1.1 9
Xiaoling 1.3 10 (% class="mark" %)**Important Notice:**
Xiaoling 1.1 11
Xiaoling 1.3 12 * (% class="mark" %)**Remote.it access will give full control of your device to remote support.**
13 * (% class="mark" %)**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.**
Xiaoling 1.1 14
Xiaoling 1.2 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]].
Xiaoling 1.1 16
17
Xiaoling 1.2 18 = 2. RSSH Introduction =
Xiaoling 1.1 19
Xiaoling 1.2 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.
Xiaoling 1.1 21
Xiaoling 1.3 22 (% class="mark" %)**Important Notice:**
Xiaoling 1.1 23
Xiaoling 1.3 24 * (% class="mark" %)**RSSH access will give full control of your device to remote support. Please remove sensitivity info before perform this**
25 * (% class="mark" %)**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.**
Xiaoling 1.1 26
Xiaoling 1.2 27 Below gateway support reverse SSH access:
Xiaoling 1.1 28
Xiaoling 1.2 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.
Xiaoling 1.1 36
Xiaoling 1.2 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:https://wiki.dragino.com/images/thumb/5/55/RSSH_Menu2.png/500px-RSSH_Menu2.png||height="256" width="500"]]
44
45 Get the RSSH configure page
46
47
48 [[image:https://wiki.dragino.com/images/thumb/7/78/RSSH_Menu3.png/500px-RSSH_Menu3.png||height="313" width="500"]]
49
50 Connection OK.
51
Xiaoling 2.2 52 * (% class="mark" %)**Login ID**(%%): Input (% class="mark" %)**sshuser**
53 * (% class="mark" %)**Host Address**(%%): Input(% class="mark" %)** support.dragino.com**
54 * (% class="mark" %)**Host Port**(%%): Please email to support @ dragino.com to get a valid host port.
55 * (% class="mark" %)**Connect at Startupt**(%%): Choose to enable connect once device is powered.
56 * (% class="mark" %)**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
Xiaoling 1.2 57
Xiaoling 2.2 58 (((
Xiaoling 1.2 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.
Xiaoling 2.2 60 )))
Xiaoling 1.2 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.
Xiaoling 2.3 68 1. In the gateway settings, The (% class="mark" %)**Login ID**(%%) will be the SSH user for this server and the (% class="mark" %)**Host Address**(%%) is the server address.
Xiaoling 1.2 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 {{{ $ ssh -p <End User Host Port> root@<Host Address>
74 }}}
75
Xiaoling 2.3 76 (% class="mark" %)**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.**
Xiaoling 1.2 77
Xiaoling 2.3 78
Xiaoling 1.2 79 ==== 2.1.2.1 Note for set up RSSH server ====
80
81 * 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.
82
Xiaoling 2.4 83 (% class="box" %)
84 (((
85 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
86 COMMAND   PID    USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
87 sshd    21430 sshuser   15u  IPv4 47567059      0t0  TCP localhost:bacula-fd (LISTEN)
88 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430   ~-~-> Kill PID of this process.
89 [root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102        
90 [root@iZt4n22vqvm7ajogrfiif6Z ~~]#
91 )))
Xiaoling 1.2 92
93 == 2.2 For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111 ==
94
95 Below gateway support reverse SSH access:
96
97 {{{ Firmware Version >lgw--build-v5.4.1618196981-20210412-1111 Firmware Download
98 LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
99 LG02, OLG02
100 LG308, DLOS8
101 LPS8
102 LIG16
103 }}}
104
105 === 2.2.1 End User Guide to use SSH access ===
106
107 ==== 2.2.1.1 Install the SSH service for server ====
108
109 ===== 2.2.1.1.1 Step 1:Download the SSH service code =====
110
111 1).git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
112
113 [[image:https://wiki.dragino.com/images/thumb/d/d0/Git_clone.png/500px-Git_clone.png||height="80" width="500"]]
114
115 git clone rssh-server
116
117 2).cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
118
119 [[image:https://wiki.dragino.com/images/thumb/e/e3/Generate_the_execute_file.png/500px-Generate_the_execute_file.png||height="103" width="500"]]
120
121 Generate the execute file
122
123 **Debug** :
124
125 {{{ if you git fail. --> sudo: git: command not found.
126 please install git. --> yum install git -y or apt-get install git -y.
127 }}}
128
129 {{{ if you make error 127,it lack of gcc.
130 please install gcc. -->yum install gcc.
131 }}}
132
133 [[image:https://wiki.dragino.com/images/d/d7/Lack_of_gcc.png||height="174" width="434"]]
134
135 lack of gcc
136
137 {{{ if you make a fatal error : sqlite3.h,it lack of sqlite3.
138 please insatell sqlite3.
139 }}}
140
141 [[image:https://wiki.dragino.com/images/thumb/9/93/Lack_of_sqlite3.png/500px-Lack_of_sqlite3.png||height="137" width="500"]]
142
143 lack of sqlite3
144
145 How to install Sqlit3
146
147 {{{ Step1:Download the SQLit3 installation package
148 sudo wget
149 Step2:tar the SQLit3 installation package
150 sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
151 Step3:Generate the makefile
152 cd sqlite-autoconf-3350300/;./configure
153 Step4:Compile makefile
154 sudo make
155 Step5:Install makefile
156 sudo make install
157 Check:
158 cd /usr/local/bin;ls -al --> Check to see if there is a file for sqlite3
159 cd sqlite-autoconf-3350300/;./sqlite3 test.db --> Test whether the sqlite3 was installed successfully
160 debug:
161 If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
162 Please execute the command /sbin/ldconfig.
163 After that execute the command ./sqlite3 test.db again.
164 }}}
165
166 ===== 2.2.1.1.2 Step 2 :Install and run the RSS service =====
167
168 1):intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
169
170 user must enter the root account and run the following commands
171
172 {{{ $ ./create_sqlite3_db.sh
173 $ ./rssh_serv -p 3721 2>&1 &
174 $ ps -ef | grep rssh_serv check 3721 port
175 }}}
176
177 [[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"]]
178
179 intall database and server development port
180
181 **Debug:**
182
183 {{{ Check /var/rsshdb.sqlite3 --> ls /var/rsshdb.sqlite3
184 Check ls /var/rsshdb.sqlite3 --> sudo chmod 777 rssh_serv
185 }}}
186
187 {{{ if fail to open dpvlry or to bind to it
188 please kill rssh_serv,and run ./rssh_serv -p 3721 2>&1 & again
189 }}}
190
191 ===== 2.2.1.1.3 Step 3 :Create a minimal SSH user (reverse SSH proxy for the gateway) =====
192
193 1):sudo useradd XXXXX (custom user name)
194
195 2):sudo passwd xxxxxx
196
197 3):cp /bin/bash /bin/rbash
198
199 4):sudo nano /etc/passwd ~-~-> Change /bin/bash to /bin/rbash
200
201 5):sudo nano /home/xxxxx/.bashrc **empty it,and input export PATH=$HOME/bin**
202
203 6):sudo nano /home/xxxxx/.bash_profile **empty it,and input export PATH=$HOME/bin**
204
205 **Now user "XXXXX" is the user with limited permissions of the current system**
206
207 === 2.2.2 How does user get the gateway to connect to a user's private server ===
208
209 ===== 2.2.2.1 Step1: Come bace the gateway web UI for get the gateway Public key =====
210
211 1)in the system ~-~-> Remote Mgmt/span>
212
213 [[image:https://wiki.dragino.com/images/thumb/8/8f/Remote_Mgmt.png/500px-Remote_Mgmt.png||height="367" width="500"]]
214
215 Remote Mgmt
216
217 ===== 2.2.2.2 Step2: Authorization server =====
218
219 copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
220
221 [[image:https://wiki.dragino.com/images/thumb/4/49/Publickey.png/500px-Publickey.png||height="81" width="500"]]
222
223 Publickey
224
225 ===== 2.2.2.3 Step3: connecte private server =====
226
227 in the gateway web UI
228
229 [[image:https://wiki.dragino.com/images/thumb/0/04/Gateway_web_UI.png/500px-Gateway_web_UI.png||height="389" width="500"]]
230
231 gateway web UI
232
233 {{{Connection Type : If user's least privileged user with private server uses a password, select Public Key
234 Note:if user's least privileged user no uses a password,choose from both is fine
235 Login ID : Input user name "eg : "XXXXX"
236 Host Address : Input user's private server address
237 Connect at Startupt: : Choose to enable connect once device is powered.
238 Click Save and then Connect
239 }}}
240
241 ===== 2.2.2.4 Step 4 :Cheak is fine =====
242
243 Rssh Host connection Ok
244
245 [[image:https://wiki.dragino.com/images/thumb/6/6f/Rssh_Host_connection_Ok.png/500px-Rssh_Host_connection_Ok.png||height="225" width="500"]]
246
247 Rssh Host connection Ok
248
249 user can use common ps | grep ssh to check it in the gateway.
250
251 [[image:https://wiki.dragino.com/images/thumb/a/ad/Check_the_gateway.png/500px-Check_the_gateway.png||height="47" width="500"]]
252
253 Check the gateway
254
255
256 ===== 2.2.2.5 Step5:Create an authorization key file =====
257
258 1):sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
259
260 **Debug:**
261
262 {{{ check: sudo ls /home/xxxxx/.ssh/authorizedkey
263 }}}
264
265 === 2.2.3 How to Ser up a Reverse SSH access ===
266
267 ==== 2.2.3.1 Step1: Log into the server system ====
268
269 [[image:https://wiki.dragino.com/images/thumb/2/26/Loging_server.png/500px-Loging_server.png||height="69" width="500"]]
270
271 Loging server
272
273 ==== 2.2.3.2 Step2:access the gateway ====
274
275 $ cd rssh-server/
276
277
278 Check the gateway linking to the server $ ./connect-gw.sh -l
279
280 [[image:https://wiki.dragino.com/images/thumb/e/ee/Check_gateway_link_server.png/500px-Check_gateway_link_server.png||height="157" width="500"]]
281
282 Check the gateway linking to the server
283
284
285 access the gateway $ ./connect-gw.sh <GWID>
286
287 [[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"]]
288
289 reverse ssh access the gateway