Wiki source code of Remote Access Gateway

Version 2.7 by Xiaoling on 2022/05/12 14:47

version	line-number	content
1.2	1	Contents:
	2
1.1	3	{{toc/}}
	4
	5
1.2	6	= 1. Use Remote.it service =
1.1	7
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.
1.1	9
1.3	10	(% class="mark" %)Important Notice:
1.1	11
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.
1.1	14
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]].
1.1	16
	17
1.2	18	= 2. RSSH Introduction =
1.1	19
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.
1.1	21
1.3	22	(% class="mark" %)Important Notice:
1.1	23
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.
1.1	26
1.2	27	Below gateway support reverse SSH access:
1.1	28
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.
1.1	36
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
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
1.2	57
2.2	58	(((
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.
2.2	60	)))
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.
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.
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
2.5	73	(% class="box" %)
	74	(((
	75	$ ssh -p <End User Host Port> root@<Host Address>
	76	)))
1.2	77
2.5	78	(((
2.3	79	(% 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.
2.5	80	)))
1.2	81
2.3	82
1.2	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
2.4	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	)))
1.2	96
	97	== 2.2 For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111 ==
	98
	99	Below gateway support reverse SSH access:
	100
2.5	101	(% class="box" %)
	102	(((
	103	Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
1.2	104	LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
	105	LG02, OLG02
	106	LG308, DLOS8
	107	LPS8
	108	LIG16
2.5	109	)))
1.2	110
	111	=== 2.2.1 End User Guide to use SSH access ===
	112
	113	==== 2.2.1.1 Install the SSH service for server ====
	114
	115	===== 2.2.1.1.1 Step 1:Download the SSH service code =====
	116
	117	1).git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
	118
	119	[[image:https://wiki.dragino.com/images/thumb/d/d0/Git_clone.png/500px-Git_clone.png\|\|height="80" width="500"]]
	120
	121	git clone rssh-server
	122
2.5	123
1.2	124	2).cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
	125
	126	[[image:https://wiki.dragino.com/images/thumb/e/e3/Generate_the_execute_file.png/500px-Generate_the_execute_file.png\|\|height="103" width="500"]]
	127
	128	Generate the execute file
	129
	130	Debug :
	131
2.5	132	(% class="box" %)
	133	(((
	134	if you git fail. ~-~-> (% class="mark" %)sudo: git: command not found.(%%)
	135	please install git. ~-~-> (% class="mark" %)yum install git -y or apt-get install git -y.
	136	)))
1.2	137
2.5	138	(% class="box" %)
	139	(((
	140	if you make error 127,it (% class="mark" %)lack of gcc.(%%)
	141	please install gcc. ~-~->(% class="mark" %)yum install gcc.
	142	)))
1.2	143
	144	[[image:https://wiki.dragino.com/images/d/d7/Lack_of_gcc.png\|\|height="174" width="434"]]
	145
	146	lack of gcc
	147
2.5	148	(% class="box" %)
	149	(((
	150	if you make a fatal error : sqlite3.h,it (% class="mark" %)lack of sqlite3.(%%)
	151	please insatell sqlite3.
	152	)))
1.2	153
	154	[[image:https://wiki.dragino.com/images/thumb/9/93/Lack_of_sqlite3.png/500px-Lack_of_sqlite3.png\|\|height="137" width="500"]]
	155
	156	lack of sqlite3
	157
	158	How to install Sqlit3
	159
2.5	160	(% class="box" %)
	161	(((
	162	Step1:Download the SQLit3 installation package
	163	sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
	164	Step2:tar the SQLit3 installation package
1.2	165	sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
2.5	166	Step3:Generate the makefile
1.2	167	cd sqlite-autoconf-3350300/;./configure
2.5	168	Step4:Compile makefile
1.2	169	sudo make
2.5	170	Step5:Install makefile
1.2	171	sudo make install
2.5	172	Check:
	173	cd /usr/local/bin;ls -al ~-~-> Check to see if there is a file for sqlite3
	174	cd sqlite-autoconf-3350300/;./sqlite3 test.db ~-~-> Test whether the sqlite3 was installed successfully
	175	debug:
1.2	176	If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
	177	Please execute the command /sbin/ldconfig.
	178	After that execute the command ./sqlite3 test.db again.
2.5	179	)))
1.2	180
2.5	181
1.2	182	===== 2.2.1.1.2 Step 2 :Install and run the RSS service =====
	183
	184	1):intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
	185
	186	user must enter the root account and run the following commands
	187
2.5	188	(% class="box" %)
	189	(((
	190	$ ./create_sqlite3_db.sh
	191	$ ./rssh_serv -p 3721 2>&1 &
	192	$ ps -ef \| grep rssh_serv check 3721 port
	193	)))
1.2	194
	195	[[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"]]
	196
	197	intall database and server development port
	198
	199	Debug:
	200
2.5	201	(% class="box" %)
	202	(((
	203	Check /var/rsshdb.sqlite3 ~-~->(% class="mark" %) ls /var/rsshdb.sqlite3(%%)
	204	Check ls /var/rsshdb.sqlite3 ~-~-> (% class="mark" %)sudo chmod 777 rssh_serv
	205	)))
1.2	206
2.5	207	(% class="box" %)
	208	(((
	209	if fail to open dpvlry or to bind to it
	210	please kill rssh_serv,and run (% class="mark" %) ./rssh_serv -p 3721 2>&1 & (%%) again
	211	)))
1.2	212
2.5	213
1.2	214	===== 2.2.1.1.3 Step 3 :Create a minimal SSH user (reverse SSH proxy for the gateway) =====
	215
2.5	216	1):(% class="mark" %)sudo useradd XXXXX(%%) (custom user name)
1.2	217
2.5	218	2):(% class="mark" %)sudo passwd xxxxxx
1.2	219
2.5	220	3):(% class="mark" %)cp /bin/bash /bin/rbash
1.2	221
2.5	222	4):(% class="mark" %)sudo nano /etc/passwd(%%) ~-~-> Change /bin/bash to /bin/rbash
1.2	223
2.5	224	5):(% class="mark" %)sudo nano /home/xxxxx/.bashrc(%%) empty it,and input export PATH=$HOME/bin
1.2	225
2.5	226	6):(% class="mark" %)sudo nano /home/xxxxx/.bash_profile(%%) empty it,and input export PATH=$HOME/bin
1.2	227
	228	Now user "XXXXX" is the user with limited permissions of the current system
	229
2.5	230
1.2	231	=== 2.2.2 How does user get the gateway to connect to a user's private server ===
	232
	233	===== 2.2.2.1 Step1: Come bace the gateway web UI for get the gateway Public key =====
	234
2.5	235	1)in the system ~-~-> (% class="mark" %)Remote Mgmt/span>
1.2	236
	237	[[image:https://wiki.dragino.com/images/thumb/8/8f/Remote_Mgmt.png/500px-Remote_Mgmt.png\|\|height="367" width="500"]]
	238
	239	Remote Mgmt
	240
2.6	241
1.2	242	===== 2.2.2.2 Step2: Authorization server =====
	243
	244	copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
	245
	246	[[image:https://wiki.dragino.com/images/thumb/4/49/Publickey.png/500px-Publickey.png\|\|height="81" width="500"]]
	247
	248	Publickey
	249
2.6	250
1.2	251	===== 2.2.2.3 Step3: connecte private server =====
	252
	253	in the gateway web UI
	254
	255	[[image:https://wiki.dragino.com/images/thumb/0/04/Gateway_web_UI.png/500px-Gateway_web_UI.png\|\|height="389" width="500"]]
	256
	257	gateway web UI
	258
2.6	259	(% class="box" %)
	260	(((
	261	(% class="mark" %)Connection Type (%%) : If user's least privileged user with private server uses a password, select (% class="mark" %)Public Key(%%)
	262	Note:if user's least privileged user no uses a password,choose from both is fine
	263	(% class="mark" %)Login ID(%%) : Input user name "eg : "XXXXX"
	264	(% class="mark" %)Host Address(%%) : Input user's private server address
	265	(% class="mark" %)Connect at Startupt(%%): Choose to enable connect once device is powered.
1.2	266	Click Save and then Connect
2.6	267	)))
1.2	268
2.7	269
1.2	270	===== 2.2.2.4 Step 4 :Cheak is fine =====
	271
	272	Rssh Host connection Ok
	273
	274	[[image:https://wiki.dragino.com/images/thumb/6/6f/Rssh_Host_connection_Ok.png/500px-Rssh_Host_connection_Ok.png\|\|height="225" width="500"]]
	275
	276	Rssh Host connection Ok
	277
2.7	278
1.2	279	user can use common ps \| grep ssh to check it in the gateway.
	280
2.7	281	[[image:https://wiki.dragino.com/images/thumb/a/ad/Check_the_gateway.png/500px-Check_the_gateway.png]]
1.2	282
	283	Check the gateway
	284
	285
	286	===== 2.2.2.5 Step5:Create an authorization key file =====
	287
	288	1):sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
	289
	290	Debug:
	291
2.7	292	(% class="box" %)
	293	(((
	294	check: sudo ls /home/xxxxx/.ssh/authorizedkey
	295	)))
1.2	296
	297	=== 2.2.3 How to Ser up a Reverse SSH access ===
	298
	299	==== 2.2.3.1 Step1: Log into the server system ====
	300
	301	[[image:https://wiki.dragino.com/images/thumb/2/26/Loging_server.png/500px-Loging_server.png\|\|height="69" width="500"]]
	302
	303	Loging server
	304
	305	==== 2.2.3.2 Step2:access the gateway ====
	306
	307	$ cd rssh-server/
	308
	309
	310	Check the gateway linking to the server $ ./connect-gw.sh -l
	311
	312	[[image:https://wiki.dragino.com/images/thumb/e/ee/Check_gateway_link_server.png/500px-Check_gateway_link_server.png\|\|height="157" width="500"]]
	313
	314	Check the gateway linking to the server
	315
	316
	317	access the gateway $ ./connect-gw.sh <GWID>
	318
	319	[[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"]]
	320
	321	reverse ssh access the gateway

Wiki source code of Remote Access Gateway

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