Wiki source code of Remote Access Gateway

Version 19.1 by Xiaoling on 2022/05/27 11:15

version	line-number	content
1.2	1	Contents:
	2
1.1	3	{{toc/}}
	4
	5
18.4	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
2.15	10	(% style="color:red" %)Important Notice:
1.1	11
2.15	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.
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
18.4	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
2.15	22	(% style="color:red" %)Important Notice:
1.1	23
2.15	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.
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
18.4	38	== 2.1 For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355 ==
1.2	39
18.4	40	=== 2.1.1 End User Guide to use SSH access ===
	41
1.2	42	Go to this the Reverse SSH page as below:
	43
3.2	44	[[image:image-20220527102348-1.png]]
1.2	45
	46	Get the RSSH configure page
	47
	48
4.2	49	[[image:image-20220527103251-2.png]]
1.2	50
	51	Connection OK.
	52
4.3	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
1.2	58
2.2	59	(((
1.2	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.
2.2	61	)))
1.2	62
	63
18.5	64	=== 2.1.2 How to Ser up a Reverse SSH access ===
1.2	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.
4.3	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.
1.2	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
2.5	74	(% class="box" %)
	75	(((
2.10	76	$ ssh -p <End User Host Port> root@<Host Address>
2.5	77	)))
1.2	78
2.5	79	(((
4.4	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.
2.5	81	)))
1.2	82
2.3	83
18.5	84	==== 2.1.2.1 Note for set up RSSH server ====
1.2	85
2.9	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.
1.2	87
2.4	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	)))
1.2	97
2.11	98
18.5	99	== 2.2 For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111 ==
1.2	100
	101	Below gateway support reverse SSH access:
	102
2.5	103	(% class="box" %)
	104	(((
2.11	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
2.5	111	)))
1.2	112
2.11	113
18.5	114	=== 2.2.1 End User Guide to use SSH access ===
1.2	115
18.5	116	==== 2.2.1.1 Install the SSH service for server ====
1.2	117
18.5	118	===== 2.2.1.1.1 Step 1:Download the SSH service code =====
1.2	119
	120	1).git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
	121
6.2	122	[[image:image-20220527105447-1.png]]
1.2	123
	124	git clone rssh-server
	125
2.5	126
1.2	127	2).cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
	128
6.2	129	[[image:image-20220527105511-2.png]]
1.2	130
	131	Generate the execute file
	132
6.2	133
1.2	134	Debug :
	135
2.5	136	(% class="box" %)
	137	(((
6.3	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.
2.5	140	)))
1.2	141
2.5	142	(% class="box" %)
	143	(((
6.3	144	if you make error 127,it (% style="color:#4f81bd" %)lack of gcc.(%%)
	145	please install gcc. ~-~->(% style="color:#4f81bd" %)yum install gcc.
2.5	146	)))
1.2	147
8.2	148	[[image:image-20220527105856-3.png]]
1.2	149
	150	lack of gcc
	151
2.5	152	(% class="box" %)
	153	(((
6.3	154	if you make a fatal error : sqlite3.h,it (% style="color:#4f81bd" %)lack of sqlite3.(%%)
	155	please insatell (% style="color:#4f81bd" %)sqlite3.
2.5	156	)))
1.2	157
8.2	158	[[image:image-20220527105918-4.png]]
1.2	159
	160	lack of sqlite3
	161
8.2	162
1.2	163	How to install Sqlit3
	164
2.5	165	(% class="box" %)
	166	(((
2.12	167	Step1: Download the SQLit3 installation package
2.5	168	sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
2.12	169	Step2: tar the SQLit3 installation package
1.2	170	sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
2.12	171	Step3: Generate the makefile
1.2	172	cd sqlite-autoconf-3350300/;./configure
2.12	173	Step4: Compile makefile
1.2	174	sudo make
2.12	175	Step5: Install makefile
1.2	176	sudo make install
2.5	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:
1.2	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.
2.5	184	)))
1.2	185
2.5	186
18.5	187	===== 2.2.1.1.2 Step 2 :Install and run the RSS service =====
1.2	188
12.2	189	1): intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
1.2	190
	191	user must enter the root account and run the following commands
	192
2.5	193	(% class="box" %)
	194	(((
2.13	195	$ ./create_sqlite3_db.sh
	196	$ ./rssh_serv -p 3721 2>&1 &
	197	$ ps -ef \| grep rssh_serv check 3721 port
2.5	198	)))
1.2	199
10.2	200	[[image:image-20220527110436-6.png]]
1.2	201
	202	intall database and server development port
	203
	204	Debug:
	205
2.5	206	(% class="box" %)
	207	(((
9.2	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
2.5	210	)))
1.2	211
2.5	212	(% class="box" %)
	213	(((
2.15	214	if fail to open dpvlry or to bind to it
9.2	215	please kill rssh_serv,and run (% style="color:#4f81bd" %) ./rssh_serv -p 3721 2>&1 & (%%) again
2.5	216	)))
1.2	217
2.5	218
18.5	219	===== 2.2.1.1.3 Step 3 :Create a minimal SSH user (reverse SSH proxy for the gateway) =====
1.2	220
9.2	221	1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%) (custom user name)
1.2	222
9.2	223	2): (% style="color:#4f81bd" %)sudo passwd xxxxxx
1.2	224
9.2	225	3): (% style="color:#4f81bd" %)cp /bin/bash /bin/rbash
1.2	226
9.2	227	4): (% style="color:#4f81bd" %)sudo nano /etc/passwd(%%) ~-~-> Change /bin/bash to /bin/rbash
1.2	228
9.2	229	5): (% style="color:#4f81bd" %)sudo nano /home/xxxxx/.bashrc(%%) empty it,and input export PATH=$HOME/bin
1.2	230
9.2	231	6): (% style="color:#4f81bd" %)sudo nano /home/xxxxx/.bash_profile(%%) empty it,and input export PATH=$HOME/bin
1.2	232
	233	Now user "XXXXX" is the user with limited permissions of the current system
	234
2.5	235
18.5	236	=== 2.2.2 How does user get the gateway to connect to a user's private server ===
1.2	237
18.5	238	===== 2.2.2.1 Step1: Come bace the gateway web UI for get the gateway Public key =====
1.2	239
10.2	240	1) in the system ~-~-> (% style="color:#4f81bd" %)Remote Mgmt/span>
1.2	241
12.2	242	[[image:image-20220527110531-7.png]]
1.2	243
	244	Remote Mgmt
	245
2.6	246
12.2	247	===== 2.2.2.2 Step2: Authorization server =====
1.2	248
	249	copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
	250
12.2	251	[[image:image-20220527110625-8.png]]
1.2	252
	253	Publickey
	254
2.6	255
12.2	256	===== 2.2.2.3 Step3: connecte private server =====
1.2	257
	258	in the gateway web UI
	259
13.2	260	[[image:image-20220527110700-9.png]]
1.2	261
	262	gateway web UI
	263
2.6	264	(% class="box" %)
	265	(((
13.3	266	(% style="color:#4f81bd" %)Connection Type (%%) : If user's least privileged user with private server uses a password, select (% style="color:#4f81bd" %)Public Key(%%)
2.6	267	Note:if user's least privileged user no uses a password,choose from both is fine
13.3	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.
1.2	271	Click Save and then Connect
2.6	272	)))
1.2	273
2.7	274
13.4	275	===== 2.2.2.4 Step 4 :Cheak is fine =====
1.2	276
	277	Rssh Host connection Ok
	278
15.2	279	[[image:image-20220527111009-10.png]]
1.2	280
	281	Rssh Host connection Ok
	282
2.7	283
1.2	284	user can use common ps \| grep ssh to check it in the gateway.
	285
15.2	286	[[image:image-20220527111041-11.png]]
1.2	287
	288	Check the gateway
	289
	290
15.2	291	===== 2.2.2.5 Step5:Create an authorization key file =====
1.2	292
	293	1):sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
	294
	295	Debug:
	296
2.7	297	(% class="box" %)
	298	(((
	299	check: sudo ls /home/xxxxx/.ssh/authorizedkey
	300	)))
1.2	301
	302
17.2	303	=== 2.2.3 How to Ser up a Reverse SSH access ===
1.2	304
17.2	305	==== 2.2.3.1 Step1: Log into the server system ====
1.2	306
17.2	307	[[image:image-20220527111145-12.png]]
	308
1.2	309	Loging server
	310
2.8	311
17.2	312	==== 2.2.3.2 Step2:access the gateway ====
1.2	313
18.2	314	(% class="box" %)
	315	(((
1.2	316	$ cd rssh-server/
18.2	317	)))
1.2	318
	319	Check the gateway linking to the server $ ./connect-gw.sh -l
	320
17.2	321	[[image:image-20220527111219-13.png]]
1.2	322
	323	Check the gateway linking to the server
	324
	325
	326	access the gateway $ ./connect-gw.sh <GWID>
	327
18.2	328	[[image:image-20220527111300-14.png]]
1.2	329
	330	reverse ssh access the gateway

Wiki source code of Remote Access Gateway

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