Wiki source code of Remote Access Gateway

Version 19.16 by Xiaoling on 2022/07/14 14:02

version	line-number	content
19.15	1	Table of Contents:
1.2	2
1.1	3	{{toc/}}
	4
	5
19.2	6
18.4	7	= 1. Use Remote.it service =
1.1	8
19.15	9
1.2	10	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	11
2.15	12	(% style="color:red" %)Important Notice:
1.1	13
2.15	14	(% style="color:red" %)* Remote.it access will give full control of your device to remote support.
	15	~* 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	16
1.2	17	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	18
	19
18.4	20	= 2. RSSH Introduction =
1.1	21
19.15	22
1.2	23	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	24
2.15	25	(% style="color:red" %)Important Notice:
1.1	26
2.15	27	(% style="color:red" %)* RSSH access will give full control of your device to remote support. Please remove sensitivity info before perform this
	28	~* 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	29
1.2	30	Below gateway support reverse SSH access:
1.1	31
1.2	32	* Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
	33	* LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
	34	* LG02, OLG02
	35	* LG308, DLOS8
	36	* LPS8
	37	* LIG16
	38	* MS14 series if installed with the same firmware.
1.1	39
1.2	40
19.13	41
19.15	42
18.4	43	== 2.1 For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355 ==
1.2	44
19.16	45
18.4	46	=== 2.1.1 End User Guide to use SSH access ===
	47
19.16	48
1.2	49	Go to this the Reverse SSH page as below:
	50
3.2	51	[[image:image-20220527102348-1.png]]
1.2	52
	53	Get the RSSH configure page
	54
	55
4.2	56	[[image:image-20220527103251-2.png]]
1.2	57
	58	Connection OK.
	59
19.16	60	* (% style="color:#4f81bd" %)Login ID(%%): Input (% style="color:#4f81bd" %)sshuser
	61	* (% style="color:#4f81bd" %)Host Address(%%): Input (% style="color:#4f81bd" %)support.dragino.com(%%)
	62	* (% style="color:#4f81bd" %)Host Port(%%): Please email to support @ dragino.com to get a valid host port.
4.3	63	* (% style="color:#4f81bd" %)Connect at Startupt(%%): Choose to enable connect once device is powered.
19.16	64	* (% 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	65
2.2	66	(((
1.2	67	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	68	)))
1.2	69
	70
18.5	71	=== 2.1.2 How to Ser up a Reverse SSH access ===
1.2	72
	73	Advance administrator can config a SSH server to provide support their end user themselves. Instruction is as below:
	74
	75	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	76	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	77	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.
	78	1. Give a free port to the user and ask them to configure RSSH page in the gateway.
	79	1. In your server or other machine, you will able to access to the end user device by below command:
	80
2.5	81	(% class="box" %)
	82	(((
2.10	83	$ ssh -p <End User Host Port> root@<Host Address>
2.5	84	)))
1.2	85
2.5	86	(((
4.4	87	(% 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	88	)))
1.2	89
2.3	90
18.5	91	==== 2.1.2.1 Note for set up RSSH server ====
1.2	92
2.9	93	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	94
2.4	95	(% class="box" %)
	96	(((
	97	[root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
	98	COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
	99	sshd 21430 sshuser 15u IPv4 47567059 0t0 TCP localhost:bacula-fd (LISTEN)
	100	[root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430 ~-~-> Kill PID of this process.
	101	[root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102
	102	[root@iZt4n22vqvm7ajogrfiif6Z ~~]#
	103	)))
1.2	104
2.11	105
18.5	106	== 2.2 For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111 ==
1.2	107
	108	Below gateway support reverse SSH access:
	109
2.5	110	(% class="box" %)
	111	(((
2.11	112	Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
	113	LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
	114	LG02, OLG02
	115	LG308, DLOS8
	116	LPS8
	117	LIG16
2.5	118	)))
1.2	119
2.11	120
18.5	121	=== 2.2.1 End User Guide to use SSH access ===
1.2	122
18.5	123	==== 2.2.1.1 Install the SSH service for server ====
1.2	124
19.4	125	===== 2.2.1.1.1 Step 1 : Download the SSH service code =====
1.2	126
	127	1).git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
	128
6.2	129	[[image:image-20220527105447-1.png]]
1.2	130
	131	git clone rssh-server
	132
2.5	133
1.2	134	2).cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
	135
6.2	136	[[image:image-20220527105511-2.png]]
1.2	137
	138	Generate the execute file
	139
6.2	140
1.2	141	Debug :
	142
2.5	143	(% class="box" %)
	144	(((
6.3	145	if you git fail. ~-~-> (% style="color:#4f81bd" %)sudo: git: command not found.(%%)
	146	please install git. ~-~-> (% style="color:#4f81bd" %)yum install git -y or apt-get install git -y.
2.5	147	)))
1.2	148
2.5	149	(% class="box" %)
	150	(((
6.3	151	if you make error 127,it (% style="color:#4f81bd" %)lack of gcc.(%%)
	152	please install gcc. ~-~->(% style="color:#4f81bd" %)yum install gcc.
2.5	153	)))
1.2	154
8.2	155	[[image:image-20220527105856-3.png]]
1.2	156
	157	lack of gcc
	158
2.5	159	(% class="box" %)
	160	(((
6.3	161	if you make a fatal error : sqlite3.h,it (% style="color:#4f81bd" %)lack of sqlite3.(%%)
	162	please insatell (% style="color:#4f81bd" %)sqlite3.
2.5	163	)))
1.2	164
8.2	165	[[image:image-20220527105918-4.png]]
1.2	166
	167	lack of sqlite3
	168
8.2	169
1.2	170	How to install Sqlit3
	171
2.5	172	(% class="box" %)
	173	(((
2.12	174	Step1: Download the SQLit3 installation package
2.5	175	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	176	Step2: tar the SQLit3 installation package
1.2	177	sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
2.12	178	Step3: Generate the makefile
1.2	179	cd sqlite-autoconf-3350300/;./configure
2.12	180	Step4: Compile makefile
1.2	181	sudo make
2.12	182	Step5: Install makefile
1.2	183	sudo make install
2.5	184	Check:
	185	cd /usr/local/bin;ls -al ~-~-> Check to see if there is a file for sqlite3
	186	cd sqlite-autoconf-3350300/;./sqlite3 test.db ~-~-> Test whether the sqlite3 was installed successfully
	187	debug:
1.2	188	If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
	189	Please execute the command /sbin/ldconfig.
	190	After that execute the command ./sqlite3 test.db again.
2.5	191	)))
1.2	192
2.5	193
19.4	194	===== 2.2.1.1.2 Step 2 : Install and run the RSS service =====
1.2	195
12.2	196	1): intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
1.2	197
	198	user must enter the root account and run the following commands
	199
2.5	200	(% class="box" %)
	201	(((
2.13	202	$ ./create_sqlite3_db.sh
	203	$ ./rssh_serv -p 3721 2>&1 &
	204	$ ps -ef \| grep rssh_serv check 3721 port
2.5	205	)))
1.2	206
10.2	207	[[image:image-20220527110436-6.png]]
1.2	208
	209	intall database and server development port
	210
	211	Debug:
	212
2.5	213	(% class="box" %)
	214	(((
9.2	215	Check /var/rsshdb.sqlite3 ~-~->(% style="color:#4f81bd" %) ls /var/rsshdb.sqlite3(%%)
	216	Check ls /var/rsshdb.sqlite3 ~-~-> (% style="color:#4f81bd" %)sudo chmod 777 rssh_serv
2.5	217	)))
1.2	218
2.5	219	(% class="box" %)
	220	(((
2.15	221	if fail to open dpvlry or to bind to it
9.2	222	please kill rssh_serv,and run (% style="color:#4f81bd" %) ./rssh_serv -p 3721 2>&1 & (%%) again
2.5	223	)))
1.2	224
2.5	225
19.5	226	===== 2.2.1.1.3 Step 3 : Create a minimal SSH user (reverse SSH proxy for the gateway) =====
1.2	227
9.2	228	1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%) (custom user name)
1.2	229
9.2	230	2): (% style="color:#4f81bd" %)sudo passwd xxxxxx
1.2	231
9.2	232	3): (% style="color:#4f81bd" %)cp /bin/bash /bin/rbash
1.2	233
9.2	234	4): (% style="color:#4f81bd" %)sudo nano /etc/passwd(%%) ~-~-> Change /bin/bash to /bin/rbash
1.2	235
9.2	236	5): (% style="color:#4f81bd" %)sudo nano /home/xxxxx/.bashrc(%%) empty it,and input export PATH=$HOME/bin
1.2	237
9.2	238	6): (% style="color:#4f81bd" %)sudo nano /home/xxxxx/.bash_profile(%%) empty it,and input export PATH=$HOME/bin
1.2	239
	240	Now user "XXXXX" is the user with limited permissions of the current system
	241
2.5	242
18.5	243	=== 2.2.2 How does user get the gateway to connect to a user's private server ===
1.2	244
19.6	245	===== 2.2.2.1 Step 1 : Come bace the gateway web UI for get the gateway Public key =====
1.2	246
19.14	247	1) in the system ~-~-> (% style="color:#4f81bd" %)Remote Mgmt
1.2	248
12.2	249	[[image:image-20220527110531-7.png]]
1.2	250
	251	Remote Mgmt
	252
2.6	253
19.7	254	===== 2.2.2.2 Step 2 : Authorization server =====
1.2	255
	256	copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
	257
12.2	258	[[image:image-20220527110625-8.png]]
1.2	259
	260	Publickey
	261
2.6	262
19.8	263	===== 2.2.2.3 Step 3 : connecte private server =====
1.2	264
	265	in the gateway web UI
	266
13.2	267	[[image:image-20220527110700-9.png]]
1.2	268
	269	gateway web UI
	270
2.6	271	(% class="box" %)
	272	(((
13.3	273	(% 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	274	Note:if user's least privileged user no uses a password,choose from both is fine
13.3	275	(% style="color:#4f81bd" %)Login ID(%%) : Input user name "eg : "XXXXX"
	276	(% style="color:#4f81bd" %)Host Address(%%) : Input user's private server address
	277	(% style="color:#4f81bd" %)Connect at Startupt(%%): Choose to enable connect once device is powered.
1.2	278	Click Save and then Connect
2.6	279	)))
1.2	280
2.7	281
19.9	282	===== 2.2.2.4 Step 4 : Cheak is fine =====
1.2	283
	284	Rssh Host connection Ok
	285
15.2	286	[[image:image-20220527111009-10.png]]
1.2	287
	288	Rssh Host connection Ok
	289
2.7	290
1.2	291	user can use common ps \| grep ssh to check it in the gateway.
	292
15.2	293	[[image:image-20220527111041-11.png]]
1.2	294
	295	Check the gateway
	296
	297
19.10	298	===== 2.2.2.5 Step 5 : Create an authorization key file =====
1.2	299
	300	1):sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
	301
	302	Debug:
	303
2.7	304	(% class="box" %)
	305	(((
	306	check: sudo ls /home/xxxxx/.ssh/authorizedkey
	307	)))
1.2	308
	309
17.2	310	=== 2.2.3 How to Ser up a Reverse SSH access ===
1.2	311
19.11	312	==== 2.2.3.1 Step 1 : Log into the server system ====
1.2	313
17.2	314	[[image:image-20220527111145-12.png]]
	315
1.2	316	Loging server
	317
2.8	318
19.12	319	==== 2.2.3.2 Step 2 : access the gateway ====
1.2	320
18.2	321	(% class="box" %)
	322	(((
1.2	323	$ cd rssh-server/
18.2	324	)))
1.2	325
	326	Check the gateway linking to the server $ ./connect-gw.sh -l
	327
17.2	328	[[image:image-20220527111219-13.png]]
1.2	329
	330	Check the gateway linking to the server
	331
	332
	333	access the gateway $ ./connect-gw.sh <GWID>
	334
18.2	335	[[image:image-20220527111300-14.png]]
1.2	336
	337	reverse ssh access the gateway

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