Wiki source code of Remote Access Gateway

Version 19.17 by Xiaoling on 2022/07/14 14:16

version	line-number	content
19.15	1	Table of Contents:
1.2	2
1.1	3	{{toc/}}
	4
	5
19.2	6
19.17	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
19.17	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
19.17	41	== 2.1 For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355 ==
19.13	42
19.15	43
19.17	44	=== 2.1.1 End User Guide to use SSH access ===
1.2	45
19.16	46
1.2	47	Go to this the Reverse SSH page as below:
	48
3.2	49	[[image:image-20220527102348-1.png]]
1.2	50
	51	Get the RSSH configure page
	52
	53
4.2	54	[[image:image-20220527103251-2.png]]
1.2	55
	56	Connection OK.
	57
19.16	58	* (% style="color:#4f81bd" %)Login ID(%%): Input (% style="color:#4f81bd" %)sshuser
	59	* (% style="color:#4f81bd" %)Host Address(%%): Input (% style="color:#4f81bd" %)support.dragino.com(%%)
	60	* (% style="color:#4f81bd" %)Host Port(%%): Please email to support @ dragino.com to get a valid host port.
4.3	61	* (% style="color:#4f81bd" %)Connect at Startupt(%%): Choose to enable connect once device is powered.
19.17	62	* (% 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	63
2.2	64	(((
1.2	65	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	66	)))
1.2	67
	68
	69
19.17	70	=== 2.1.2 How to Ser up a Reverse SSH access ===
	71
	72
1.2	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
1.2	91
19.17	92	==== 2.1.2.1 Note for set up RSSH server ====
	93
2.9	94	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	95
2.4	96	(% class="box" %)
	97	(((
	98	[root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
	99	COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
	100	sshd 21430 sshuser 15u IPv4 47567059 0t0 TCP localhost:bacula-fd (LISTEN)
	101	[root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430 ~-~-> Kill PID of this process.
	102	[root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102
	103	[root@iZt4n22vqvm7ajogrfiif6Z ~~]#
	104	)))
1.2	105
2.11	106
19.17	107	== 2.2 For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111 ==
1.2	108
	109	Below gateway support reverse SSH access:
	110
2.5	111	(% class="box" %)
	112	(((
2.11	113	Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
	114	LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
	115	LG02, OLG02
	116	LG308, DLOS8
	117	LPS8
	118	LIG16
2.5	119	)))
1.2	120
2.11	121
19.17	122	=== 2.2.1 End User Guide to use SSH access ===
1.2	123
	124
19.17	125	==== 2.2.1.1 Install the SSH service for server ====
1.2	126
	127
19.17	128	===== (% style="color:blue" %)Step 1 : Download the SSH service code(%%) =====
	129
	130
	131	1). git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
	132
6.2	133	[[image:image-20220527105447-1.png]]
1.2	134
	135	git clone rssh-server
	136
2.5	137
19.17	138	2). cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
1.2	139
6.2	140	[[image:image-20220527105511-2.png]]
1.2	141
	142	Generate the execute file
	143
6.2	144
1.2	145	Debug :
	146
2.5	147	(% class="box" %)
	148	(((
6.3	149	if you git fail. ~-~-> (% style="color:#4f81bd" %)sudo: git: command not found.(%%)
	150	please install git. ~-~-> (% style="color:#4f81bd" %)yum install git -y or apt-get install git -y.
2.5	151	)))
1.2	152
2.5	153	(% class="box" %)
	154	(((
6.3	155	if you make error 127,it (% style="color:#4f81bd" %)lack of gcc.(%%)
	156	please install gcc. ~-~->(% style="color:#4f81bd" %)yum install gcc.
2.5	157	)))
1.2	158
8.2	159	[[image:image-20220527105856-3.png]]
1.2	160
	161	lack of gcc
	162
2.5	163	(% class="box" %)
	164	(((
6.3	165	if you make a fatal error : sqlite3.h,it (% style="color:#4f81bd" %)lack of sqlite3.(%%)
	166	please insatell (% style="color:#4f81bd" %)sqlite3.
2.5	167	)))
1.2	168
8.2	169	[[image:image-20220527105918-4.png]]
1.2	170
	171	lack of sqlite3
	172
8.2	173
19.17	174	(% style="color:blue" %)How to install Sqlit3:
1.2	175
2.5	176	(% class="box" %)
	177	(((
19.17	178	Step1: Download the SQLit3 installation package
2.5	179	sudo wget [[https:~~/~~/www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz>>url:https://www.sqlite.org/2021/sqlite-autoconf-3350400.tar.gz]]
19.17	180
	181	Step2: tar the SQLit3 installation package
1.2	182	sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
19.17	183
	184	Step3: Generate the makefile
1.2	185	cd sqlite-autoconf-3350300/;./configure
19.17	186
	187	Step4: Compile makefile
1.2	188	sudo make
19.17	189
	190	Step5: Install makefile
1.2	191	sudo make install
19.17	192
	193	Check:
2.5	194	cd /usr/local/bin;ls -al ~-~-> Check to see if there is a file for sqlite3
	195	cd sqlite-autoconf-3350300/;./sqlite3 test.db ~-~-> Test whether the sqlite3 was installed successfully
19.17	196
	197	debug:
1.2	198	If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
	199	Please execute the command /sbin/ldconfig.
	200	After that execute the command ./sqlite3 test.db again.
2.5	201	)))
1.2	202
2.5	203
1.2	204
19.17	205	===== (% style="color:blue" %)Step 2 : Install and run the RSS service(%%) =====
1.2	206
19.17	207
	208	1): intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
	209
1.2	210	user must enter the root account and run the following commands
	211
2.5	212	(% class="box" %)
	213	(((
2.13	214	$ ./create_sqlite3_db.sh
	215	$ ./rssh_serv -p 3721 2>&1 &
	216	$ ps -ef \| grep rssh_serv check 3721 port
2.5	217	)))
1.2	218
10.2	219	[[image:image-20220527110436-6.png]]
1.2	220
	221	intall database and server development port
	222
19.17	223
1.2	224	Debug:
	225
2.5	226	(% class="box" %)
	227	(((
9.2	228	Check /var/rsshdb.sqlite3 ~-~->(% style="color:#4f81bd" %) ls /var/rsshdb.sqlite3(%%)
	229	Check ls /var/rsshdb.sqlite3 ~-~-> (% style="color:#4f81bd" %)sudo chmod 777 rssh_serv
2.5	230	)))
1.2	231
2.5	232	(% class="box" %)
	233	(((
2.15	234	if fail to open dpvlry or to bind to it
9.2	235	please kill rssh_serv,and run (% style="color:#4f81bd" %) ./rssh_serv -p 3721 2>&1 & (%%) again
2.5	236	)))
1.2	237
2.5	238
1.2	239
19.17	240	===== (% style="color:blue" %)Step 3 : Create a minimal SSH user (reverse SSH proxy for the gateway)(%%) =====
	241
	242
9.2	243	1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%) (custom user name)
1.2	244
9.2	245	2): (% style="color:#4f81bd" %)sudo passwd xxxxxx
1.2	246
9.2	247	3): (% style="color:#4f81bd" %)cp /bin/bash /bin/rbash
1.2	248
9.2	249	4): (% style="color:#4f81bd" %)sudo nano /etc/passwd(%%) ~-~-> Change /bin/bash to /bin/rbash
1.2	250
9.2	251	5): (% style="color:#4f81bd" %)sudo nano /home/xxxxx/.bashrc(%%) empty it,and input export PATH=$HOME/bin
1.2	252
9.2	253	6): (% style="color:#4f81bd" %)sudo nano /home/xxxxx/.bash_profile(%%) empty it,and input export PATH=$HOME/bin
1.2	254
	255
19.17	256	(% style="color:red" %)Now user "XXXXX" is the user with limited permissions of the current system
2.5	257
1.2	258
	259
19.17	260	=== 2.2.2 How does user get the gateway to connect to a user's private server ===
1.2	261
19.17	262
	263	===== (% style="color:blue" %)Step 1 : Come bace the gateway web UI for get the gateway Public key(%%) =====
	264
	265
	266	1) in the system ~-~-> (% style="color:#4f81bd" %)Remote Mgmt
	267
12.2	268	[[image:image-20220527110531-7.png]]
1.2	269
	270	Remote Mgmt
	271
2.6	272
1.2	273
19.17	274	===== (% style="color:blue" %)Step 2 : Authorization server(%%) =====
	275
	276
1.2	277	copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
	278
12.2	279	[[image:image-20220527110625-8.png]]
1.2	280
	281	Publickey
	282
2.6	283
1.2	284
19.17	285	===== (% style="color:blue" %)Step 3 : connecte private server(%%) =====
	286
	287
1.2	288	in the gateway web UI
	289
13.2	290	[[image:image-20220527110700-9.png]]
1.2	291
	292	gateway web UI
	293
19.17	294
2.6	295	(% class="box" %)
	296	(((
19.17	297	(% style="color:#4f81bd" %)Connection Type (%%) : If user's least privileged user with private server uses a password, select (% style="color:#4f81bd" %)Public Key(%%)
	298	(% style="color:red" %)Note: if user's least privileged user no uses a password,choose from both is fine(%%)
	299	(% style="color:#4f81bd" %)Login ID(%%) : Input user name "eg : "XXXXX"
	300	(% style="color:#4f81bd" %)Host Address(%%) : Input user's private server address
	301	(% style="color:#4f81bd" %)Connect at Startupt(%%): Choose to enable connect once device is powered.
1.2	302	Click Save and then Connect
2.6	303	)))
1.2	304
2.7	305
1.2	306
19.17	307	===== (% style="color:blue" %)Step 4 : Cheak is fine(%%) =====
	308
	309
1.2	310	Rssh Host connection Ok
	311
15.2	312	[[image:image-20220527111009-10.png]]
1.2	313
	314	Rssh Host connection Ok
	315
2.7	316
1.2	317	user can use common ps \| grep ssh to check it in the gateway.
	318
15.2	319	[[image:image-20220527111041-11.png]]
1.2	320
	321	Check the gateway
	322
	323
	324
19.17	325	===== (% style="color:blue" %)Step 5 : Create an authorization key file(%%) =====
1.2	326
19.17	327
	328	1): sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
	329
1.2	330	Debug:
	331
2.7	332	(% class="box" %)
	333	(((
19.17	334	~ check: sudo ls /home/xxxxx/.ssh/authorizedkey
2.7	335	)))
1.2	336
	337
19.17	338	=== 2.2.3 How to Ser up a Reverse SSH access ===
1.2	339
	340
19.17	341	==== (% style="color:blue" %)Step 1 : Log into the server system(%%) ====
	342
	343
17.2	344	[[image:image-20220527111145-12.png]]
	345
1.2	346	Loging server
	347
2.8	348
1.2	349
19.17	350	==== (% style="color:blue" %)Step 2 : access the gateway(%%) ====
	351
	352
18.2	353	(% class="box" %)
	354	(((
19.17	355	$ cd rssh-server/
18.2	356	)))
1.2	357
	358	Check the gateway linking to the server $ ./connect-gw.sh -l
	359
17.2	360	[[image:image-20220527111219-13.png]]
1.2	361
	362	Check the gateway linking to the server
	363
	364
19.17	365
1.2	366	access the gateway $ ./connect-gw.sh <GWID>
	367
18.2	368	[[image:image-20220527111300-14.png]]
1.2	369
	370	reverse ssh access the gateway
19.17	371
	372

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