Wiki source code of Remote Access Gateway

Version 19.11 by Xiaoling on 2022/05/31 15:55

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

Wiki source code of Remote Access Gateway

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