Wiki source code of Remote Access Gateway

Version 19.18 by Xiaoling on 2022/07/14 14:22

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
19.17	40	== 2.1 For Firmware Version lower than lgw~-~-build-v5.4.1616478814-20210323-1355 ==
19.13	41
19.15	42
19.17	43	=== 2.1.1 End User Guide to use SSH access ===
1.2	44
19.16	45
1.2	46	Go to this the Reverse SSH page as below:
	47
3.2	48	[[image:image-20220527102348-1.png]]
1.2	49
	50	Get the RSSH configure page
	51
	52
4.2	53	[[image:image-20220527103251-2.png]]
1.2	54
	55	Connection OK.
	56
19.16	57	* (% style="color:#4f81bd" %)Login ID(%%): Input (% style="color:#4f81bd" %)sshuser
	58	* (% style="color:#4f81bd" %)Host Address(%%): Input (% style="color:#4f81bd" %)support.dragino.com(%%)
	59	* (% style="color:#4f81bd" %)Host Port(%%): Please email to support @ dragino.com to get a valid host port.
4.3	60	* (% style="color:#4f81bd" %)Connect at Startupt(%%): Choose to enable connect once device is powered.
19.17	61	* (% 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	62
2.2	63	(((
1.2	64	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	65	)))
1.2	66
	67
	68
19.17	69	=== 2.1.2 How to Ser up a Reverse SSH access ===
	70
	71
1.2	72	Advance administrator can config a SSH server to provide support their end user themselves. Instruction is as below:
	73
	74	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	75	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	76	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.
	77	1. Give a free port to the user and ask them to configure RSSH page in the gateway.
	78	1. In your server or other machine, you will able to access to the end user device by below command:
	79
2.5	80	(% class="box" %)
	81	(((
2.10	82	$ ssh -p <End User Host Port> root@<Host Address>
2.5	83	)))
1.2	84
2.5	85	(((
4.4	86	(% 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	87	)))
1.2	88
2.3	89
1.2	90
19.17	91	==== 2.1.2.1 Note for set up RSSH server ====
	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
19.17	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
19.17	121	=== 2.2.1 End User Guide to use SSH access ===
1.2	122
	123
19.17	124	==== 2.2.1.1 Install the SSH service for server ====
1.2	125
	126
19.17	127	===== (% style="color:blue" %)Step 1 : Download the SSH service code(%%) =====
	128
	129
	130	1). git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
	131
6.2	132	[[image:image-20220527105447-1.png]]
1.2	133
	134	git clone rssh-server
	135
2.5	136
19.17	137	2). cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
1.2	138
6.2	139	[[image:image-20220527105511-2.png]]
1.2	140
	141	Generate the execute file
	142
6.2	143
1.2	144	Debug :
	145
2.5	146	(% class="box" %)
	147	(((
6.3	148	if you git fail. ~-~-> (% style="color:#4f81bd" %)sudo: git: command not found.(%%)
	149	please install git. ~-~-> (% style="color:#4f81bd" %)yum install git -y or apt-get install git -y.
2.5	150	)))
1.2	151
2.5	152	(% class="box" %)
	153	(((
6.3	154	if you make error 127,it (% style="color:#4f81bd" %)lack of gcc.(%%)
	155	please install gcc. ~-~->(% style="color:#4f81bd" %)yum install gcc.
2.5	156	)))
1.2	157
8.2	158	[[image:image-20220527105856-3.png]]
1.2	159
	160	lack of gcc
	161
2.5	162	(% class="box" %)
	163	(((
6.3	164	if you make a fatal error : sqlite3.h,it (% style="color:#4f81bd" %)lack of sqlite3.(%%)
	165	please insatell (% style="color:#4f81bd" %)sqlite3.
2.5	166	)))
1.2	167
8.2	168	[[image:image-20220527105918-4.png]]
1.2	169
	170	lack of sqlite3
	171
8.2	172
19.17	173	(% style="color:blue" %)How to install Sqlit3:
1.2	174
2.5	175	(% class="box" %)
	176	(((
19.18	177	(% style="color:#037691" %)Step1:(%%) Download the SQLit3 installation package
2.5	178	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	179
19.18	180	(% style="color:#037691" %)Step2:(%%) tar the SQLit3 installation package
1.2	181	sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
19.17	182
19.18	183	(% style="color:#037691" %)Step3:(%%) Generate the makefile
1.2	184	cd sqlite-autoconf-3350300/;./configure
19.17	185
19.18	186	(% style="color:#037691" %)Step4:(%%) Compile makefile
1.2	187	sudo make
19.17	188
19.18	189	(% style="color:#037691" %)Step5: (%%)Install makefile
1.2	190	sudo make install
19.17	191
19.18	192	(% style="color:#037691" %)Check:(%%)
	193	cd /usr/local/bin;ls -al ~-~-> Check to see if there is a file for sqlite3
	194	cd sqlite-autoconf-3350300/;./sqlite3 test.db ~-~-> Test whether the sqlite3 was installed successfully
19.17	195
19.18	196	(% style="color:#037691" %)debug:(%%)
1.2	197	If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
	198	Please execute the command /sbin/ldconfig.
	199	After that execute the command ./sqlite3 test.db again.
2.5	200	)))
1.2	201
2.5	202
1.2	203
19.17	204	===== (% style="color:blue" %)Step 2 : Install and run the RSS service(%%) =====
1.2	205
19.17	206
	207	1): intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
	208
1.2	209	user must enter the root account and run the following commands
	210
2.5	211	(% class="box" %)
	212	(((
19.18	213	**~ $ ./create_sqlite3_db.sh
2.13	214	$ ./rssh_serv -p 3721 2>&1 &
19.18	215	$ ps -ef \| grep rssh_serv check 3721 port**
2.5	216	)))
1.2	217
10.2	218	[[image:image-20220527110436-6.png]]
1.2	219
	220	intall database and server development port
	221
19.17	222
1.2	223	Debug:
	224
2.5	225	(% class="box" %)
	226	(((
19.18	227	Check /var/rsshdb.sqlite3 ~-~->(% style="color:#4f81bd" %) ls /var/rsshdb.sqlite3(%%)
	228	Check ls /var/rsshdb.sqlite3 ~-~-> (% style="color:#4f81bd" %)sudo chmod 777 rssh_serv
2.5	229	)))
1.2	230
2.5	231	(% class="box" %)
	232	(((
2.15	233	if fail to open dpvlry or to bind to it
9.2	234	please kill rssh_serv,and run (% style="color:#4f81bd" %) ./rssh_serv -p 3721 2>&1 & (%%) again
2.5	235	)))
1.2	236
2.5	237
1.2	238
19.17	239	===== (% style="color:blue" %)Step 3 : Create a minimal SSH user (reverse SSH proxy for the gateway)(%%) =====
	240
	241
9.2	242	1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%) (custom user name)
1.2	243
9.2	244	2): (% style="color:#4f81bd" %)sudo passwd xxxxxx
1.2	245
9.2	246	3): (% style="color:#4f81bd" %)cp /bin/bash /bin/rbash
1.2	247
19.18	248	4): (% style="color:#4f81bd" %)sudo nano /etc/passwd(%%) ~-~-> Change /bin/bash to /bin/rbash
1.2	249
9.2	250	5): (% style="color:#4f81bd" %)sudo nano /home/xxxxx/.bashrc(%%) empty it,and input export PATH=$HOME/bin
1.2	251
9.2	252	6): (% style="color:#4f81bd" %)sudo nano /home/xxxxx/.bash_profile(%%) empty it,and input export PATH=$HOME/bin
1.2	253
	254
19.17	255	(% style="color:red" %)Now user "XXXXX" is the user with limited permissions of the current system
2.5	256
1.2	257
	258
19.17	259	=== 2.2.2 How does user get the gateway to connect to a user's private server ===
1.2	260
19.17	261
	262	===== (% style="color:blue" %)Step 1 : Come bace the gateway web UI for get the gateway Public key(%%) =====
	263
	264
	265	1) in the system ~-~-> (% style="color:#4f81bd" %)Remote Mgmt
	266
12.2	267	[[image:image-20220527110531-7.png]]
1.2	268
	269	Remote Mgmt
	270
2.6	271
1.2	272
19.17	273	===== (% style="color:blue" %)Step 2 : Authorization server(%%) =====
	274
	275
1.2	276	copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
	277
12.2	278	[[image:image-20220527110625-8.png]]
1.2	279
	280	Publickey
	281
2.6	282
1.2	283
19.17	284	===== (% style="color:blue" %)Step 3 : connecte private server(%%) =====
	285
	286
1.2	287	in the gateway web UI
	288
13.2	289	[[image:image-20220527110700-9.png]]
1.2	290
	291	gateway web UI
	292
19.17	293
2.6	294	(% class="box" %)
	295	(((
19.17	296	(% style="color:#4f81bd" %)Connection Type (%%) : If user's least privileged user with private server uses a password, select (% style="color:#4f81bd" %)Public Key(%%)
	297	(% style="color:red" %)Note: if user's least privileged user no uses a password,choose from both is fine(%%)
	298	(% style="color:#4f81bd" %)Login ID(%%) : Input user name "eg : "XXXXX"
	299	(% style="color:#4f81bd" %)Host Address(%%) : Input user's private server address
	300	(% style="color:#4f81bd" %)Connect at Startupt(%%): Choose to enable connect once device is powered.
1.2	301	Click Save and then Connect
2.6	302	)))
1.2	303
2.7	304
1.2	305
19.17	306	===== (% style="color:blue" %)Step 4 : Cheak is fine(%%) =====
	307
	308
1.2	309	Rssh Host connection Ok
	310
15.2	311	[[image:image-20220527111009-10.png]]
1.2	312
	313	Rssh Host connection Ok
	314
2.7	315
1.2	316	user can use common ps \| grep ssh to check it in the gateway.
	317
15.2	318	[[image:image-20220527111041-11.png]]
1.2	319
	320	Check the gateway
	321
	322
	323
19.17	324	===== (% style="color:blue" %)Step 5 : Create an authorization key file(%%) =====
1.2	325
19.17	326
	327	1): sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
	328
1.2	329	Debug:
	330
2.7	331	(% class="box" %)
	332	(((
19.17	333	~ check: sudo ls /home/xxxxx/.ssh/authorizedkey
2.7	334	)))
1.2	335
	336
19.17	337	=== 2.2.3 How to Ser up a Reverse SSH access ===
1.2	338
	339
19.17	340	==== (% style="color:blue" %)Step 1 : Log into the server system(%%) ====
	341
	342
17.2	343	[[image:image-20220527111145-12.png]]
	344
1.2	345	Loging server
	346
2.8	347
1.2	348
19.17	349	==== (% style="color:blue" %)Step 2 : access the gateway(%%) ====
	350
	351
18.2	352	(% class="box" %)
	353	(((
19.17	354	$ cd rssh-server/
18.2	355	)))
1.2	356
	357	Check the gateway linking to the server $ ./connect-gw.sh -l
	358
17.2	359	[[image:image-20220527111219-13.png]]
1.2	360
	361	Check the gateway linking to the server
	362
	363
19.17	364
1.2	365	access the gateway $ ./connect-gw.sh <GWID>
	366
18.2	367	[[image:image-20220527111300-14.png]]
1.2	368
	369	reverse ssh access the gateway
19.17	370
	371

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