Wiki source code of Remote Access Gateway

Version 22.1 by Kilight Cao on 2022/07/25 10:38

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
22.1	10	Remote.it for remote access is available in the latest Dragino firmware for gateway. For security concerns, the remote.it only available base on end-user demand.
1.1	11
2.15	12	(% style="color:red" %)Important Notice:
1.1	13
22.1	14	* 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.
	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
	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
19.20	27	* (% style="color:red" %)RSSH access will give full control of your device to remote support. Please remove sensitivity info before perform this
	28	* (% style="color:red" %)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
19.21	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	(((
19.21	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
20.2	92	==== (% style="color:blue" %)Note for set up RSSH server(%%) ====
19.17	93
20.2	94
2.9	95	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	96
2.4	97	(% class="box" %)
	98	(((
19.21	99	**[root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102 ~-~-> check the port 9102 process status (change 9102 to the actually port for your gateway.
2.4	100	COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
	101	sshd 21430 sshuser 15u IPv4 47567059 0t0 TCP localhost:bacula-fd (LISTEN)
	102	[root@iZt4n22vqvm7ajogrfiif6Z ~~]# kill 21430 ~-~-> Kill PID of this process.
	103	[root@iZt4n22vqvm7ajogrfiif6Z ~~]# lsof -i :9102
19.21	104	[root@iZt4n22vqvm7ajogrfiif6Z ~~]#**
2.4	105	)))
1.2	106
2.11	107
20.2	108
19.17	109	== 2.2 For Firmware Version higher than lgw~-~-build-v5.4.1618196981-20210412-1111 ==
1.2	110
19.21	111
1.2	112	Below gateway support reverse SSH access:
	113
2.5	114	(% class="box" %)
	115	(((
19.21	116	**Firmware Version >lgw~-~-build-v5.4.1618196981-20210412-1111 Firmware Download
2.11	117	LG01N, OLG01N (Note: LG01-P LG01-S doesn't support)
	118	LG02, OLG02
	119	LG308, DLOS8
	120	LPS8
19.21	121	LIG16**
2.5	122	)))
1.2	123
2.11	124
19.21	125
19.17	126	=== 2.2.1 End User Guide to use SSH access ===
1.2	127
	128
19.17	129	==== 2.2.1.1 Install the SSH service for server ====
1.2	130
	131
19.17	132	===== (% style="color:blue" %)Step 1 : Download the SSH service code(%%) =====
	133
	134
	135	1). git clone [[https:~~/~~/github.com/dragino/rssh-server.git>>url:https://github.com/dragino/rssh-server.git]] rssh-server
	136
6.2	137	[[image:image-20220527105447-1.png]]
1.2	138
	139	git clone rssh-server
	140
2.5	141
19.17	142	2). cd rssh-server; sudo make ~-~--> to Generate the execute file：rssh_serv
1.2	143
6.2	144	[[image:image-20220527105511-2.png]]
1.2	145
	146	Generate the execute file
	147
6.2	148
1.2	149	Debug :
	150
2.5	151	(% class="box" %)
	152	(((
19.21	153	if you git fail. ~-~-> (% style="color:#4f81bd" %)sudo: git: command not found.(%%)
	154	please install git. ~-~-> (% style="color:#4f81bd" %)yum install git -y or apt-get install git -y.
2.5	155	)))
1.2	156
2.5	157	(% class="box" %)
	158	(((
19.21	159	if you make error 127,it (% style="color:#4f81bd" %)lack of gcc.(%%)
	160	please install gcc. ~-~-> (% style="color:#4f81bd" %)yum install gcc.(%%)
2.5	161	)))
1.2	162
8.2	163	[[image:image-20220527105856-3.png]]
1.2	164
	165	lack of gcc
	166
19.21	167
2.5	168	(% class="box" %)
	169	(((
19.21	170	if you make a fatal error : sqlite3.h,it (% style="color:#4f81bd" %)lack of sqlite3.(%%)
	171	please insatell (% style="color:#4f81bd" %)sqlite3(%%)(% style="color:#4f81bd" %).
2.5	172	)))
1.2	173
8.2	174	[[image:image-20220527105918-4.png]]
1.2	175
	176	lack of sqlite3
	177
8.2	178
19.17	179	(% style="color:blue" %)How to install Sqlit3:
1.2	180
2.5	181	(% class="box" %)
	182	(((
19.18	183	(% style="color:#037691" %)Step1:(%%) Download the SQLit3 installation package
2.5	184	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	185
19.18	186	(% style="color:#037691" %)Step2:(%%) tar the SQLit3 installation package
1.2	187	sudo tar -zxvf sqlite-autoconf-3350300.tar.gz
19.17	188
19.18	189	(% style="color:#037691" %)Step3:(%%) Generate the makefile
1.2	190	cd sqlite-autoconf-3350300/;./configure
19.17	191
19.18	192	(% style="color:#037691" %)Step4:(%%) Compile makefile
1.2	193	sudo make
19.17	194
19.18	195	(% style="color:#037691" %)Step5: (%%)Install makefile
1.2	196	sudo make install
19.17	197
19.18	198	(% style="color:#037691" %)Check:(%%)
	199	cd /usr/local/bin;ls -al ~-~-> Check to see if there is a file for sqlite3
	200	cd sqlite-autoconf-3350300/;./sqlite3 test.db ~-~-> Test whether the sqlite3 was installed successfully
19.17	201
19.18	202	(% style="color:#037691" %)debug:(%%)
1.2	203	If you get the imformation that is SQLite header and source version mismatch, when you execute./sqlite3 test.db.
	204	Please execute the command /sbin/ldconfig.
	205	After that execute the command ./sqlite3 test.db again.
2.5	206	)))
1.2	207
2.5	208
1.2	209
19.17	210	===== (% style="color:blue" %)Step 2 : Install and run the RSS service(%%) =====
1.2	211
19.17	212
	213	1): intall database for /var/rsshdb.sqlite3 and Server development port for 3721(The default is 3721)
	214
1.2	215	user must enter the root account and run the following commands
	216
2.5	217	(% class="box" %)
	218	(((
19.18	219	**~ $ ./create_sqlite3_db.sh
2.13	220	$ ./rssh_serv -p 3721 2>&1 &
19.18	221	$ ps -ef \| grep rssh_serv check 3721 port**
2.5	222	)))
1.2	223
10.2	224	[[image:image-20220527110436-6.png]]
1.2	225
	226	intall database and server development port
	227
19.17	228
1.2	229	Debug:
	230
2.5	231	(% class="box" %)
	232	(((
19.18	233	Check /var/rsshdb.sqlite3 ~-~->(% style="color:#4f81bd" %) ls /var/rsshdb.sqlite3(%%)
	234	Check ls /var/rsshdb.sqlite3 ~-~-> (% style="color:#4f81bd" %)sudo chmod 777 rssh_serv
2.5	235	)))
1.2	236
2.5	237	(% class="box" %)
	238	(((
19.22	239	if fail to open dpvlry or to bind to it
	240	please kill rssh_serv,and run (% style="color:#4f81bd" %) ./rssh_serv -p 3721 2>&1 &(%%)(% style="color:#4f81bd" %) (%%) again
2.5	241	)))
1.2	242
2.5	243
1.2	244
19.17	245	===== (% style="color:blue" %)Step 3 : Create a minimal SSH user (reverse SSH proxy for the gateway)(%%) =====
	246
	247
19.22	248	1): (% style="color:#4f81bd" %)sudo useradd XXXXX(%%) (custom user name)
1.2	249
9.2	250	2): (% style="color:#4f81bd" %)sudo passwd xxxxxx
1.2	251
9.2	252	3): (% style="color:#4f81bd" %)cp /bin/bash /bin/rbash
1.2	253
19.22	254	4): (% style="color:#4f81bd" %)sudo nano /etc/passwd(%%) ~-~-> Change /bin/bash to /bin/rbash
1.2	255
9.2	256	5): (% style="color:#4f81bd" %)sudo nano /home/xxxxx/.bashrc(%%) empty it,and input export PATH=$HOME/bin
1.2	257
9.2	258	6): (% style="color:#4f81bd" %)sudo nano /home/xxxxx/.bash_profile(%%) empty it,and input export PATH=$HOME/bin
1.2	259
	260
19.17	261	(% style="color:red" %)Now user "XXXXX" is the user with limited permissions of the current system
2.5	262
1.2	263
	264
19.17	265	=== 2.2.2 How does user get the gateway to connect to a user's private server ===
1.2	266
19.17	267
	268	===== (% style="color:blue" %)Step 1 : Come bace the gateway web UI for get the gateway Public key(%%) =====
	269
	270
19.22	271	1) in the system ~-~-> (% style="color:#4f81bd" %)Remote Mgmt
19.17	272
12.2	273	[[image:image-20220527110531-7.png]]
1.2	274
	275	Remote Mgmt
	276
2.6	277
1.2	278
19.17	279	===== (% style="color:blue" %)Step 2 : Authorization server(%%) =====
	280
	281
1.2	282	copy the Gateway Publickey into user's private server "/home/XXXXX/.ssh/authorized_keys" file.
	283
12.2	284	[[image:image-20220527110625-8.png]]
1.2	285
	286	Publickey
	287
2.6	288
1.2	289
19.17	290	===== (% style="color:blue" %)Step 3 : connecte private server(%%) =====
	291
	292
1.2	293	in the gateway web UI
	294
13.2	295	[[image:image-20220527110700-9.png]]
1.2	296
	297	gateway web UI
	298
19.17	299
2.6	300	(% class="box" %)
	301	(((
19.22	302	(% style="color:#4f81bd" %)Connection Type (%%) : If user's least privileged user with private server uses a password, select (% style="color:#4f81bd" %)Public Key(%%)
19.17	303	(% style="color:red" %)Note: if user's least privileged user no uses a password,choose from both is fine(%%)
19.22	304	(% style="color:#4f81bd" %)Login ID(%%) : Input user name "eg : "XXXXX"
	305	(% style="color:#4f81bd" %)Host Address(%%) : Input user's private server address
	306	(% style="color:#4f81bd" %)Connect at Startupt (%%): Choose to enable connect once device is powered.
	307	Click Save and then Connect
2.6	308	)))
1.2	309
2.7	310
1.2	311
19.17	312	===== (% style="color:blue" %)Step 4 : Cheak is fine(%%) =====
	313
	314
1.2	315	Rssh Host connection Ok
	316
15.2	317	[[image:image-20220527111009-10.png]]
1.2	318
	319	Rssh Host connection Ok
	320
2.7	321
1.2	322	user can use common ps \| grep ssh to check it in the gateway.
	323
15.2	324	[[image:image-20220527111041-11.png]]
1.2	325
	326	Check the gateway
	327
	328
	329
19.17	330	===== (% style="color:blue" %)Step 5 : Create an authorization key file(%%) =====
1.2	331
19.17	332
19.23	333	1): sudo mkdir /home/xxxxx/.ssh; sudo touch /home/xxxxx/.ssh/authorizedkey
19.17	334
19.23	335
1.2	336	Debug:
	337
2.7	338	(% class="box" %)
	339	(((
19.17	340	~ check: sudo ls /home/xxxxx/.ssh/authorizedkey
2.7	341	)))
1.2	342
	343
19.23	344
19.17	345	=== 2.2.3 How to Ser up a Reverse SSH access ===
1.2	346
	347
19.17	348	==== (% style="color:blue" %)Step 1 : Log into the server system(%%) ====
	349
	350
17.2	351	[[image:image-20220527111145-12.png]]
	352
1.2	353	Loging server
	354
2.8	355
1.2	356
19.17	357	==== (% style="color:blue" %)Step 2 : access the gateway(%%) ====
	358
	359
18.2	360	(% class="box" %)
	361	(((
19.17	362	$ cd rssh-server/
18.2	363	)))
1.2	364
	365	Check the gateway linking to the server $ ./connect-gw.sh -l
	366
17.2	367	[[image:image-20220527111219-13.png]]
1.2	368
	369	Check the gateway linking to the server
	370
	371
19.17	372
1.2	373	access the gateway $ ./connect-gw.sh <GWID>
	374
18.2	375	[[image:image-20220527111300-14.png]]
1.2	376
	377	reverse ssh access the gateway
19.17	378
	379

Wiki source code of Remote Access Gateway

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