“Remote development” VSCode uses SSH remote linux server – public network remote connection

Article directory

foreword
video tutorial
1. Install OpenSSH
2. vscode configures ssh
3. LAN test to connect to remote server
4. Remote connection via public network
- 4.1 ubuntu installation cpolar intranet penetration
- 4.2 Create a tunnel map
- 4.3 Test public network remote connection
5. Configure a fixed TCP port address
- 5.1 Reserve a fixed TCP port address
- 5.2 Configure fixed TCP port address
- 5.3 Test fixed public network address remote

Forwarded from cpolar intranet penetration article: [Vscode Remote Development] Use SSH to remotely connect to the server “Intranet penetration”

Foreword

There are many remote connection server tools, such as XShell, putty, etc., you can remotely connect to the server through ssh, but this is not convenient for writing code, you may need to write the code locally and then transfer the source code to the server to run and run on the server The pictures of can’t be viewed directly…

And vscode can solve these problems very well. Its core components are all running in a remote environment. The local development machine does not need to have the source code of the remote development environment at all. Writing code on vscode can be directly updated to the server synchronously. You bring a silky-smooth remote development experience.

So in this article tutorial, we will realize remote development through vscode, and do intranet penetration to realize remote connection in the public network environment. You can also remotely connect to the server anywhere outside to develop and write code.

Video tutorial

[VS Code remote development] The public network uses SSH to remotely connect to the server to develop and write code

1. Install OpenSSH

Open the Windows start page, directly search for PowerShell, open the first Windows PowerShell, click to run as an administrator

After opening, enter the following command:

Get-WindowsCapability -Online | ? Name -like 'OpenSSH*'

The result at this time is that OpenSSH is not installed in the computer:

If OpenSSH is already installed, skip this step, if not, enter the following command

Add-WindowsCapability -Online -Name OpenSSH.Client~~~~0.0.1.0

The final result is as follows, which means that the OpenSSH installation is successful:

After the successful installation of OpenSSH is displayed, enter the command ssh after opening the local cmd and entering

ssh

If the result is displayed like this, then it is correct:

2. vscode configuration ssh

Install vscode on windows, and open it after successful installation.

Click the extension in the left toolbar, search for “ssh”, and select the first Remote - SSH to install (I have already installed it, and all the displays are disabled at this time)

Click the “Settings” button in the lower left corner, followed by “Settings”

According to the prompt in the screenshot, find Show Login Terminal and check this option

Click the Remote button in the left toolbar to view the remote connection, and click the button next to the server displayed under SSH TARGETS to connect

3. LAN test to connect to remote server

Take ssh connection to ubuntu as an example, after opening vscode, first try to use the LAN address ssh remote ubuntu

Enter the command into the dialog box and press Enter

ssh username@ip

choose a profile

After the input is completed, the ssh connection just added will be displayed on the right, click the –> icon to connect, and enter the password when it appears, just enter the password

A green sign appears to indicate a successful connection

4. Public network remote connection

At present, we can only perform remote control within the local area network, which has certain limitations. However, we use intranet penetration to achieve remote connections in the public network environment. Here we use the tool cpolar intranet penetration to achieve it, no need for public network IP, no need to set up routers, and the operation is simple.

cpolar official website: https://www.cpolar.com/

4.1 ubuntu install cpolar intranet penetration

In this tutorial, we use the ubuntu graphical system. We need to install and configure cpolar intranet penetration on ubuntu first, which supports one-click automatic installation scripts.

Domestic installation

curl -L https://www.cpolar.com/static/downloads/install-release-cpolar.sh | sudo bash

Or cpolar short link installation method: (for foreign use)

curl -sL https://git.io/cpolar | sudo bash

Check the version number, if it is displayed normally, the installation is successful

cpolar version

token authentication

Log in to the background of the cpolar official website, click the verification on the left to view your authentication token, and then paste the token in the command line

cpolar authtoken xxxxxxx

Simple Penetration Test

cpolar http 8080

If the corresponding public network address is generated normally, press ctrl + c to exit

Add a service to the system

sudo systemctl enable cpolar

Start the cpolar service

sudo systemctl start cpolar

Check the service status, as shown in the figure below, if active is started

sudo systemctl status cpolar

After the installation and configuration of cpolar is complete, visit the local port 9200 on the browser, and use the cpolar email account to log in to the cpolar web UI management interface

After cpolar is successfully installed, 2 sample tunnels will be installed by default, which can be edited or deleted by yourself:

ssh tunnel: point to local port 22, TCP protocol
website tunnel: point to local port 8080, HTTP protocol

4.2 Create a tunnel map

We can directly use the sample tunnel ssh, or re-create a tunnel, using the tcp protocol, pointing to port 22. Click Tunnel Management on the left dashboard – Create Tunnel

Tunnel name: customizable, be careful not to repeat
protocol: tcp
Local address: 22
Port Type: Random ephemeral TCP port
Region: China VIP

Click Create

After the tunnel is successfully created, click on the status on the left – online tunnel list, you can see that the tunnel just created has generated a corresponding public network address, copy it

4.3 Test public network remote connection

Open vscode on windows, and use the copied public network address to remote SSH.

Click the button next to the server displayed under SSH TARGETS to connect

If the added connection does not appear on the left, click the button below to refresh

Then click the small arrow –> connect, select ssh type, select linux

Enter the parameters and password to succeed remotely, which is convenient and quick.

The following information appears to indicate that the remote connection is successful

5. Configure a fixed TCP port address

Since the tunnel created above selects a random temporary TCP port, the generated public network address will change randomly within 24 hours, which is inconvenient for users who need long-term remote access. However, we can configure a fixed address for remote connection, and the subsequent remote does not need to check the random public network address before remote.

Note: The function of configuring a fixed TCP port address needs to be upgraded to the professional version package or above to support it.

5.1 Reserve a fixed TCP port address

Open the cpolar official website, log in to the official website background https://dashboard.cpolar.com/reserved, click the reservation on the left, let’s reserve a fixed TCP port address:

Region: select China
Description: It is a note, which can be customized

After the address is successfully reserved, the system will generate a corresponding fixed public network address and copy it down

5.2 Configure fixed TCP port address

Open a browser on the ubuntu system to access the local port 9200, and log in to the cpolar web UI management interface. Click Tunnel Management on the left – Tunnel List, find the ssh tunnel, click Edit on the right, let’s modify the tunnel information, and configure the fixed tcp port address into the tunnel

Modify the tunnel information and configure the successfully reserved fixed tcp address into the tunnel

Port type: modified to fixed tcp port
Reserved tcp address: fill in the successfully reserved address

click update

After the tunnel is successfully updated, click the status on the left dashboard – the list of online tunnels, find the SSH tunnel, and you can see that the public network address has been updated to a fixed tcp address.