SSH

SSH Key Generation

$ mkdir ~/.ssh
$ cd ~/.ssh
$ ssh-keygen -t rsa
Enter file: ubuntu@sinpro-dev
Enter passphrase: ********

ssh -i ~/.ssh/ubuntu@sinpro-dev ubuntu@153.127.***.***

Using the SSH Config File

Create a new SSH client configuration: ~/.ssh/config

Host sinpro-dev
	HostName 153.127.***.***
	Port ****
	IdentityFile ~/.ssh/dev@sinpro-dev
	User dev

You can connect with the following command:

ssh sinpro-dev

Port changing

Packet Filtering

Set up a packet filter so you can connect to the destination port.

Installing netstat on Ubuntu

# sudo apt update && sudo apt upgrade
# sudo apt install net-tools

More Info >

Run the netstat

The SSH server on Ubuntu listen on TCP port 22 by default. You can run the netstat command to check ssh port currently running on:

# sudo netstat -tulnp | grep ssh

Configurations

Open the file:

# sudo micro /etc/ssh/sshd_config

Edit the file:

Port XXXX

Restart the SSH server

# sudo systemctl restart ssh

Confirm that the port has been changed

# sudo netstat -tulnp | grep ssh

VSCode configuration

Install Remote - SSH VSCode Extension.

This extension allows you to use VSCode by connecting via SSH.