Install Dropbear And Change Dropbear Port On Ubuntu

Make sure that your Ubuntu is up to date

sudo apt-get update && sudo apt-get upgrade -y

To install Dropbear, run this on terminal

sudo apt-get install dropbear

 To start and change dropbear port, make sure nano was installed and do this

• Open dropbear configuration with "sudo nano /etc/default/dropbear"
• Change "NO_START=1" to "NO_START=0"
• On "DROPBEAR_PORT=22", change 22 to your desired port.
• Save your changed configuration with Ctrl + o
• Exit nano with Ctrl + x
• Run your dropbear with "/etc/init.d/dropbear start"

if you want to add multiple port, for example you want to add port 443 and 143, do this

• Open dropbear configuration with "nano /etc/default/dropbear"
• Change "DROPBEAR_EXTRA_ARGS=" to DROPBEAR_EXTRA_ARGS="-p 443 -p 143"
• Save and exit nano