Change SSH Port on Ubuntu
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This guide shows you how to change the default SSH port on Ubuntu to a custom port (e.g., 2222) to improve server security against automated attacks.
Why Change the SSH Port?
Port 22 is the default SSH port and is commonly targeted by brute-force attacks. Changing the port reduces exposure and adds a layer of obscurity.
Steps to Change the SSH Port:
- Open the SSH configuration file:
sudo nano /etc/ssh/sshd_config - Find the line:
#Port 22
Uncomment it and change to a new port:Port 2222 - Allow the new port in the firewall:
sudo ufw allow 2222 - Restart the SSH service:
sudo systemctl restart ssh - Important: Do not close your current session before testing the new port. You may also keep port 22 temporarily open as a fallback.
Watch the full tutorial:
https://www.youtube.com/watch?v=BUlhrUgve8c
