How to Deny Specific IP

Prerequisites

• UFW installed and enabled
• Root/sudo access

Step 1: Deny IP Address

sudo ufw deny from 203.0.113.45

Step 2: Deny IP to Specific Port

sudo ufw deny from 203.0.113.45 to any port 22

Step 3: Delete Existing Rule

sudo ufw status numbered
sudo ufw delete [number]

Step 4: Reload UFW

sudo ufw reload