IP Blacklisting: Blocking Malicious Subnets & Attack Sources (Tab 2: Deny IP)

Firewall Management • Tab 2: Deny IP • Native 1920x1080 View

📌 Purpose & Quick Summary

Use the Deny IP tab to instantly block specific IP addresses or CIDR subnets attacking your server with brute-force, web scrapers, or Layer-4 volumetric floods.

🛠️ Step-by-Step Instructions: Blacklisting an IP

1. Click the Deny IP tab.
2. In the Block IP Address field, enter the IP (e.g., 198.51.100.42 or CIDR 198.51.100.0/24).
3. Enter an optional reason (e.g., SSH Brute Force).
4. Click Block IP. All network packets from that address will be dropped at the kernel network interface.