Firewall Rule Generator - Free Online IT Tool

🧱 Firewall Rule Generator

Quickly generate UFW or IPTables rules for common ports.

Action

Port

Protocol

Source IP (or ANY)

ℹ️ About Firewall Rule Generator

The Firewall Rule Generator is a security utility that simplifies the process of hardening Linux servers. Managing firewalls via the command line (CLI) requires specific syntax that varies significantly between tools like UFW (Uncomplicated Firewall) and the lower-level IPTables.

This tool allows you to define a security policy—such as allowing web traffic on port 80 or blocking a specific malicious IP—and instantly generates the exact commands needed for both major firewall systems. It's an essential resource for sysadmins securing new servers, developers configuring application ports, and security teams auditing host-based access controls.

📖 How to use Firewall Rule Generator

1. Select whether you want to 'Allow' or 'Deny' traffic.
2. Enter the port number (e.g., <code>22</code> for SSH, <code>443</code> for HTTPS).
3. Choose the protocol (TCP is most common for web services).
4. Enter a specific Source IP address if you want to restrict access to a single host, or leave as 'ANY'.
5. Click 'Run Tool' and copy the generated command into your server's terminal.

❓ Frequently Asked Questions

What is the difference between UFW and IPTables?

UFW is a user-friendly frontend for IPTables. It's standard on Ubuntu/Debian. IPTables is the underlying framework and is available on almost all Linux distributions.

Do these rules persist after a reboot?

For UFW, yes. For IPTables, you usually need to install a package like <code>iptables-persistent</code> to save the rules.

Can I block a whole country?

This tool is designed for individual IPs or CIDR ranges. For country-level blocking, we recommend using a Web Application Firewall (WAF) or Geo-IP based firewall modules.