A specialized skill for implementing secure firewall perimeters and best practices across cloud providers and operating systems using Openclaw Skills.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install firewall
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install firewall using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Firewall?
The Firewall skill for Openclaw Skills provides a comprehensive framework for securing server infrastructure and cloud environments. It emphasizes a defense-in-depth strategy, combining provider-level firewalls with local OS-level rules to create a robust security posture. By defaulting to a deny-all incoming traffic stance, this skill helps developers and sysadmins minimize their attack surface while ensuring essential services remain accessible.
Built to handle the nuances of modern networking, this Openclaw Skills resource covers critical aspects such as SSH safety, CIDR-based IP restriction, and the specific challenges posed by Docker's network bypassing. It serves as a technical guide for maintaining security parity between IPv4 and IPv6, ensuring that no entry point is left unmonitored.
Firewall Use Cases
- Securing production web servers by restricting traffic to essential HTTP and HTTPS ports.
- Protecting remote access by limiting SSH entry to specific, known IP addresses via CIDR notation.
- Managing security groups across cloud providers like AWS, DigitalOcean, and Hetzner for consistent rule application.
- Hardening containerized environments where Docker might otherwise bypass standard UFW or iptables rules.
- Setting up secure tunnels for database access instead of exposing ports like 3306 or 5432 to the public internet.
How Firewall Works
- Establish a secure secondary session to prevent accidental lockout before applying any new rules.
- Configure a default deny policy for all incoming traffic to establish a baseline security perimeter.
- Identify and explicitly permit necessary ports such as 22 for SSH, 80 for HTTP, and 443 for HTTPS.
- Apply rules at the cloud provider level to filter traffic before it even reaches the server instance.
- Layer OS-specific firewall configurations for defense in depth, ensuring both IPv4 and IPv6 protocols are covered.
- Test the configuration from an external network to verify that ports are closed or open as intended.
Firewall Setup
To begin using this firewall logic within your Openclaw Skills workflow, ensure you have administrative access to your server. Use the following steps to safely initialize your firewall:
# 1. Always allow SSH first to avoid lockout
sudo ufw allow 22/tcp
# 2. Enable the firewall
sudo ufw enable
# 3. Verify status and rules
sudo ufw status verbose
For cloud provider integration, access your provider's dashboard (e.g., AWS Security Groups) and mirror these rules for maximum protection.
Firewall Data Schema & Taxonomy
The Firewall skill organizes security metadata into clear taxonomies for better management across different environments.
| Component | Logic | Application |
|---|---|---|
| Inbound Policy | Default Deny | Blocks all unsolicited traffic |
| Outbound Policy | Default Allow | Permits system updates and outbound requests |
| Port Mapping | Protocol + Port | Explicitly defines 80/TCP, 443/TCP, 51820/UDP, etc. |
| IP Filtering | CIDR /32 or /24 | Restricts access to specific users or subnets |
| Protocol Support | IPv4 & IPv6 | Ensures dual-stack security parity |
Firewall Advanced Features
- Multi-layer defense strategy utilizing both provider-level and host-level filtering through Openclaw Skills.
- Docker-optimized configurations that prevent container port exposure from circumventing host firewalls.
- Stateful packet inspection logic that automatically manages outbound response traffic.
- Support for VPN integration (WireGuard/OpenVPN) to provide secure internal network access.
- Granular debugging workflows to distinguish between closed ports and silent drops.
SKILL.md
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