Host Hardening Audit

Name: Host Hardening Audit
Price: 5 USD
Availability: InStock
Author: Agensi

Audit a server or workstation's security posture with read-only checks, then apply staged hardening. Use when a host needs an SSH, firewall, update, backup, and

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Works with the AI tools you already use

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See it in action

You say

I just spun up a new Ubuntu VPS on DigitalOcean. I need to make sure it's secure before I point my domain at it. Can you run a hardening audit?

Your agent does

Audit complete. Found 2 Critical issues: Root SSH password login is enabled, and MySQL is listening on all interfaces. Proposed plan:

Update packages
Whitelist your current IP in UFW
Setup SSH keys and disable passwords
Bind MySQL to localhost Shall I proceed?

What you get

Secure a new VPS before internet exposureIdentify and close unnecessary listening ports and servicesConfigure fail2ban and automated security updatesMigrate from password-based SSH to validated key-only authentication

About this skill

The problem

Exposing a server to the internet without a verified security baseline invites automated brute-force attacks and lateral movement. Manually checking SSH configs, firewall rules, and listening ports is error-prone and often leads to accidental lockouts.

What it does

Performs a non-destructive, read-only audit of OS versions, listening services, and firewall states.
Categorizes findings into critical, important, and advisory risk buckets based on exposure.
Implements hardening steps in a reversible order, prioritizing connectivity persistence.
Verifies every change with before-and-after command diffs to ensure the intended posture.
Generates a final report with actions taken, rollback instructions, and remaining risks.

Frameworks & tools

Linux distributions (Ubuntu, Debian, RHEL, CentOS), SSH, UFW, Firewall-cmd, nftables, systemd, and fail2ban.

Why this beats prompting it yourself

A standard LLM might suggest dangerous firewall commands that drop your current session. This skill enforces a "test-before-lock" workflow, requiring verification of new SSH keys and admin IP whitelisting before disabling legacy access or applying default-deny rules.

Use cases

Preparing a fresh VPS or bare-metal server for its first public IP exposure.
Conducting a post-incident review to identify stale users or unauthorized listeners.
Performing periodic security hygiene passes on a fleet of small servers.
Hardening a development box before deploying a reverse proxy or tunnel.