agentmods.dev

hardening-infrastructure

hardening-infrastructure is a skill for Claude Code from iamnolanhu/digitalocean-skills. It costs 47 tokens per session (1,350 once invoked), scanned A, original, MIT.

A guide for securing DigitalOcean servers and networks by checking settings such as firewalls, access keys, private networks, updates, backups, and HTTPS.

In plain words
What is it for?
Use it to audit or harden existing infrastructure, restrict SSH and database access, review team permissions, and check SSL/TLS settings.
Why use it?
It helps find common security weaknesses and prepare infrastructure for security reviews or compliance requirements.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the digitalocean-skills plugin — 9 skills, 6 commands, 3 agents, 1 hook shipped together

not rated 4repo 7mo ago A scan 47 tokens original MIT

Good fit Use it to audit or harden existing infrastructure, restrict SSH and database access, review team permissions, and check SSL/TLS settings.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/iamnolanhu/digitalocean-skills/hardening-infrastructure
View source ↗ iamnolanhu/digitalocean-skills
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add iamnolanhu/digitalocean-skills --skill hardening-infrastructure
Clone the repo
git clone --depth 1 https://github.com/iamnolanhu/digitalocean-skills

Made for: Claude Code.

Or install digitalocean-skills, the plugin that ships this one along with the rest of its 9 skills, 6 commands, 3 agents, 1 hook.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for hardening-infrastructure

README.md
[![agentmods](https://agentmods.dev/badge/skills/iamnolanhu/digitalocean-skills/hardening-infrastructure/github.svg)](https://agentmods.dev/skills/iamnolanhu/digitalocean-skills/hardening-infrastructure)
Your own site
<a href="https://agentmods.dev/skills/iamnolanhu/digitalocean-skills/hardening-infrastructure"><img src="https://agentmods.dev/badge/skills/iamnolanhu/digitalocean-skills/hardening-infrastructure/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for hardening-infrastructure

Your own site · 80×15
<a href="https://agentmods.dev/skills/iamnolanhu/digitalocean-skills/hardening-infrastructure"><img src="https://agentmods.dev/badge/skills/iamnolanhu/digitalocean-skills/hardening-infrastructure.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,350 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00047 $0.01350
Opus 5 $0.00023 $0.00675
Sonnet 5 $0.00009 $0.00270
Haiku 4.5 $0.00005 $0.00135

Measured 11d ago against content hash 3eb38ba06251, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

hardening-infrastructure scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s -H "Authorization: Bearer $DIGITALOCEAN_API_TOKEN" \
skills/hardening-infrastructure/SKILL.md · 193 lines

How it starts

The opening of the file, as written. The whole thing — 193 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Hardening Infrastructure

Comprehensive security hardening guide for DigitalOcean infrastructure covering network, compute, and access control.

When to Use

  • Security audits and reviews
  • Preparing for compliance (SOC2, HIPAA, PCI)
  • Hardening existing infrastructure
  • User mentions: "security", "harden", "audit", "compliance", "secure"

Security Audit Checklist

Network Security

  • All Droplets have cloud firewalls
  • SSH restricted to known IPs (not 0.0.0.0/0)
  • Database ports not publicly accessible
  • VPCs segment environments
  • No unnecessary ports open
  • Internal services use private IPs

Compute Security

  • SSH key authentication only (no passwords)
  • Monitoring enabled on all Droplets
  • Automatic backups for production
  • Droplets tagged for management
  • Latest OS images used
  • Unattended security updates enabled

Access Control

  • API tokens scoped appropriately
  • SSH keys have descriptive names
  • Unused SSH keys removed
  • Team access reviewed regularly
  • No shared credentials

SSL/TLS

  • All public endpoints use HTTPS
  • TLS 1.2+ only
  • Certificates not expiring within 30 days
  • CAA records restrict certificate issuance
  • HSTS enabled on web servers

The Process

1. Inventory

droplet-list
firewall-list
vpc-list
certificate-list
load-balancer-list
ssh-key-list

2. Audit Each Droplet

For each Droplet:

  1. Check firewall assignment
  2. Verify SSH key auth
  3. Check VPC membership
  4. Verify monitoring/backups
  5. Review tags

3. Remediation Priority

Priority Issue Example
Critical Immediate security risk Open database ports, no firewalls
High Significant risk SSH open to 0.0.0.0/0
Medium Best practice violation Missing backups
Low Improvement opportunity Inconsistent tags

Read the full file on GitHub · 193 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 193 lines · 47 tokens per session scan A 3eb38ba06251

Subscribe to this mod's changes

hardening-infrastructure is a skill published in the GitHub repository iamnolanhu/digitalocean-skills (4 stars, last pushed 7mo ago), licensed MIT. It adds 47 tokens to every session and 1,350 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

CloudDevOps and cloudSecurity
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