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.
npx skills add ashermahonin/agentic-skills --skill network-vpn-securitygit clone --depth 1 https://github.com/ashermahonin/agentic-skillsWrote 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.
[](https://agentmods.dev/skills/ashermahonin/agentic-skills/network-vpn-security)<a href="https://agentmods.dev/skills/ashermahonin/agentic-skills/network-vpn-security"><img src="https://agentmods.dev/badge/skills/ashermahonin/agentic-skills/network-vpn-security/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.
<a href="https://agentmods.dev/skills/ashermahonin/agentic-skills/network-vpn-security"><img src="https://agentmods.dev/badge/skills/ashermahonin/agentic-skills/network-vpn-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00060 | $0.00573 |
| Opus 5 | $0.00030 | $0.00287 |
| Sonnet 5 | $0.00012 | $0.00115 |
| Haiku 4.5 | $0.00006 | $0.00057 |
Grade A, and why
network-vpn-security scanned grade A with 0 findings 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 9d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 49 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Network VPN Security
Purpose
You design and troubleshoot connectivity by starting with traffic flows and trust boundaries. A network change is only good if it is reachable, predictable, secure, observable, and reversible.
Operational context
- Read
references/workflow.md. - Identify endpoints, networks, protocols, ports, trust zones, latency/bandwidth requirements, availability needs, compliance constraints, and current failure symptoms.
- Verify current documentation for cloud networking, VPN, firewall syntax, DNS, ingress, CNI, service mesh, load balancers, PKI/TLS, and CLI/API behavior.
Safe change sequence
- Define who must communicate with whom, over which protocol/port, from where to where, and what must remain blocked.
- Model topology, trust boundaries, segmentation, routing, DNS, NAT, firewall placement, HA, observability, and admin access.
- For VPN, define type, protocol, authentication, encryption, lifetime/rekey, NAT traversal, split/full tunnel, routes, DNS, and endpoint hardening.
- Implement rules, routes, DNS, VPN/IaC/configuration, and validation commands with least privilege.
- Validate real traffic path, DNS, route tables, tunnel status, firewall decisions, auth, logs, failover, MTU, and rollback.
Safety rules
- Use Context7 MCP for current cloud, Kubernetes, IaC, CI/CD, container, observability, security, network, API, CLI, provider, and configuration documentation whenever the task depends on external technology behavior.
Change record
Provide topology, trust boundaries, documentation validation status, security model, implementation, validation steps, risks/rollback, and assumptions.
Verification
- Avoid broad
0.0.0.0/0,::/0, any-any, and oversized CIDRs without explicit risk. - Use deny-by-default and allow-by-exception where possible.
- Do not ignore DNS, MTU, NAT, or asymmetric routing during troubleshooting.
- Keep user access, admin access, and service-to-service connectivity separated where possible.
- Include logging and audit for critical access paths.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 49 lines · 60 tokens per session scan A 238757f60237
network-vpn-security is a skill published in the GitHub repository ashermahonin/agentic-skills (10 stars, last pushed 16d ago), licensed MIT. It adds 60 tokens to every session and 573 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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