srx-mnha

srx-mnha is a skill for Codex from fastrevmd-lab/fwskillsshare. It costs 91 tokens per session (7,015 once invoked), scanned A, original, MIT.

A design and troubleshooting guide for Juniper SRX Multi-Node High Availability, where separate firewalls share selected live connection state so traffic can continue after a node or path failure. Unlike a chassis cluster, the nodes keep separate management, routing, and configuration identities.

In plain words
What is it for?
Use it for routed or hybrid high-availability designs involving service groups, routed HA links, link monitoring, BGP or BFD failover, virtual IPs, VPNs, NAT, routing instances, or DHCP.
Why use it?
It helps avoid treating this design like a single-firewall cluster and makes its routing, failover, synchronization, and failure behavior explicit.

Skill for Codex

Written for Codex: agents/openai.yaml present. Also seen: names the AskUserQuestion tool; mentions Codex.

Good fit Use it for routed or hybrid high-availability designs involving service groups, routed HA links, link monitoring, BGP or BFD failover, virtual IPs, VPNs, NAT, routing instances, or DHCP.

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Install with agentmods
npx agentmods add skills/fastrevmd-lab/fwskillsshare/srx-mnha
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 fastrevmd-lab/fwskillsshare --skill srx-mnha
Clone the repo
git clone --depth 1 https://github.com/fastrevmd-lab/fwskillsshare

Made for: Codex.

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 srx-mnha

README.md
[![agentmods](https://agentmods.dev/badge/skills/fastrevmd-lab/fwskillsshare/srx-mnha/github.svg)](https://agentmods.dev/skills/fastrevmd-lab/fwskillsshare/srx-mnha)
Your own site
<a href="https://agentmods.dev/skills/fastrevmd-lab/fwskillsshare/srx-mnha"><img src="https://agentmods.dev/badge/skills/fastrevmd-lab/fwskillsshare/srx-mnha/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 srx-mnha

Your own site · 80×15
<a href="https://agentmods.dev/skills/fastrevmd-lab/fwskillsshare/srx-mnha"><img src="https://agentmods.dev/badge/skills/fastrevmd-lab/fwskillsshare/srx-mnha.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 91 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,015 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00091 $0.07015
Opus 5 $0.00046 $0.03508
Sonnet 5 $0.00018 $0.01403
Haiku 4.5 $0.00009 $0.00702

Measured 9d ago against content hash 187be2d66b0e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

srx-mnha 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.

skills/srx-mnha/SKILL.md · 499 lines

How it starts

The opening of the file, as written. The whole thing — 499 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SRX Multi-Node High Availability (MNHA)

Overview

Multi-Node High Availability (MNHA) is Juniper SRX high availability built around independent SRX nodes that synchronize runtime state over routed HA links. Unlike chassis cluster, MNHA nodes do not become a single logical chassis. Each node keeps its own control plane, hostname, management, routing protocols, interface addressing, and node-specific configuration. Stateful firewall/NAT/IPsec runtime objects can still synchronize so traffic can survive a path or node failover when the design keeps routing, interfaces, policy, and HA state aligned.

Use MNHA as an L3-first HA design. Routing policy, BFD, link monitoring, service redundancy groups, and optional VIP behavior determine which node handles traffic. Avoid treating MNHA as a drop-in chassis-cluster clone; it solves different problems and has different failure modes.

Runtime intake

Use this skill only for MNHA-specific design and behavior. Use parsing-srx-configs for full-config extraction, srx-nat for general NAT, and srx-policy for general policy design. Before acting, inspect the request, artifacts, and approved read-only evidence. If unresolved facts materially change safety, scope, correctness, confidence, or output, read references/runtime-intake.md. For each unresolved material fact whose catalog condition is true, invoke Claude AskUserQuestion or Codex request_user_input before continuing or issuing an open-ended request. Ask at most three single-select catalog questions per round. After each response, ask another round whenever any unresolved material catalog condition remains true; continue only when none remain. Do not repeat answered questions or show the full catalog. Without a native tool, present each selected catalog question with its 2-3 labeled choices and a free-text Other path in concise plain text; do not substitute a generic checklist. Never request secrets or unredacted customer data. Answers are context, not live-change approval; obtain separate explicit approval before configuration, commit, upgrade, reboot, delete, or failover.

Read the full file on GitHub · 499 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. 9d ago First seen · 499 lines · 91 tokens per session scan A 187be2d66b0e

Subscribe to this mod's changes

srx-mnha is a skill published in the GitHub repository fastrevmd-lab/fwskillsshare (8 stars, last pushed 12d ago), licensed MIT. It adds 91 tokens to every session and 7,015 once invoked, about $0.0005 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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