srx-initial-setup

srx-initial-setup is a skill for Claude Code, Codex from fastrevmd-lab/fwskillsshare. It costs 169 tokens per session (6,297 once invoked), scanned A, original, MIT.

A setup procedure for Juniper SRX firewalls, which protect networks by filtering traffic, starting from factory settings or another incomplete state. It brings the device to a reachable state with network zones, traffic screening, and basic rules.

In plain words
What is it for?
Use it for Day-0 or Day-1 setup of supported SRX branch, campus, or datacenter devices, followed by verification of connectivity, zones, screening, and basic policy.
Why use it?
It removes the uncertainty of first-time firewall setup by checking the current state, identifying missing pieces, and applying only the required changes with rollback protection.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/fastrevmd-lab/fwskillsshare/srx-initial-setup
Any agent
npx skills add fastrevmd-lab/fwskillsshare --skill srx-initial-setup
Clone the repo
git clone --depth 1 https://github.com/fastrevmd-lab/fwskillsshare

Made for: Claude Code, 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-initial-setup

README.md
[![agentmods](https://agentmods.dev/badge/skills/fastrevmd-lab/fwskillsshare/srx-initial-setup.svg)](https://agentmods.dev/skills/fastrevmd-lab/fwskillsshare/srx-initial-setup)
Your own site
<a href="https://agentmods.dev/skills/fastrevmd-lab/fwskillsshare/srx-initial-setup"><img src="https://agentmods.dev/badge/skills/fastrevmd-lab/fwskillsshare/srx-initial-setup.svg" alt="Measured on agentmods" height="20"></a>
Per session 169 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,297 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00169 $0.06297
Opus 5 $0.00084 $0.03148
Sonnet 5 $0.00034 $0.01259
Haiku 4.5 $0.00017 $0.00630

Measured 4d ago against content hash fa3edc300523, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

srx-initial-setup 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 4d 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-initial-setup/SKILL.md · 382 lines

How it starts

The opening of the file, as written. The whole thing — 382 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SRX first-time setup

Overview

Use this skill to bring a new or factory-reset Juniper SRX from its shipped state to a reachable, zoned, screened, and minimally policied device. It automates Day-0 and Day-1 setup for Branch SRX300/400, campus SRX1600/4120, and datacenter SRX4300/4700/5000 platforms.

Architecture: assess-first, close only open gaps. This skill ALWAYS opens with a read-only entry-state assessment that determines current device state — factory-default, bare, partial, configured, or unreachable. It then computes a dependency-ordered gap list and proposes changes to close only the gaps that are actually open. Re-running it against a finished device proposes nothing and just reports the verification matrix.

Every device write runs behind a per-stage approval gate under confirmed commit with a rollback timer. If verification fails, the confirmed commit expires automatically and Junos rolls back to the pre-change configuration.

Validation status: At 1.3.0 this skill has been run end-to-end against a live SRX345 (srx345-dual-ac, Junos 21.2R3-S6.11, 2026-08-25) from factory-default state through the baseline policy stage. Both the read path and the write path are hardware-validated: the gate protocol, commit confirmed, per-stage verification, and the confirming commit were exercised on every stage. Eleven claims were corrected — see the validation record in references/factory-default-branch.md. Four of the eleven were silent failures that would have reported a gap closed while changing nothing or while degrading the device. Still unvalidated on hardware: rollback-on-verification-failure (no stage failed verification during the run), the other Branch SKUs, and all campus and datacenter platforms. Platform scope: Branch SRX300/400, campus SRX1600/4120, datacenter SRX4300/4700/5000. SRX1500 is end-of-sale and is not a validation target.

Scope and routing

Use this skill for first-time setup, Day-0 and Day-1 bring-up, factory-default removal or adoption, establishing management access (SSH, NETCONF), system services (NTP, DNS, hostname), creating interfaces and security zones with host-inbound-traffic rules, applying starter IDS screens, establishing a baseline security policy, and reading licensed feature entitlement and operational state.

Read the full file on GitHub · 382 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. 4d ago First seen · 382 lines · 169 tokens per session scan A fa3edc300523

Subscribe to this mod's changes

srx-initial-setup is a skill published in the GitHub repository fastrevmd-lab/fwskillsshare (8 stars, last pushed 7d ago), licensed MIT. It adds 169 tokens to every session and 6,297 once invoked, about $0.0008 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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