configuring-snort-ids-for-intrusion-detection

configuring-snort-ids-for-intrusion-detection is a skill for Claude Code from 26zl/cybersec-toolkit. It costs 54 tokens per session (3,658 once invoked), scanned B, original, MIT.

A guide to Snort 3, a network intrusion detection system that inspects captured traffic for suspicious activity using detection rules. It covers custom and community rules, tuning, and sending alerts to security monitoring systems.

In plain words
What is it for?
Use it to deploy Snort on a network tap or mirrored switch port, write and tune rules, and validate alerts with authorized test traffic.
Why use it?
It helps teams detect attacks and policy violations in network traffic while reducing unnecessary alerts. It does not replace endpoint protection or other security controls.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Part of the cybersec-toolkit plugin — 197 skills, 2 hooks, 1 MCP server shipped together

Good fit Use it to deploy Snort on a network tap or mirrored switch port, write and tune rules, and validate alerts with authorized test traffic.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/26zl/cybersec-toolkit/configuring-snort-ids-for-intrusion-detection
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 26zl/cybersec-toolkit --skill configuring-snort-ids-for-intrusion-detection
Clone the repo
git clone --depth 1 https://github.com/26zl/cybersec-toolkit

Made for: Claude Code.

Or install cybersec-toolkit, the plugin that ships this one along with the rest of its 197 skills, 2 hooks, 1 MCP server.

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 configuring-snort-ids-for-intrusion-detection

README.md
[![agentmods](https://agentmods.dev/badge/skills/26zl/cybersec-toolkit/configuring-snort-ids-for-intrusion-detection/github.svg)](https://agentmods.dev/skills/26zl/cybersec-toolkit/configuring-snort-ids-for-intrusion-detection)
Your own site
<a href="https://agentmods.dev/skills/26zl/cybersec-toolkit/configuring-snort-ids-for-intrusion-detection"><img src="https://agentmods.dev/badge/skills/26zl/cybersec-toolkit/configuring-snort-ids-for-intrusion-detection/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 configuring-snort-ids-for-intrusion-detection

Your own site · 80×15
<a href="https://agentmods.dev/skills/26zl/cybersec-toolkit/configuring-snort-ids-for-intrusion-detection"><img src="https://agentmods.dev/badge/skills/26zl/cybersec-toolkit/configuring-snort-ids-for-intrusion-detection.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,658 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 25 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Tool Misuse · line 66
    Tool calls are chained to bypass individual safety checks or escalate capabilities beyond what any single tool call would allow.
    Fix: Limit tool chaining depth and validate the output of each tool before passing it to the next. Require explicit user approval for multi-step chains.
  • high Tool Misuse · line 71
    Tool calls are chained to bypass individual safety checks or escalate capabilities beyond what any single tool call would allow.
    Fix: Limit tool chaining depth and validate the output of each tool before passing it to the next. Require explicit user approval for multi-step chains.
  • high YARA Match · line 249
    YARA rule matched a known malware signature (reverse shell, backdoor, ransomware, C2 framework, or info stealer).
    Fix: Remove the malware payload or compromised file entirely. Investigate how it entered the skill and audit all other artifacts for additional indicators of compromise.
  • medium Privilege Escalation · line 58
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 82
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 103
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 110
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 111
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 231
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 238
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 323
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 66
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 71
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 72
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 85
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 88
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 114
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 210
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 215
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
  • medium Privilege Escalation · line 218
    Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.
    Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
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 $0.00054 $0.03658
Opus 5 $0.00027 $0.01829
Sonnet 5 $0.00011 $0.00732
Haiku 4.5 $0.00005 $0.00366

Measured 9d ago against content hash b3ba125665d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade B, and why

configuring-snort-ids-for-intrusion-detection scanned grade B with 2 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.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/agent.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

sudo apt install -y build-essential libpcap-dev libpcre3-dev libnet1-dev \

Makes network callslowCapability

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

wget https://www.snort.org/downloads/community/snort3-community-rules.tar.gz
Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.claude/skills/configuring-snort-ids-for-intrusion-detection/SKILL.md · 413 lines

How it starts

The opening of the file, as written. The whole thing — 413 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Configuring Snort IDS for Intrusion Detection

When to Use

  • Deploying a network-based intrusion detection system to monitor traffic at key network boundaries
  • Writing custom Snort rules to detect organization-specific threats, attack patterns, or policy violations
  • Tuning existing rulesets to reduce false positives while maintaining detection coverage
  • Integrating Snort alerts with SIEM platforms for centralized security monitoring
  • Validating network security controls by generating test traffic and confirming detection

Do not use as a replacement for endpoint detection, for monitoring encrypted traffic without TLS inspection, or as the sole security control without complementary defenses.

Prerequisites

  • Snort 3.x installed from source or package manager (snort --version to verify)
  • Network interface configured for promiscuous mode on a span port or network tap
  • DAQ (Data Acquisition Library) installed for packet capture integration
  • Registered Snort account for downloading Snort Subscriber (paid) or Community rulesets from snort.org
  • PulledPork 3 or similar rule management tool for automated ruleset updates
  • Sufficient CPU and memory for inline traffic inspection at line rate

Workflow

Step 1: Install and Verify Snort 3

# Install dependencies (Ubuntu/Debian)
sudo apt install -y build-essential libpcap-dev libpcre3-dev libnet1-dev \
  zlib1g-dev luajit hwloc libdumbnet-dev bison flex libcmocka-dev \
  libnetfilter-queue-dev libmnl-dev autotools-dev libluajit-5.1-dev \
  pkg-config cmake libhwloc-dev liblzma-dev openssl libssl-dev cpputest \
  libsqlite3-dev uuid-dev

# Install DAQ from source
git clone https://github.com/snort3/libdaq.git
cd libdaq && ./bootstrap && ./configure && make && sudo make install

# Install Snort 3
git clone https://github.com/snort3/snort3.git
cd snort3 && ./configure_cmake.sh --prefix=/usr/local
cd build && make -j$(nproc) && sudo make install
sudo ldconfig

# Verify installation
snort -V

Read the full file on GitHub · 413 lines

Files

What ships with it

3 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.

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 · 413 lines · 54 tokens per session scan B b3ba125665d7

Subscribe to this mod's changes

configuring-snort-ids-for-intrusion-detection is a skill published in the GitHub repository 26zl/cybersec-toolkit (54 stars, last pushed today), licensed MIT. It adds 54 tokens to every session and 3,658 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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