Recon Skills is a pack of security-testing skills covering reconnaissance, web applications, APIs, authentication, vulnerability validation, cloud infrastructure, and reporting. Security professionals use it for authorized assessments of systems they own or have written permission to test. The catalogue entries are individual skills from the pack.
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 uphiago/recon-skills --skill port-mass-scangit clone --depth 1 https://github.com/uphiago/recon-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/uphiago/recon-skills/port-mass-scan)<a href="https://agentmods.dev/skills/uphiago/recon-skills/port-mass-scan"><img src="https://agentmods.dev/badge/skills/uphiago/recon-skills/port-mass-scan/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/uphiago/recon-skills/port-mass-scan"><img src="https://agentmods.dev/badge/skills/uphiago/recon-skills/port-mass-scan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 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 YARA Match · line 62 YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
- medium YARA Match · line 19 YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
- medium Privilege Escalation · line 177 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.
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 | $0.00023 | $0.02397 |
| Opus 5 | $0.00012 | $0.01198 |
| Sonnet 5 | $0.00005 | $0.00479 |
| Haiku 4.5 | $0.00002 | $0.00240 |
Grade B, and why
port-mass-scan 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 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
- **Masscan requires root.** Uses raw sockets. Run as root or with `sudo`. Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
compatibility: Requires curl, nmap, masscan How it starts
The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Port Mass Scan Skill
High-speed port scanning methodology using RustScan for single hosts and Masscan for large IP ranges. RustScan provides 400x speedup over Nmap for 1000-port scans (3-10s vs 5-10min). Masscan handles /8 and /16 ranges that Nmap cannot. The ISP and government network examples below were from authorized infrastructure assessments with signed RoE.
When to Use
- Authorized red team engagement with signed RoE covering the target IP range.
- Fast single-host port discovery before Nmap service enumeration.
- After
subdomain-enumeration— scan resolved IPs for non-HTTP services. - ISP-wide or /8 scanning without explicit written authorization is illegal in most jurisdictions. This skill exists for legitimate authorized engagements, not mass scanning.
Prerequisites
terminalwith masscan, rustscan, and nmap installed.- For Masscan: root access (uses raw sockets), libpcap.
- For RustScan: nmap must be installed (for service enumeration pass-through).
How to Run
# Single host — RustScan (3-10 seconds for 1000 ports)
rustscan -a TARGET -r 1-65535 -- -sV
# /24 range — Masscan (2-5 minutes)
masscan -p1-65535 --rate=10000 -iL targets.txt -oJ scan.json
# /8 range — Masscan with banner grab (hours)
masscan -p80,443,8080,8443,22,3306,6379 --rate=50000 --banners -iL /8_range.txt -oJ scan.json
Quick Reference
| Scenario | Tool | Command | Time |
|---|---|---|---|
| Single host, all ports | RustScan | rustscan -a IP -r 1-65535 |
3-10s |
| /24 range, common ports | Masscan | masscan -p1-1000 --rate=10000 -iL /24.txt |
2-5 min |
| /16 range, web ports | Masscan | masscan -p80,443,8080,8443 --rate=50000 -iL /16.txt |
10-30 min |
| /8 camera hunt | Masscan | masscan -p554,80,8010 --rate=100000 -iL /8.txt |
Hours |
| Banner grab (1 IP) | Masscan | masscan -p1-65535 --banners --source-ip ETH0_IP IP |
1-5 min |
Performance Comparison (empirical, 5000+ scans)
| Tool | 1000 ports (1 host) | /24 (1000 ports each) | /8 (web ports) | Accuracy |
|---|---|---|---|---|
| Nmap | 5-10 min | ~30 min | Impossible (days) | 99% |
| RustScan | 3-10s | 15-30s | ~2 min | 98% (then Nmap -sV) |
| Masscan | 15-20s | 2-5 min | 30-60 min | 99% (TCP) |
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.
- 11d ago First seen · 190 lines · 23 tokens per session scan B 11b87d6b0948
port-mass-scan is a skill published in the GitHub repository uphiago/recon-skills (1,254 stars, last pushed 9d ago), licensed MIT. It adds 23 tokens to every session and 2,397 once invoked, about $0.0001 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 2026-08-30.
Other skills, from other repositories
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Full-spectrum security research skill for web servers, REST APIs, web applications, and network/port enumeration. Triggers whenever the user wants to: find vulnerabilities, run a security assessment, scan a target, test an API for security issues, enumerate ports or services, check for OWASP Top 10 vulnerabilities…
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implementing-aws-config-rules-for-compliance
Implementing AWS Config rules for continuous compliance monitoring of AWS resources, deploying managed and custom rules aligned to CIS and PCI DSS frameworks, configuring automatic remediation with SSM Automation, and aggregating compliance data across accounts.
implementing-cloud-dlp-for-data-protection
Implementing Cloud Data Loss Prevention (DLP) using Amazon Macie, Azure Information Protection, and Google Cloud DLP API to discover, classify, and protect sensitive data across cloud storage, databases, and data pipelines.
implementing-cloud-trail-log-analysis
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