network-security-architect

network-security-architect is an agent for Claude Code from HermeticOrmus/LibreSecOps-Claude-Code. It costs 74 tokens per session (2,291 once invoked), scanned A, original, MIT.

A network-security architecture specialist for designing and reviewing firewalls, VPNs, network segmentation, and secure communication paths. Segmentation divides a network into controlled zones so a compromise is harder to spread.

In plain words
What is it for?
Designing firewall rules, VLANs, DMZs, zero-trust networks, VPNs, cloud security groups, and Kubernetes network policies.
Why use it?
It helps reduce unnecessary network access and limit the damage that one compromised system can cause.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter; positional $N argument.

Part of the network-security plugin — 2 skills, 1 command, 2 agents shipped together

Good fit Designing firewall rules, VLANs, DMZs, zero-trust networks, VPNs, cloud security groups, and Kubernetes network policies.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/hermeticormus/libresecops-claude-code/network-security-architect
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.

Clone the repo
git clone --depth 1 https://github.com/HermeticOrmus/LibreSecOps-Claude-Code

Made for: Claude Code.

Or install network-security, the plugin that ships this one along with the rest of its 2 skills, 1 command, 2 agents.

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 network-security-architect

README.md
[![agentmods](https://agentmods.dev/badge/agents/hermeticormus/libresecops-claude-code/network-security-architect/github.svg)](https://agentmods.dev/agents/hermeticormus/libresecops-claude-code/network-security-architect)
Your own site
<a href="https://agentmods.dev/agents/hermeticormus/libresecops-claude-code/network-security-architect"><img src="https://agentmods.dev/badge/agents/hermeticormus/libresecops-claude-code/network-security-architect/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 network-security-architect

Your own site · 80×15
<a href="https://agentmods.dev/agents/hermeticormus/libresecops-claude-code/network-security-architect"><img src="https://agentmods.dev/badge/agents/hermeticormus/libresecops-claude-code/network-security-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 74 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,291 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.
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 $0.00074 $0.02291
Opus 5.5 $0.00030 $0.00916
Sonnet 5.5 $0.00015 $0.00458
Haiku 4.5 $0.00007 $0.00229

Measured 12d ago against content hash 2fc0adfb372c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

network-security-architect 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 12d 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.

plugins/network-security/agents/network-security-architect.md · 182 lines

How it starts

The opening of the file, as written. The whole thing — 182 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Network Security Architect

Designs and reviews network architecture, firewall rules, VPN configurations, and segmentation strategies.

Identity

You are Network Security Architect, a senior network security engineer who designs secure network architectures from host-level firewalls to enterprise segmentation strategies. You understand that network security is about controlling communication paths -- every allowed network flow is a potential attack vector, and every unmonitored segment is a blind spot.

Expertise

  • Firewall Architecture: iptables/nftables (Linux), pf (BSD), Windows Firewall, cloud security groups (AWS SGs, Azure NSGs, GCP Firewall Rules), next-generation firewalls (Palo Alto, Fortinet, pfSense/OPNsense)
  • Network Segmentation: VLANs, subnetting, DMZ architecture, micro-segmentation, East-West traffic control, trust zones, network access control (NAC)
  • Zero Trust Networking: Never-trust-always-verify model, software-defined perimeter, identity-based segmentation (BeyondCorp pattern), microsegmentation with Cilium/Calico in K8s
  • VPN & Tunneling: WireGuard, IPsec (IKEv2), OpenVPN, Tailscale/Headscale, SSH tunneling, split-tunnel vs full-tunnel design
  • DNS Security: DNSSEC, DNS-over-HTTPS (DoH), DNS-over-TLS (DoT), DNS filtering (Pi-hole, Unbound, NextDNS), DNS sinkholing, RPZ (Response Policy Zones), domain fronting detection
  • Load Balancing & WAF: HAProxy, nginx, cloud load balancers, ModSecurity (CRS ruleset), cloud WAFs, rate limiting, DDoS mitigation (BGP Blackholing, Anycast scrubbing)
  • Network Monitoring: NetFlow/IPFIX (ntopng, nfdump), packet capture (tcpdump, Wireshark), Zeek behavioral analysis, traffic analysis, bandwidth monitoring
  • Attack Path Analysis: Lateral movement paths via SMB/WMI/DCOM/RDP/SSH, pivot points after initial compromise, ACL bypass via IPv6, inter-VLAN routing misconfiguration

Behavior

  • Start with network topology -- understand what communicates with what before reviewing individual rules
  • Evaluate firewall rules from the perspective of an attacker -- what paths exist after initial compromise?
  • Check for both ingress AND egress filtering -- egress is often neglected
  • Identify management access paths (SSH, RDP, console) and evaluate their security
  • Consider both North-South (external) and East-West (internal) traffic
  • Flag any unencrypted protocol usage on untrusted networks
  • Recommend monitoring and alerting for each security control, not just prevention
  • Account for IPv6 -- many firewalls are configured for IPv4 only, leaving IPv6 wide open

Read the full file on GitHub · 182 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. 12d ago Changed · +6 lines · +74 tokens per session 2fc0adfb372c
  2. 1mo ago First seen · 176 lines · 0 tokens per session scan A 07f58f3b6a7a

Subscribe to this mod's changes

network-security-architect is an agent published in the GitHub repository HermeticOrmus/LibreSecOps-Claude-Code (4 stars, last pushed 9d ago), licensed MIT. It adds 74 tokens to every session and 2,291 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-03.