network-administration skillA
network-administration is agent-read markdown (skill) from cbrock84/headcount: Designs and operates the corporate network — segmentation, remote access, wireless, DNS and addressing, and diagnosing network problems. Use this to segment a network, set up or fix remote access, diagnose intermittent connectivity, plan addressing or DNS, or assess whether the network's trust assumptions still hold..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Network administration The network is the substrate everything else assumes works. It gets attention when it fails and is otherwise expected to be invisible, which is why its design debts persist for years. ## Segment by trust, and mean it A flat network means one compromised laptop reaches the finance server. Segmentation is the highest- value structural control available and the most commonly deferred. Separate at minimum: user devices, servers, management interfaces, guest, and anything unmanaged — printers, cameras, building systems, contractor equipment. That last category is the recurring entry point, because it is rarely patched and rarely owned. Default deny between segments, and permit specific flows. Rules that accumulate without review become an allow-all with extra steps; review them on a cadence and remove what no longer has a reason. ## Remote access The perimeter stopped being a perimeter when the workforce and the workloads left it. Treat network location as weak evidence of trust: being on the corporate network should not by itself grant access to anything sensitive. …
Read the whole file at its exact version.
How to install
mdr add cbrock84/headcount/network-administration@git:20260916.e72e404mdr add cbrock84/headcount/network-administration@sha256:bea8645a46018d45Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_vyimwlv3ouarbqpe)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260916.e72e404 latest | 2026-09-16 | e72e404 | 5,090 B | A | view · diff |
| git:20260830.8ec263e | 2026-08-30 | 8ec263e | 4,751 B | A | view · diff |
| git:20260829.3b7c308 | 2026-08-29 | 3b7c308 | 3,032 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5090 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
cbrock84/headcount · 1,664 stars · license MIT · pushed 2026-09-17 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vyimwlv3ouarbqpe GET https://markdownregistry.com/api/v1/resolve?ref=cbrock84/headcount/network-administration GET https://markdownregistry.com/api/v1/blob/bea8645a46018d45c244e0821772dffafe3be80679b66c4842540338b5b3b904
Your agent does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.