NetOps Field Notes

netops-field-notes-mcp

The things I check by hand on network gear, as tools your coding agent can call: what changed between two config snapshots and how much it matters, whether a config passes the CIS/PCI basics, why a port will not pass 802.1X, which certificates are hiding inside a config and when they expire, what a device is and what it sits next to, what an OPNsense rule change actually does, and whether a proposed change is safe to push.

Read-only. Deterministic — no model call, so two engineers get the same answer. No account, no telemetry, nothing read from your disk: configs and logs go in as text.

Install

Pin the version.

Claude Code

claude mcp add netops-field-notes -- uvx --from "git+https://github.com/getlarkwright/[email protected]" netops-field-notes-mcp

Claude Desktop, Cursor, or any client with a JSON config

{  "mcpServers": {    "netops-field-notes": {      "command": "uvx",      "args": ["--from", "git+https://github.com/getlarkwright/[email protected]", "netops-field-notes-mcp"]    }  }}

Docker

{  "mcpServers": {    "netops-field-notes": {      "command": "docker",      "args": ["run", "-i", "--rm", "ghcr.io/getlarkwright/netops-field-notes-mcp:0.1.1"]    }  }}

Python 3.10 or newer for the uvx route (uv installs it). Also in the official MCP registry as io.github.getlarkwright/netops-field-notes-mcp.

Tools

diagnose_dot1x

The one that saves the most time. Paste what you have — any of the three inputs — and it names the failure mode rather than restating the log:

ROOT CAUSETwo defects: (1) dot1x failed on an EAP mismatch (EAP-TLS vs EAP-PEAP); (2) MAB thenAccepted with NO dynamic VLAN, so the endpoint landed on VLAN 10 instead of VLAN 30.
RECOMMENDED FIX1. Align EAP: either enroll a client cert + set the supplicant to EAP-TLS, OR allow EAP-PEAP   in the ISE auth policy for this port. Make both ends match.2. Fix the ISE authorization profile "MAB_Guest": add Tunnel-Type=VLAN(13),   Tunnel-Medium-Type=802(6), Tunnel-Private-Group-ID=30.3. On the access port add: `authentication event fail action authorize vlan 30` as a local backstop.

It knows the difference between a CoA sent to port 1700 and one sent to 3799, an unknown-CA failure and a missing client certificate, and a permit any any eq 443 dACL that IOS will reject.

find_certs_in_config

Web monitors watch ports. Certificates on network gear live in the config — Cisco crypto pki chains, RouterOS exports, OPNsense <crt> blobs — and expire without anybody watching. This reads them out of the text and applies the same rules as the endpoint check: expiry buckets, RSA under 2048, MD5/SHA-1 signatures, self-signed leaves (rated by where they are used), CA certificates inside 90 days of expiry.

What it does not do

• No account, no signup, no key. No telemetry.
• Nothing is read from your disk; every input is text you pass in.
• Nothing is written to a device. preflight_change tells you what would happen; applying it is your job, with the rollback it hands you.
• Two tools open a socket: check_tls_endpoint to the host you name (it refuses private and reserved addresses, so it cannot be turned on your own network), and latest_field_note to a public RSS feed.
• The compliance checks are regex over one config. They catch the obvious; they are not a benchmark run.

Where this comes from

These are the read-only cores of DriftWatch and its siblings, which run the same rules nightly across a fleet, keep the history, and turn the results into reports. Here you get the single-shot version on what you paste. That is deliberate — the rules are the useful part, and they work on their own.

Licence

MIT © Larkwright LLC. Written by James Son — network, security, and automation engineer — and run against a live multi-vendor lab before shipping. Corrections welcome, especially to the ISE code table.