routeros-mac-telnet skillA
routeros-mac-telnet is agent-read markdown (skill) from tikoci/routeros-skills: MAC-Telnet protocol (MikroTik Layer-2 terminal/exec over UDP 20561) wire format, session handshake, and MD5 + MTWEI (EC-SRP) authentication. Use when: implementing or debugging a MAC-Telnet client/server, reaching a RouterOS device by MAC address without IP, parsing MAC-Telnet packets, understanding the WinBox-style L2 terminal, deciding between classic MD5 and modern MTWEI auth, or when the user mentions MAC-Telnet, mactelnet, mactelnetd, port 20561, or MTWEI/EC-SRP RouterOS login..
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
# MAC-Telnet — MikroTik Layer-2 Terminal Protocol MAC-Telnet lets you open an interactive RouterOS terminal (or run commands) addressing a device by its **MAC address** — you do not need to know or route to the target's IP. It works across a Layer-2 broadcast domain even when the target has no IP, a wrong IP, or an IP you cannot route to, which is why WISPs and provisioning tools rely on it. WinBox's "MAC Telnet" and the `tools/mac-telnet` CLI use this protocol family. ## Why This Matters for Agents - It is the only way to get a shell on a freshly-unboxed or misconfigured RouterOS device that has no reachable IP. - The protocol carries its **own 6+6-byte source/destination MAC addressing inside every packet**, independent of the outer UDP/L2 delivery. This trips up implementers who assume normal UDP semantics. - Authentication has **two incompatible modes** — classic **MD5** and modern **MTWEI (EC-SRP over Curve25519)**. Current RouterOS 7.x defaults to MTWEI; getting the mode-detection wrong is the single most common failure. - It is simple enough to implement from scratch for the MD5 path; MTWEI needs an elliptic-curve library. ## Protocol Basics …
Read the whole file at its exact version.
How to install
mdr add tikoci/routeros-skills/routeros-mac-telnet@git:20260626.c5a9200mdr add tikoci/routeros-skills/routeros-mac-telnet@sha256:24271252584a5266Pin 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_lmmctr54v6ee5slj)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260626.c5a9200 latest | 2026-06-26 | c5a9200 | 25,576 B | A | view · diff |
| git:20260626.c1f205c | 2026-06-26 | c1f205c | 25,563 B | A | view · diff |
| git:20260626.5284858 | 2026-06-26 | 5284858 | 22,133 B | A | view · diff |
| git:20260608.8851493 | 2026-06-08 | 8851493 | 22,113 B | A | view · diff |
| git:20260531.e70a808 | 2026-05-31 | e70a808 | 21,098 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 (25576 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
tikoci/routeros-skills · 64 stars · license MIT · pushed 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lmmctr54v6ee5slj GET https://markdownregistry.com/api/v1/resolve?ref=tikoci/routeros-skills/routeros-mac-telnet GET https://markdownregistry.com/api/v1/blob/24271252584a5266f5f7d8d51a36066b46312955ec3721f42415ff1a7274ac7f
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