aegis-cloudflared-tunnel-hardening SKILL.md skillB
aegis-cloudflared-tunnel-hardening from as-foss/aegis-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add as-foss/aegis-skills/aegis-cloudflared-tunnel-hardening@git:20260826.9702747Pins git:20260826.9702747 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- as-foss/aegis-skills
- Path
skills/server/cloudflared-tunnel/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260826.9702747, committed Aug 26, 2026
- First version recorded
- Aug 25, 2026
- Size
- 45,229 bytes
- Repository stars
- 16
- License
- Apache-2.0
Audits Cloudflare Tunnel (cloudflared) deployments for daemon credential exposure, imprecise ingress rules, origin double-binding that bypasses edge protections, spoofable visitor-IP trust, and unverifiable-from-host edge-layer controls — with read-only sweeps, interview checklists, and hardened reference configs.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## Scope & Objectives Audit one Linux host running the Cloudflare Tunnel daemon (`cloudflared`) — or the config-as-code repository that declares it. Eight domains, in priority order: 1. **Daemon discovery & run mode** — locate every cloudflared systemd unit; classify token-based mode (`cloudflared tunnel run --token ...`) vs config-file mode (`config.yml` + tunnel credentials JSON); detect undocumented or duplicate tunnels on one host. 2. **Identity-material exposure** — tunnel tokens embedded in unit files or environment variables, credentials JSONs (`/etc/cloudflared/<UUID>.json`), and the account-level `cert.pem`; permissions and placement. Whoever holds this material controls your tunnel. 3. **Ingress precision** — the `ingress:` table in `config.yml` is the tunnel's ACL: hostname→service mappings, terminal catch-all correctness, path-routing subtleties, origin targets pointing at LAN IPs, `noTLSVerify: true` hops, unix-socket targets. 4. **Origin binding discipline** — apps fronted by the tunnel MUST NOT also be reachable directly (wildcard binds, published container ports, missing firewall). Direct-to-origin access skips every Cloudflare protection. …
Read the whole file at its exact version.
How to install
mdr add as-foss/aegis-skills/aegis-cloudflared-tunnel-hardening@sha256:f90e150264a7402bThe line at the top of this page pins the label git:20260826.9702747, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_wvbbv6ey7ixney4x)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Aug 25, 2026 and Aug 26, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260826.9702747 latest | 2026-08-26 | 9702747 | 45,229 B | B | view · diff |
| git:20260825.85624bc | 2026-08-25 | 85624bc | 45,223 B | B | view · diff |
| git:20260825.244c198 | 2026-08-25 | 244c198 | 44,235 B | B | view |
Audit of the latest version
- fail: No link to a raw IP address (matched: http://192.168.1.50:8000)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (45229 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 script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
as-foss/aegis-skills · 16 stars · license Apache-2.0 · pushed 2026-08-26 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_wvbbv6ey7ixney4x GET https://markdownregistry.com/api/v1/resolve?ref=as-foss/aegis-skills/aegis-cloudflared-tunnel-hardening GET https://markdownregistry.com/api/v1/blob/f90e150264a7402be0733abdb7254f516e8d0fd77e04f035683cb21ac13c70b5
Your AI assistant 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.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.