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Networking · Version 1.3.0 · Reviewed 2026-08-02

Private Connectivity Advisor

Make a defensible decision about private endpoint design and DNS resolution with evidence, explicit trade-offs, and a verification plan.

4 method steps 5 documented failure modes 4 diagnostic checks 7 quality gates

Designs private endpoints, peering, and DNS so traffic stays off the public internet and still resolves.

₹149 one-time

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What this skill helps you do

  • Private endpoint design
  • DNS resolution
  • Peering topology

How Private Connectivity Advisor works

You provide

Failing request path, timings, and intermediary configuration

It inspects

Layer isolation for private endpoint design: resolve, connect, handshake

It decides

A DNS resolution fix attributed to a specific hop

You verify

Reproduce from the affected path, not from a healthy one

What it checks first

Private Connectivity Advisor designs private endpoints, peering, and DNS so traffic stays off the public internet and still resolves. Use it when the work involves Private endpoint design, DNS resolution, Peering topology.

  1. Which layer the failure occurs at, since a name-resolution failure and a TLS failure look similar to the application.
  2. Whether the failure is symmetric, because one-way reachability points at policy rather than transport.
  3. Timing: connection setup, first byte, and transfer are separate problems with separate causes.
  4. Whether intermediaries such as proxies, load balancers, or service meshes terminate the connection.

Failure modes it recognizes

  • DNS search-path expansion adding latency and intermittent failures for external names.
  • An idle timeout on an intermediary silently closing connections a pool still believes are open.
  • MTU mismatch causing large payloads to hang while small requests succeed.
  • TLS SNI or certificate mismatch surfacing as a connection reset with no application log.
  • A policy denying return traffic, producing a timeout rather than a refusal.

Answers it will reject

  • Blaming the network before confirming resolution, routing, and policy each independently.
  • Increasing timeouts to mask an intermediary that is closing connections deliberately.
  • Testing from a different host or network than the one experiencing the failure.

Decision rules it applies

  • Isolate the layer before proposing a fix: resolve, connect, handshake, then request.
  • Reproduce from the affected network path; a successful test from elsewhere proves nothing.
  • Prefer connection-level evidence over application logs when the failure is pre-response.

Evidence it asks for

  • Capture resolution, connect, TLS, and first-byte timings separately.
  • Test with and without the intermediary to attribute the reset.
  • Confirm reachability in both directions rather than assuming symmetry.

The method inside

  1. Map the artifact, actors, boundaries, and invariants relevant to private endpoint design.
  2. Trace concrete failure or abuse paths for DNS resolution; do not report checklist items without a mechanism.
  3. Prioritize peering topology findings by impact, likelihood, confidence, and cost of correction.
  4. Recommend the smallest defensible change, then define how an independent reviewer can verify it.

Deliverables

  • Private endpoint design assessment
  • DNS resolution decision and action plan
  • Peering topology verification checklist

Evidence requirements

  • Functional and quality requirements
  • Scale, latency, consistency, cost, and compliance constraints
  • Current topology and alternatives considered

Quality gates

  • Every material claim traces to supplied evidence or is labeled as a hypothesis.
  • The response follows the declared deliverable contract.
  • No execution, access, measurement, or verification is invented.
  • Secrets and personal data are redacted rather than repeated.
  • The user receives a concrete independent verification step.
  • The relevant failure modes in this domain were considered rather than only the reported symptom.
  • No listed anti-pattern was recommended as a solution.

Example task

Input

We enabled private endpoints and now half our services cannot resolve the database hostname.

Expected output

Private endpoints change the address but not the resolution path, so clients using public DNS still get the public IP or nothing. The missing piece is a private DNS zone linked to every network that must resolve it, including peered ones...

Boundaries and compatibility

Ideal for

  • Private endpoint design: produce a decision or artifact grounded in supplied evidence.
  • DNS resolution: produce a decision or artifact grounded in supplied evidence.
  • Peering topology: produce a decision or artifact grounded in supplied evidence.

Out of scope

  • Producing a generic reference architecture without requirements
  • Hiding material trade-offs behind best-practice language

Agent compatibility

  • GitHub Copilot custom agents
  • Claude Agent Skills / SKILL.md
  • Any instruction-following chat model

Tool policy: Advisory by default. No tools are assumed. If the host provides tools, use read-only evidence gathering unless the user explicitly approves a scoped write or execution action.