Networking Best Practices¶
Use these practices to prove how clients reach storage, how DNS resolves that path, and which fallbacks remain exposed.
This page's baseline at a glance — the recommended practices and the validation gate:
mermaid flowchart TD T["Networking Best Practices"] P1["Prefer private endpoints for production trust boundaries"] T --> P1 P2["Validate DNS ownership before cutover"] T --> P2 P3["Record the source-to-service path for each workload that"] T --> P3 V["Validation Checklist"] P1 --> V P2 --> V P3 --> V
Why This Matters¶
Storage networking problems often look like authorization or application failures until the actual path is reviewed carefully.
- Firewall rules and private endpoints change the effective ingress model.
- DNS mistakes can silently route traffic back to the public endpoint.
- Trusted-service and exception settings widen exposure more than teams expect.
Recommended Practices¶
- Prefer private endpoints for production trust boundaries.
- Keep firewall rules deny-by-default and review exceptions explicitly.
- Validate DNS ownership before cutover.
- Record the source-to-service path for each workload that depends on storage.
- Monitor network-dependent failures with storage metrics and logs.
Example review command¶
az storage account network-rule list \
--resource-group $RG \
--account-name $STORAGE_NAME \
--output table
| Command | Purpose |
|---|---|
az storage account network-rule list | Review the effective network allow-list before changing private or public access paths. |
--resource-group | Resource group that contains the storage account. |
--account-name | Name of the storage account whose rules are listed. |
--output | Output format for the result. |
Common Mistakes / Anti-Patterns¶
- Private endpoint without DNS validation: The endpoint exists, but clients still resolve the public name.
- Firewall sprawl: Large allow-lists with unclear ownership become de facto public access.
- Undocumented trusted-service bypasses: Exceptions accumulate until nobody can explain the effective boundary.
Validation Checklist¶
- [ ] Private endpoint, service endpoint, or public-path decision is documented.
- [ ] DNS resolution is tested from each client segment.
- [ ] Firewall rules and exceptions are reviewed.
- [ ] Public endpoint posture is justified.
- [ ] Network-dependent failure signals are monitored.