Practical tools for system, network, security, and operations administrators.

CLD-C0035 · Cloud Networking

Cloud DNS Routing Policies

Explain one DNS routing policy as a note. Do not change DNS during the reading.

Updated 25 October 2026 · Explainer

This is an original planning guide. It is not a vendor manual, an official standard, or legal advice. Example addresses use documentation ranges. Review every command before you paste it.

What this hour is for

Cloud DNS Routing Policies names the record, the policy, and the answers you would return. example.com stays a documentation name. You do not publish a record, and you do not point a name at an address you do not operate.

Write the account, project, or repository you administer, the name of this change, and the time. A second change waits until this line has been read back.

The browser tool drafts text or reads a paste you already hold. It does not log in, it does not scan, and it does not apply.

192.0.2.10/24, gateway 192.0.2.1, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. A sample password is replaced.

The change you can finish

Apply nothing while you are writing the note. When the lab window opens, it is one change on the account named in the ticket. Read the draft, then the account, then decide.

Rollback is the previous file, the previous plan, or the lab resource you can delete because it was only a lab.

  1. Write the zone you administer, or say the name is example.com.
  2. Name the policy in one sentence.
  3. Write the answers as documentation or as real.
  4. Do not change DNS.
  5. Stop.

Mistakes that outlive the statement

Cloud DNS Routing Policies goes wrong in a small set of ways. The list is here so the ticket can forbid them before the window.

Decisions to write down

One decision for Cloud DNS Routing Policies: The zone is yours or the name is documentation. Nothing is published. Answers are labelled. One policy is enough. And rollback is the previous record, written before any later change.

Checks before you call it done

Confirm this before you call the change done: The zone or example.com is written. Nothing was published. The policy is one sentence. Answers are labelled. And a second person can say the name was not changed. If one of those fails, stop.

# DNS policy note. Do not change DNS during the reading.

Before you leave the account

Cloud DNS Routing Policies ends when the account in the note is the account in the ticket. If it is not, stop.

The draft stays a draft until a person has read the names in it. A generator does not log in, does not apply, and does not scan.

192.0.2.10/24, gateway 192.0.2.1, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. A sample password is replaced. It is not a password you keep. 10.0.0.0/16 is a sample prefix, not a network you publish unless you already use it.

prompt-for-this is a reminder that a secret is missing. It is not an access key, a token, or a password you save. An Azure secret draft may contain a sample password. Replace it. Do not file it.

One change is the window. If two things move and the result is wrong, you will not know which one did it.

If the same step fails twice, stop for the day. Restore the copy you took first.

A second person reads the account and the change aloud. If they cannot find them in the ticket, the note is not done.

This page is a planning guide. It is not a vendor manual, not an official standard, not legal advice, and not an audit opinion. You do not apply it against an account you do not administer.

Tools for this guide

These tools run in the browser on this site. They do not log into your machines.

More in this cluster

The pillar for this page, and the next published pages filed with it.