How to Create an Azure Network Security Group

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

How to Create an Azure Network Security Group (Bicep, CLI, Terraform) drafts one Network Security Group on a lab Azure account you administer. The generator says to review before apply. Replace account IDs, images, and sample passwords. ami-replace-me and subnet-replace-me stay placeholders until you write the real names.

Do not allow 0.0.0.0/0 to SSH, RDP, or every port. A sample egress of 0.0.0.0/0 is a line you narrow or justify. The forms on this page are Bicep, CLI, and Terraform. You pick the one the ticket named. You do not apply any of them during the reading.

The browser tool drafts text. It does not log in. A public-access block in an object-storage draft stays on.

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.

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.

Write the account, project, or repository, and confirm you administer it.
Save the current file or export before any draft is applied.
Read the draft and delete every line this ticket did not name.
Replace account IDs, images, example.com, and any sample password.
Apply nothing during the reading.
Read the names back and compare them with the ticket.
Stop. The next change is a different page.

Mistakes that outlive the statement

Network Security Group on Azure goes wrong in a small set of ways. The list is here so the ticket can forbid them before the window.

Applying a draft you did not read.
The wrong account.
A secret, an access key, or a kubeconfig in git.
Two changes in one window.
No copy saved before the change.
A documentation address or example.com left in a file you apply.
An ingress from 0.0.0.0/0 left in the file.
Calling the generator output a finished production change.
Do not allow 0.0.0.0/0 to SSH, RDP, or every port. A sample egress of 0.0.0.0/0 is a line you narrow or justify.
Applying during the reading.

Decisions to write down

One decision for Network Security Group on Azure: The account is one you administer. The resource is only Network Security Group. The form is one of Bicep, CLI, and Terraform. Placeholders and sample passwords were replaced or the file was not applied. And nothing was applied during the reading.

Checks before you call it done

Confirm this before you call the change done: The account is written. The draft was read. 0.0.0.0/0 is absent from any ingress, or a person deleted it. No secret is in the note. Nothing was applied. And a second person can say the resource name. If one of those fails, stop.

# Review before apply. Replace account IDs, images, and sample passwords.
# Azure: Network Security Group.
# Do not apply during the reading.
# Delete an ingress of 0.0.0.0/0.
# Do not allow 0.0.0.0/0 to SSH, RDP, or every port. A sample egress of 0.0.0.0/0 is a line you narrow or justify.
# 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.

Before you leave the account

How to Create an Azure Network Security Group (Bicep, CLI, Terraform) 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.

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.

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