## Connect over public IP with authorized networks

URL: https://docs.atlan.com/apps/connectors/database/cloud-sql/postgresql/how-tos/connect-over-public-ip-with-authorized-networks

> Connect Atlan to Cloud SQL for PostgreSQL over the instance's public IP, with Cloud SQL's authorized-networks list and SSL keeping everyone else out.

The fastest path: Atlan connects to your instance's public IP over TLS, and Cloud SQL's authorized-networks list plus SSL keep everyone else out. Four phases, each labeled with who performs it.

> **Note: New to these terms?**
>
>
> Read [How Cloud SQL connectivity works](https://docs.atlan.com/llms/connectors/cloud-sql-postgresql/how-cloud-sql-connectivity-works/llms.txt) first (5 minutes). It explains authorized networks, NAT IPs, and SSL modes in plain language.
>

## Prerequisites

- Your Cloud SQL instance has (or may have) a **public IP** enabled. Private-IP-only and must stay that way? Use the [self-deployed runtime](https://docs.atlan.com/llms/connectors/cloud-sql-postgresql/connect-a-private-ip-instance-via-the-self-deployed-runtime/llms.txt) instead.
- Someone with the **Cloud SQL Admin** role in your Google Cloud project for Phases 1–2.
- A database user for Atlan with the permissions from [Set up Cloud SQL for PostgreSQL](https://docs.atlan.com/llms/connectors/cloud-sql-postgresql/set-up-cloud-sql-postgresql/llms.txt) (role, `USAGE` on each schema, optional `SELECT` for previews).

## Four phases at glance

| Phase | What happens | Owner | Typical time |
|---|---|---|---|
| 1. Get Atlan's IPs | Find your tenant's egress IPs (self-serve or one ticket) | Atlan User | Minutes (GCP) / 1 business day (AWS/Azure via support) |
| 2. Allowlist | Add the IPs to the instance's authorized networks | Google Cloud admin | 15 minutes |
| 3. Align SSL | Check the instance's SSL requirement; match it in Atlan | Google Cloud admin + Atlan User | 10 minutes |
| 4. Connect & verify | Create the connection in Atlan and test | Atlan User | 30 minutes |

## Phase 1 - Get Atlan's egress IPs

**Owner:** Atlan User

1. Find your Atlan tenant's hosting cloud and region: **Admin Center → Overview → Deployment**.
2. **GCP-hosted tenant:** copy your region's static NAT IPs from the [Atlan Network Details page](https://docs.atlan.com/llms/governance/administration/atlan-network-details/llms.txt) - self-serve, no ticket.
3. **AWS- or Azure-hosted tenant:** [raise a support ticket](https://docs.atlan.com/llms/platform/submit-request/submit-request/llms.txt) with your tenant URL and ask for your tenant's public egress IPs. They're provisioned per tenant - a value copied from another company's setup will not work.

## Phase 2 - Add them to authorized networks

**Owner:** Google Cloud admin

In the Google Cloud console: **SQL → your instance → Connections → Networking → Authorized networks → Add a network**. Add each Atlan IP as a `/32` entry (a single address), or run:

```
gcloud sql instances patch my-instance \
 --authorized-networks=203.0.113.10/32,203.0.113.11/32 # your region's Atlan IPs + any existing entries
```

> **Danger: This command replaces the whole list**
>
>
> `--authorized-networks` **overwrites** the existing list - include every address that should stay allowed, not just Atlan's. Dropping an existing entry silently breaks someone else's access. Also add **all** IPs published for your region: Atlan traffic rotates across them, so a partial list causes failures that appear only some of the time.
>

## Phase 3 - Align SSL on both ends

**Owner:** Google Cloud admin + Atlan User

On the instance's **Connections → Security** tab, check the SSL setting:

| Instance setting | What to do in Atlan |
|---|---|
| Allow unencrypted and encrypted (default) | Enable SSL in the Atlan connection anyway - this is a public-internet path; there's no good reason to send traffic unencrypted. |
| **Allow only SSL connections** | You **must** enable SSL in the Atlan connection. With SSL off, the server rejects the attempt before your password is checked, with an error ending in `SSL off` - which looks like an authentication failure but isn't. |
| Require trusted client certificates | Client-certificate authentication needs coordination - [raise a support ticket](https://docs.atlan.com/llms/platform/submit-request/submit-request/llms.txt) before proceeding. |

## Phase 4 - Connect and verify

**Owner:** Atlan User

1. In Atlan, open **New workflow → Cloud SQL for PostgreSQL Assets** and choose the **Direct** extraction method.
2. In **Host**, enter the instance's **public IP** (from the instance Overview page) - *not* the private IP, *not* the instance connection name. Port is `5432` unless you changed it.
3. Choose your authentication method (Basic, or an IAM option - see [Special cases](https://docs.atlan.com/llms/connectors/cloud-sql-postgresql/special-cases/llms.txt) for IAM prerequisites), enter credentials, and click **Test connection**.

### Success checklist

- **Test connection** passes in the Atlan UI
- Preflight checks pass when you configure the crawler
- A crawl scoped to one small schema completes
- A full scheduled crawl completes

If any step fails, see [Troubleshooting Cloud SQL for PostgreSQL connectivity](https://docs.atlan.com/llms/connectors/cloud-sql-postgresql/troubleshooting-cloud-sql-postgresql-connectivity/llms.txt).

## Next steps

[Crawl Cloud SQL for PostgreSQL](https://docs.atlan.com/llms/connectors/cloud-sql-postgresql/crawl-cloud-sql-postgresql/llms.txt): Configure and run the crawler to extract metadata from Cloud SQL

_Last updated: 27 August 2026._

---

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