## Allowlist Atlan IPs in AlloyDB authorized networks

URL: https://docs.atlan.com/apps/connectors/database/alloydb/postgresql/how-tos/allowlist-atlan-ips-in-alloydb-authorized-networks

> Enable a public IP on your AlloyDB for PostgreSQL instance and admit only Atlan's tenant-specific egress IPs through authorized networks.

If your security policy allows an internet-reachable database restricted to known addresses, enable a public IP on the instance and admit only Atlan's tenant-specific egress IPs. Fastest path - one support ticket for the IP list.

## Do I need this?

- **Yes**, if you chose the public path on the [chooser page](https://docs.atlan.com/llms/connectors/alloydb-postgresql/choose-how-atlan-connects-to-alloydb-postgresql/llms.txt) and your instance has (or can have) a public IP.
- **No**, if your AlloyDB is private-IP only and must stay that way - use the [self-deployed runtime](https://docs.atlan.com/llms/connectors/alloydb-postgresql/connect-through-the-self-deployed-runtime/llms.txt) or [PSC](https://docs.atlan.com/llms/connectors/alloydb-postgresql/set-up-private-service-connect-to-alloydb/llms.txt) instead. **There is no allowlist that makes a private IP reachable from Atlan.**

## Steps

1. *Atlan User* - [Raise a support request](https://docs.atlan.com/llms/platform/submit-request/submit-request/llms.txt) with your **tenant URL**, asking for your tenant's **public egress (NAT) IPs**. They are provisioned per tenant; there is no shared table to copy from (see [Atlan Network Details](https://docs.atlan.com/llms/governance/administration/atlan-network-details/llms.txt)).
2. *Google Cloud admin* - Enable a **public IP** on the AlloyDB instance (Connectivity settings). Note the assigned address.
3. *Google Cloud admin* - Add each Atlan egress IP to the instance's **authorized external networks**:

```
gcloud alloydb instances update my-instance \
 --cluster=my-cluster --region=us-central1 \
 --assign-inbound-public-ip=ASSIGN_IPV4 \
 --authorized-external-networks=203.0.113.10/32,203.0.113.11/32 # ← your tenant's IPs from support
```

4. *Atlan User* - In **New workflow → AlloyDB Assets** (Direct extraction), enter the instance's **public IP or public DNS name** as Host, port `5432`, credentials, then **Test connection**.

> **Danger: Do not enter the private IP as Host**
>
>
> With a public IP enabled, the instance has *two* addresses. The Host field must contain the **public** one. Entering the private `10.x.x.x` address fails from Atlan's side with `app internal error: 500` at test time - the most common first-time setup failure across GCP database connectors.
>

> **Caution: Every IP, exactly as given**
>
>
> Add **all** IPs support lists for your tenant, as `/32` entries (or the exact CIDR given). Outbound traffic rotates across the tenant's egress addresses - allowlisting only the one you saw in a log causes intermittent, hard-to-diagnose timeouts.
>

## Encryption

Connections use TLS. If your organization enforces `ssl` requirements on the AlloyDB side, no crawler change is needed - the connector negotiates TLS by default. Custom certificate requirements should be mentioned on your support ticket.

## When Atlan's IPs change

Because the values are tenant-specific, changes are communicated on your ticket and to tenant admins by email. If a long-working connection starts timing out with no change on your side, re-confirm the current IPs with support first - see [Troubleshooting AlloyDB connectivity](https://docs.atlan.com/llms/connectors/alloydb-postgresql/troubleshooting-alloydb-connectivity/llms.txt).

_Last updated: 27 August 2026._

---

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