> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stackone.com/llms.txt
> Use this file to discover all available pages before exploring further.

# IP Restrictions

> Restrict a project's API access to specific IP addresses, ranges, or CIDR blocks.

<Info>
  Available to enterprise customers only.
</Info>

Restrict API access to specific IP addresses under **Project Settings → IP Restrictions**. Entries can take three formats:

| Format    | Example                       |
| --------- | ----------------------------- |
| Single IP | `192.168.1.100`               |
| Range     | `192.168.1.100-192.168.1.150` |
| CIDR      | `192.168.1.0/24`              |

If your network uses a NAT gateway, allow the gateway's external IP to permit all internal traffic.

<Note>
  With no allowlist configured, all IPs are allowed. Once you add entries, only those IPs can access your project's API.
</Note>