> For the complete documentation index, see [llms.txt](https://docs.caf.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.caf.io/caf-api/all-id/security-best-practices.md).

# Security Best Practices

Security recommendations for deploying All ID.

## Network security

### Network segmentation

Deploy services in separate network tiers:

```
Public Tier    → Load Balancer (internet-facing) or Api Gateway
Private Tier   → Peer, Facematch
Database Tier  → MySQL (isolated, no internet access)
```

**Implementation**:

* Deploy load balancer in public subnet
* Deploy services in private subnets
* Deploy database in isolated subnet
* Use NAT gateway only if external bureaus are enabled

### IP whitelisting

Restrict external access to known IP addresses.

**Certta IPs**:

```
3.218.90.124/32
44.219.96.170/32
18.235.54.162/32
18.228.123.114/32
54.232.24.70/32
54.94.8.234/32
```

**Implementation**:

* Configure load balancer to accept traffic only from whitelisted IPs
* Apply IP restrictions at firewall/security group level
* Document approved IPs and review regularly


---

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