Firewall & IP Configuration

Firewall & IP Configuration with Altinn Studio

Network and Firewall Configuration

IPv4 and IPv6 Support

In compliance with the Regulation on IT Standards in Public Administration (FOR-2009-06-25-384), Altinn services support both IPv4 and IPv6 for all application traffic.

This dual-stack support is implemented across both test (TT02) and production environments. All applications deployed to Altinn’s platform now use infrastructure capable of handling traffic over both protocols.

Outbound IP Addresses for Applications

Each Altinn application communicates with external systems using a set of outbound public IP addresses. These addresses may be required for allowlisting in firewalls or API access control.

You can view your app’s current outbound IPs via the monitoring dashboards:

• TT02 (test): https://<org>.apps.tt02.altinn.no/monitor/

• Production: https://<org>.apps.altinn.no/monitor/

An ai-dev user is required to view the dashboards.

➡️ Navigate to: Dashboards → Altinn → PublicIPs

IP Naming Convention

The outbound IPs for each application follow this naming scheme:

• -prefix4: IPv4 address
• -prefix6: IPv6 address

These are the current active addresses following the infrastructure re-establishment carried out in late 2024.

Recommendations

If your systems enforce IP-based access controls or firewall rules:

• Ensure that both the -prefix4 and -prefix6 addresses are allowlisted.