How to control access to your instance

Last updated on Jun 18, 2026

Observability is a service that is available on the Internet. Thus, it is accessible to everyone by default.
If you want to restrict access to an instance of Observability for specific address ranges, you can store an access control list (ACL).

Once configured, an IP filter prevents access from other Internet addresses to your Observability instance. Access is regulated for the ports of your:

Grafana
Metrics
Logs
Traces

This ACL only filters the access for this specific instance. If you work with multiple instances, you must configure the ACL for each instance individually.

Find your current IP address

If you want to allow access for your local machine, you can find your current public IPv4 address using the Cloudflare Trace Tool.

Copy the value shown after ip=, append /32 (which represents a single IP address), and add it to your ACL configuration.

Configure ACL via the Portal

You can manage your ACL directly in the STACKIT portal:

Open your Observability service.
In the Overview tab, navigate to the Access control (ACL IP Ranges) section.
Click Edit.
Click Add IP Range.
Enter your IPv4 address or CIDR network range (for example 203.0.113.15/32).
Click Save.

Configure ACL via the API

For a complete list of all available endpoints, parameters, and schemas, refer to the STACKIT Observability ACL API Specification.

CIDR format

Address ranges are specified in Classless Inter-Domain Routing (CIDR) format. By default, the CIDR is 0.0.0.0/0, which allows full access from anywhere.

Get current ACL

You can output the current ACL configuration of your instance:

Command:

stackit curl -X GET "https://argus.api.eu01.stackit.cloud/v1/projects/$PROJECT_ID/instances/$INSTANCE_ID/acl" \
  -H "accept: application/json"

Response:

{
  "message": "Successfully got acl",
  "acl": []
}

Create and change a new ACL

The ACL must always be completely rewritten (replaced), even if you only want to change or add a single value:

Command:

stackit curl -X PUT "https://argus.api.eu01.stackit.cloud/v1/projects/$PROJECT_ID/instances/$INSTANCE_ID/acl" \
  -H "accept: application/json" \
  -H "Content-Type: application/json" \
  --data '{
  "acl": [
    "192.168.1.0/24",
    "193.248.122.0/24",
    "193.218.22.0/28"
  ]
}'

Response:

{
  "message": "Successfully updated acl"
}

Delete ACL

To delete the ACL and restore default full access, send a PUT request with an empty array:

Command:

stackit curl -X PUT "https://argus.api.eu01.stackit.cloud/v1/projects/$PROJECT_ID/instances/$INSTANCE_ID/acl" \
  -H "accept: application/json" \
  -H "Content-Type: application/json" \
  --data '{
  "acl": []
}'

Response:

{
  "message": "Successfully updated acl"
}