# Service link public connectivity options
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You can configure the service link with a public connection for the traffic between the Outposts and home AWS Region. You can choose to use the public internet or Direct Connect public VIFs.

If you plan on allow-listing only AWS Region public IPs (instead of 0.0.0.0/0) on your firewalls, you must ensure that your firewall rules are up-to-date with the current IP address ranges. For more information, see [AWS IP address ranges](https://docs.aws.amazon.com/vpc/latest/userguide/aws-ip-ranges.html) in the *Amazon VPC User Guide*.

The following image shows both options to establish a service link public connection between your Outposts and the AWS Region:

![The service link public connection options.](http://docs.aws.amazon.com/outposts/latest/userguide/images/outpost-rack-sl-public-connectivity-options.png)


## Option 1. Public connectivity through the internet
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This option requires the AWS Outposts [service link infrastructure subnet IPs](https://docs.aws.amazon.com/outposts/latest/userguide/local-rack.html#service-link-subnet) to have access to the public IP ranges of your AWS Region or home Region. You must allow-list AWS Region public IPs or 0.0.0.0/0 on networking devices such as your firewall.

## Option 2. Public connectivity through Direct Connect public VIFs
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This option requires the AWS Outposts [service link infrastructure subnet IPs](https://docs.aws.amazon.com/outposts/latest/userguide/local-rack.html#service-link-subnet) to have access to the public IP ranges of your AWS Region or home Region over DX service. You must allow-list AWS Region public IPs or 0.0.0.0/0 on networking devices such as your firewall.

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for AWS Outposts. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query outposts` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).