Source label settings are located on the Administration > Networking: Source Labels page.

Source labels enable you to logically group sets of subnets so that you can apply a single in-path rule to the set. Using source labels, Client Accelerator administrators can create policies that define the optimization behavior of endpoint client software based on subnet.

You can add up to 64 IPv4 subnets to a source label, and a label’s name can contain up to 64 alphanumeric characters (dash and underscore characters are permitted). Separate subnet entries with commas, spaces, or line breaks. After you create a source label and add subnets to it, you can then create a single in-path rule and apply it to the label.