# Fastly::ComputeAclListEntriesItem ## Properties | Name | Type | Description | Notes | | ---- | ---- | ----------- | ----- | | **prefix** | **String** | An IP prefix defined in Classless Inter-Domain Routing (CIDR) format, i.e. a valid IP address (v4 or v6) followed by a forward slash (/) and a prefix length (0-32 or 0-128, depending on address family). | [optional] | | **action** | **String** | One of \"ALLOW\" or \"BLOCK\". | [optional] | [[Back to API list]](../../README.md#endpoints) [[Back to README]](../../README.md)