Yes, the datacenter proxies (Premium and Dedicated) support IP authentication. Dedicated proxies only support IP authentication, while Premium proxies also support username and password authentication. By default, you will receive 3 IP authentication slots for the premium proxies and 5 for the dedicated proxies. More slots can be purchased as an account upgrade.Please note that IP authentication only works with IPv4. To learn how to authenticate your IP on the proxies please refer to this article.
