# IP Whitelist

### **IP Whitelisting**

Unlimited Residential users can authenticate using **IP Whitelisting**, available in the *Advanced Settings* panel.

This feature allows you to whitelist an unlimited number of IPv4 addresses.

When you whitelist an IP, that IP becomes authorized to access **all ports** (default + custom), without requiring username/password authentication.

**Important:**

* Only IPv4 addresses are supported.
* You can add one IP per line or use comma-separated values.
* Whitelisting works together with credential authentication.

**Example:**

```
127.0.0.1
192.168.1.100
```

This feature is especially useful for servers, automation systems, and tools that do not support username/password authentication.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.plainproxies.com/proxies/unlimited-residential-proxies/advanced-settings/ip-whitelist.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.