### Managing IP Addresses in Plesk

Every website hosted in Plesk requires an IP address. In Plesk, you can view, add, and manage IP addresses, and configure settings such as whether an IP address is dedicated or shared.

**Types of IP Addresses:**

- **Dedicated IP Address:** Assigned to a single account (Plesk administrator, customer, or reseller) but can host multiple websites within that account. Benefits include:

  - Hosting anonymous FTP shares.

  - Limiting the impact of IP reputation issues (e.g., spam).

  - Securing a single website with an SSL/TLS certificate if SNI (Server Name Indication) is unavailable.

- **Shared IP Address:** Used by multiple websites, regardless of the account they belong to.

**Viewing Registered IP Addresses:**

- **Navigate to:** `Tools & Settings` > `IP Addresses` (under “Tools & Resources”).

- You can search for IP addresses and view details like IP address type and the number of websites hosted.

**Adding IP Addresses:**

- **Go to:** `Tools & Settings` > `IP Addresses` (under “Tools & Resources”).

- Click `Add IP Address`.

  - **Select the network interface** for the new IP address.

  - **Enter the IP address** and subnet mask (e.g., 123.123.123.123/16).

  - **Optional:** Pair with a public IP if adding a private IP for public-facing websites.

  - **Choose whether the IP is shared or dedicated.**

  - **Select the default SSL/TLS certificate** for the IP.

  - **For Windows users:** Select the FTPS usage policy if applicable.

- Click `Save`.

**Updating the List of IP Addresses:**

- **Go to:** `Tools & Settings` > `IP Addresses` (under “Tools & Resources”).

- Click `Reread IP` to register all IP addresses present on the server’s network interfaces, which is necessary after adding IPs manually or through Virtuozzo.

**Hiding IP Addresses:**

- **To hide IP addresses:** 

  - Edit the `panel.ini` file and add:

    ```

    [ip]

    blacklist="<IP addresses to be hidden>"

    ```

    Replace `<IP addresses to be hidden>` with a comma-separated list of IP addresses (e.g., `192.168.1.10, 2002:5bcc:18fd:c:f482:d057:9ccf:993D`).

  - **Log in to Plesk**, go to `Tools & Settings` > `IP Addresses`, and click `Reread IP`.

**Assigning the Default Website to an IP Address (Plesk for Linux):**

- **Go to:** `Tools & Settings` > `IP Addresses` (under “Tools & Resources”).

- Click the desired IP address.

- Select the default website from the `Default site` menu.

- Click `Save`.

This allows you to manage IP addresses effectively, ensuring proper assignment and visibility within Plesk.