---
title: "Allowed hosts and subnets"
slug: "administration-allowed-hosts-subnets"
description: "Manage the list of IP addresses from which users may log into your contact center."
tags: ["security", "IP address", "host", "subnet", "restricting access", "access", "domain"]
updated: 2025-09-22T16:58:13Z
published: 2025-09-22T16:58:13Z
canonical: "docs.voiso.com/administration-allowed-hosts-subnets"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.voiso.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Allowed hosts/subnets

**Who should read this article**: Administrators

Manage the list of IP addresses from which users may log into your contact center.

## Introduction

To enhance security and control access to your contact center, Voiso allows you to define a list of approved host and subnet IP addresses. When you enable the **Restrict access to specific hosts/subnets** option in the **Security** tab of the [System Settings](/v1/docs/administration-system-settings) page, only devices and SIP endpoints with listed IP addresses can access your contact center.

## Using the Allowed hosts/subnets page

The host and subnet table in the **Allowed hosts/subnets** page is sortable by label or host/subnet. Click the row header to change the sorting order. To delete a host/subnet from the list, hover your mouse pointer over it, then on the far right of the table row, click the trash can icon (**Delete** button).

![Allowed Host Subnets New Host Subnet](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Allowed%20Host%20Subnets.png)

## Adding a host or subnet

To add a new host or subnet, follow these steps:

1. Click **Add host/subnet**.
2. In the **Add host/subnet** panel, specify a label for the host or subnet.
3. Specify the IP address of the host or subnet in the **Host/subnet** field.
4. Click **Save**.

![Allowed Host Subnets New Host Subnet](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Allowed%20Host%20Subnets%20New%20Host%20Subnet.png)

## Editing a host or subnet

To edit a host or subnet, follow these steps:

1. Click its name in the **Allowed host/subnet** page to display the **Edit host/subnet** panel.
2. (Optional) Edit the label.
3. (Optional) Edit the IP address of the host/subnet.
4. Click **Save** to commit the change.

![Allowed Host Subnets Edit Host Subnet](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Allowed%20Host%20Subnets%20Edit%20Host%20Subnet.png)

## Related

- [System settings](/administration-system-settings.md)