---
title: "Configure WatchGuard XTM 21 Series Router"
slug: "configure-watchguard-xtm-21-series-router"
updated: 2026-05-17T16:48:32Z
published: 2026-05-21T21:25:00Z
canonical: "help.8x8.com/configure-watchguard-xtm-21-series-router"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.8x8.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Configure WatchGuard XTM 21 Series Router

## Objective

Configure a WatchGuard XTM 21 Series router for use with 8x8 services.

## Applies To

- Watchguard XTM 21

## Procedure

The purpose of this article is to provide a **sample configuration**. At the time of article creation, this device was in a known working state on the firmware used. **Keep in mind different firmware versions will interact with hosted VoIP services in different ways.** While this device may be fully functional on the tested and/or current firmware version, it is possible newer revisions will cause disruptions in service or make a device fully compliant with the required settings for hosted VoIP services where it was previously not.

> [!NOTE]
> **Note**:
> 
> Traffic Shaper / Bandwidth Management does not appear to actually set reserved traffic as specified.

![watchguard.png](https://cdn.us.document360.io/e3a59e39-abd3-4423-964c-0a4008dc5673/Images/Documentation/14641)

## Administrative Information

1. Make sure your router is powered on and connected to your network.
2. In a browser on a computer on the same network as the router, navigate to the following IP address: **10.0.0.1:8080**.
3. Log in (default credentials shown below).
  - Username: **admin**
  - Password: **readwrite**

Tested on firmware version 11.2.B257005.

**Adding/editing 8x8 subnets is recommended when available.** See [X Series Technical Requirements](/support/docs/x-series-technical-requirements) for information on Network Requirements.

## Firewall Configuration

1. Go to **Firewall** > **Firewall Policies**.
2. Click **Add** to add the policies highlighted below.

## Add Aliases (8x8 Servers)

> [!NOTE]
> ***Note****:*
> 
> *8x8 subnets (server addresses) can be found in the* [X Series Technical Requirements](/support/docs/x-series-technical-requirements) *document.*

1. Go to **Firewall** > **Aliases**.
2. Enter **8x8 Servers** in the **Alias Name** and **Description** fields.
3. Add the 8x8 subnets by clicking the **Add Member** button.
4. Click **SaveB.**

## Configure Policies

1. Go to **Firewall** > **Firewall Policies**.
2. Add a Policy and go to **Policy Configuration** > **Policy**.
3. Name the policy **8x8** and check the box to **Enable** it.
4. Set Connections to **Allowed**.
5. From Any-Trusted.
6. Add **8x8 Servers** in the **To** field
7. Go to the **Properties** tab.
8. Enter information for the ports as seen below.
9. Check the box next to **Specify custom idle timeout** and set to the timeout to **300** seconds. This helps to prevent dropped calls.
10. Go to the **Advanced** tab.
11. Select the options below to enable the following in the **NAT** section:
  - 1-to-1 NAT (Use Network NAT Settings)
  - Dynamic NAT
    - Select **Use Network NAT Settings**
12. Click the checkbox next to **Override Per-Interface Settings**.
13. Set the following values for QoS:
  - Marking Type: **DSCP**
  - Marking Method: **Preserve**
  - Prioritize Traffic Based on: **Custom Value**
  - Value: **7 (Highest)**
14. Click **Save**.

## Traffic Management Policies

1. Go to **Firewall** > **Traffic Management** > **Policies**.
2. Add a Traffic Management Action called 8x8 Minimum.
3. For the 8x8 Policy, select **8x8 Minimum** as the Traffic Management Action.
4. Click **Save**.

## Configure Traffic Management Action Settings

1. Go to **Firewall** > **Traffic Management** > **Action Settings**.
2. Set the **Outgoing Interface**, **Minimum Bandwidth**, and **Maximum Bandwidth** to the values listed below.
3. Click **Save**.