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

# Technical Guidelines

> Recommended browsers, operating systems, IP addresses, and domains to allow for Pear Start to run on your network.

Follow these guidelines to ensure a seamless setup of Pear Start in your district or school.

## Recommended Operating Systems

Use the two most recent versions of iPadOS, macOS, or Windows. ChromeOS is also supported and follows the recommended browser version below.

## Recommended Browsers

Use the latest version of Google Chrome, Microsoft Edge, or Safari.

## Allow IP Addresses

### HubSpot

```
54.174.60.0/23
143.244.80.0/20
18.208.124.128/25
54.174.53.128/30
158.247.16.0/20
54.174.59.0/24
54.174.63.0/24
3.93.157.0/24
54.174.52.0/24
139.180.17.0/24
54.174.57.0/24
158.247.22.109
```

### Sendgrid

```
167.89.110.173
```

### Postmark

```
50.31.156.96/27 (50.31.156.96 - 127)
104.245.209.192/26 (104.245.209.192 - 255)
50.31.205.0/24 (50.31.205.1 - 255)
```

## Unblock Domains

```
*.appcues.com
*.browser-intake-datadoghq.com
*.force.com
*.ggpht.com
*.hubspot.com
*.peardeck.com
*.salesforceliveagent.com
*.segment.com
*.ssqt.io
*.vimdeocdn.com
*.webflow.com
*.ytimg.com
peardeck.com
google.com
groove.goguardian.com
gstatic.com
hubspotqa.net
player.vimeo.com
s3.us-west-2.amazonaws.com
segment.io
share.hsforms.com
start.peardeck.com
static.doubleclick.net
vimeo.com
youtube.com
```