---
title: How to ensure your firewall works with MASV
description: Configure your firewall with host names, port information, or IP address ranges to ensure MASV file transfers are permitted.
---
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# How to ensure your firewall works with MASV
## Configure your firewall with host names, port information, or IP address ranges to ensure MASV file transfers are permitted.
As a web-based app, MASV doesn’t usually require firewall configuration, but if you run into issues, you can configure your firewall with the host names or fully qualified domain names (FQDNs) and port information to ensure MASV file transfers are permitted. If you are working with the network layer, you can provide IP address ranges (AWS and Cloudflare) instead of host names.
**Important**: If you previously set up an allowlist for MASV, please see PubNub updates below.
### Firewall settings
Firewall software is designed to protect your devices, network, and data, but it can also block applications and websites that you need to access. To avoid issues, you can use the information below to add MASV to your firewall allowlist or exceptions list.
#### Ports
All MASV endpoints use port 443. This port supports HTTPS (Hypertext Transfer Protocol Secure) to ensure communications are encrypted through Transport Layer Security (TLS).
#### Host names
Add the following host names, or FQDNs, to your allowlist (also known as an exceptions list):
- api.massive.app
- api.masv.app
- api.massive.io
- api.masv.io
- massive.io
- masv.io
- get.massive.io
- get.masv.io
- app.massive.io
- app.masv.io
- help.massive.io
- help.masv.io
- developer.massive.io
- developer.masv.io
- \*.portal.massive.io
- \*.portal.masv.io
- \*.s3-accelerate.amazonaws.com
- \*.cloudfront.net
- \*.pubnub.com
- \*.pndsn.com
- \*.pubnub.net
- \*.pubnubapi.com
#### IP addresses
If you are working on the network layer, you can add IP addresses to your allowlist instead of host names. For MASV to work properly, you need to add IP address ranges for both AWS (Amazon Web Services) and Cloudflare services. If you are using storage integrations (cloud or device) with the MASV Agent, you also need to add IP address ranges for PubNub. Please refer to the links and IP addresses listed below.
- **AWS** IP address ranges: [https://ip-ranges.amazonaws.com/ip-ranges.json](https://ip-ranges.amazonaws.com/ip-ranges.json)
- **Cloudflare** IP address ranges: [https://www.cloudflare.com/ips/](https://www.cloudflare.com/ips/)
- **PubNub** IP address ranges:
❗**NEW** Add (Active starting August 2026)
- IPv4: 204.57.240.0/21
- IPv6: 2607:d540::/36
- IPv6: 2600:9000:a40c:fd8f::/64
- IPv6: 2600:9000:a71e:392b::/64
‼️ **OLD**: **Remove** all IP ranges listed below (Inactive as of November 1, 2026).
- - US:
54.175.191.192/26
52.9.63.128/26
54.236.3.168/29
54.241.191.232/29
34.223.51.128/27
EU:
54.93.254.232/29
35.157.63.192/26
Asia:
18.179.18.128/25
54.250.252.48/29
54.249.82.168/31
India:
13.232.67.192/27
Need more help with firewall questions? Contact us using our chat or send us an email: [support@masv.io](mailto:support@massive.io).
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