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Whitelist Registration Guide

 

1. Introduction

When using Kozutumi within a corporate network that enforces a whitelist policy, you may encounter issues such as being unable to access the service or download files if the required domains are not registered.

This article provides the list of domains necessary for using Kozutumi and points to consider when configuring your network.

2. Required Domains

Please register the following domains in your whitelist. These are essential for the proper operation of Kozutumi services.

Domain

Purpose

kozutumi.com

Official website and service platform

auth.kozutumi.com

Authentication (e.g., login)

app.kozutumi.com

File transfer and downloads

api.kozutumi.com

API communication

support.kozutumi.com

Support pages and Help Center

kozutumiprod.blob.core.windows.net

File storage and distribution (Microsoft Azure Blob Storage)

3. Notes

  • Impact of missing whitelist settings

    File transfer (including guest links) may not work, which could disrupt business operations.

  • VPN and proxy environments

    If you use Kozutumi through a VPN or proxy, the same whitelist configuration is required on those environments.

  • Communication requirements

    Kozutumi uses HTTPS (TLS). If communication is restricted by intermediate certificates or self-signed certificates, access may fail.

4. Frequently Asked Questions (FAQ)

Question

Answer

I still cannot access or download files after adding the domains.

Possible causes include DNS cache, unpropagated settings, or restrictions by proxy configuration. Please check with your network administrator.

Can I use Kozutumi in a VPN environment?

Yes, but the same whitelist settings must also be applied on the VPN side.

Are there any other settings required?

Please ensure that standard HTTPS communication is allowed.

5. Contact

If you have any questions regarding configuration, please contact Kozutumi Support.