Terms and Conditions

1. Agreement

These Terms and Conditions ("Terms") govern the TailMux website, account, downloads, and software. TailMux is provided by CQ Fabrication, Italy — VAT ID IT18383251008 ("CQ Fabrication", "we", "us").

By creating an account, purchasing, activating, or using TailMux, you agree to these Terms. If you act for an organisation, you confirm that you have authority to bind it. Our Privacy Policy explains how we process personal data.

2. TailMux and your account

TailMux is a developer tool for running isolated concurrent Tailscale userspace sessions and routing supported local traffic to the correct tailnet. Its capabilities, requirements, and limitations are described in the documentation.

TailMux is an independent CQ Fabrication product and is not affiliated with or endorsed by Tailscale Inc. Tailscale is a trademark of Tailscale Inc.

Keep your account credentials secure. Contact security@cqfabrication.com if you suspect unauthorised access or identify a security issue affecting TailMux.

3. License and updates

After full payment, CQ Fabrication grants the purchaser, whether an individual or an organisation, a non-exclusive license to install and use TailMux on the number of devices included with the purchase. You may not resell, rent, sublicense, or share the license outside those limits, except where mandatory law permits a transfer or CQ Fabrication agrees in writing.

The one-time purchase includes twelve months of updates from the purchase date. Your TailMux license does not expire. If you do not renew, you may continue using indefinitely the latest version released during your update period. Later releases require an optional update renewal, which is a separate one-time purchase and is never automatic.

Your account shows the update end date and entitled version. CQ Fabrication keeps releases versioned and makes that version available for re-download. Once activated and validated, it remains usable indefinitely, even if the update period has ended or the TailMux license service is unavailable.

The device limit shown before purchase and in your account applies. You may deactivate an old device to free a slot, but you must not bypass activation or license controls.

4. Purchases and consumer rights

Polar acts as merchant of record and authorised reseller. Polar handles payment, taxes, receipts or invoices, and the billing portal under the terms shown at checkout. CQ Fabrication grants the TailMux license under these Terms.

For transaction help or a refund request, use the link in your Polar receipt or contact hello@cqfabrication.com. A completed refund or chargeback of the TailMux license purchase revokes the related license and device activations.

Nothing in these Terms limits consumer rights or other rights that cannot lawfully be excluded.

5. Permitted use and your systems

Use TailMux only with systems and networks that you own or are authorised to access. You must not use it unlawfully, bypass activation or profile isolation, disrupt the Service, or distribute malware through it. Rights granted by mandatory law, including lawful interoperability and security research, are not restricted.

You are responsible for your Tailscale or Headscale accounts, access controls, credentials, configuration, remote systems, and backups.

Traffic routed through TailMux to your tailnets does not pass through CQ Fabrication systems at any time. We do not receive or inspect any of that traffic, its contents, or its credentials. Account, licensing, download, and support requests are handled as described in the Privacy Policy.

6. Ownership

TailMux, its branding, website, and documentation are owned by CQ Fabrication or its licensors. These Terms grant only the right to use TailMux as described above.

7. Availability, support, and liability

TailMux depends on operating systems, networks, and third-party services such as Tailscale or Headscale. We cannot promise uninterrupted availability or compatibility with every future third-party change. Support is provided on a reasonable-efforts basis unless a separate written agreement states otherwise.

Mandatory warranties and remedies remain unaffected. To the extent permitted by law, TailMux is otherwise provided "as is". CQ Fabrication is not liable for indirect or consequential loss, or for loss caused by user configuration or third-party systems. Nothing limits liability that cannot lawfully be limited.

8. Suspension and changes

CQ Fabrication may suspend online account services or revoke a license for confirmed fraud, unlawful use, a material breach of these Terms, or a security or legal requirement. The end of the update period or a decision not to renew is never a reason to revoke the license.

We may update these Terms and will communicate material changes by reasonable means. When required, signed-in users will be asked to accept the new version. A later version does not remove perpetual use or re-download rights already granted for the entitled TailMux release, except on the grounds above or where required by law.

9. Governing law and contact

These Terms are governed by Italian law without depriving consumers of mandatory protections available under the law of their country of residence. Courts have jurisdiction according to applicable mandatory rules.

Questions about these Terms may be sent to:

• CQ Fabrication, Italy — VAT ID IT18383251008
• cqfabrication.com
• hello@cqfabrication.com
• security@cqfabrication.com for security reports