Questions about DNS behavior, supported platforms, certificates, VPN conflicts or rule updates.
Email support@zendefend.net →Support
Get a clear answer before you install.
Tell us your operating system, ZenDefend version and the behavior you are seeing. Never send passwords, payment card details or private keys.
Ask about plans, device limits, payment status, refunds, cancellation or license activation.
Email purchase support →Support checklist
Include the details that help us reproduce the issue.
Platform
Windows, macOS, iOS or Android, plus the OS version.
Product version
ZenDefend version, installation source and whether another VPN or DNS filter is active.
Expected result
What you expected, what happened, and whether the issue persists after restart.