This domain delivers school panic-button alerts.
ad-sos.com is the alert-delivery endpoint for Active Defender, the school safety platform. When a staff member presses an Active Defender panic button, dedicated alert hardware at the school delivers the alert to this domain over HTTPS so that school staff and emergency responders can be notified immediately.
This domain serves machine-to-machine traffic from Active Defender devices. It is not a browsing destination, hosts no user-facing services, and cannot be used to proxy, tunnel, or bypass network filtering. To learn about the platform, visit active-defender.com.
For school network administrators
Active Defender is life-safety equipment. Devices at your site must be able to reach ad-sos.com on port 443, exempt from TLS/SSL inspection.
Content filters sometimes misclassify this machine-to-machine traffic as VPN or proxy activity — this is a known false positive. Please refer to the Active Defender network requirements document provided with your deployment, or contact your Active Defender representative at tjboyte@active-defender.com for allow-listing guidance.