Which feature is essential for real-time communication between endpoints and the firewall?

The essential feature for real-time communication between endpoints and the firewall is Security Heartbeat. This feature enables the firewall to continuously monitor the security status of endpoint devices in the network. It checks for the presence of the Sophos agent on endpoints, ensuring that devices are compliant with security policies. If there are any issues, such as a disconnected agent or outdated software, the Security Heartbeat feature can alert the firewall to take appropriate action, which may include restricting access until the endpoint's security posture is restored.

This real-time monitoring capability allows for dynamic responses to potential threats and ensures that all endpoints are up-to-date with the latest security configurations. As a result, the Security Heartbeat serves as a critical component in maintaining a secure network environment by ensuring that all endpoints communicate their current security status to the firewall, thereby safeguarding against vulnerabilities.