For PhoneHome (telemetry) and Remote Assist (support tunnels) to function correctly, TCP Port 443 (HTTPS) must be open for outbound traffic from all management ports (CT0.ETH0, CT1.ETH0, and the Virtual Management IP).
Pure Storage utilizes a secure, encrypted connection to communicate with the Pure1 Cloud and Support infrastructure.
PhoneHome: The array sends logs and heartbeat data to purestorage.com (and associated subdomains) via HTTPS over Port 443. If this port is blocked, the array cannot report its health status, preventing proactive support.
Remote Assist: This feature creates a reverse SSH tunnel encapsulated over HTTPS (websocket or similar secure transport) to allow Pure Support to remotely log in. It initiates the connection outbound to the support relay servers on Port 443.
Option A (Port 80) is generally not used for secure management traffic in modern configurations, often only serving as a redirect. Option C (Port 123) is required for NTP (Network Time Protocol) synchronization, which is critical for logs but is not the transport port for the PhoneHome/Remote Assist data stream itself. Therefore, verifying firewall rules for Port 443 is the primary troubleshooting step.