Detection approach
Netprobe telemetry is missing despite out-of-band DNS verification. The HTTPS probe connection on port 8443 failed or was suppressed/blocked, suggesting connection-layer shielding or blocking filters.
How this helps detect bots
Collect this signal alongside session context, request metadata, and other independent indicators. A single anomaly is a lead, not a verdict; corroborating anomalies make automated traffic more likely.
Legitimate traffic to consider
Users behind strict corporate or educational firewalls that block outgoing traffic on non-standard ports (e.g. 8443).
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