Fox IO JA4+ is a commercial network detection and response tool by Fox IO. RDFP is a free network detection and response tool. Compare features, ratings, integrations, and community reviews side by side to find the best network detection and response fit for your security stack.
Based on our analysis of core features, integrations, here is our conclusion:
Security teams running Zeek for network visibility will find immediate value in RDFP for identifying unauthorized or outdated Remote Desktop clients on the wire, something most NDR platforms treat as noise rather than a detection signal. The script requires no additional infrastructure beyond existing Zeek deployments and costs nothing, making it a quick add to detect client-side RDP vulnerabilities that endpoint tools often miss. Skip this if your organization relies on application allowlisting or has already eliminated RDP from your environment; RDFP is tactical network hygiene, not a replacement for access controls.
Protocol-layer network fingerprinting suite for bot, proxy & malware detection.
Zeek Remote desktop fingerprinting script for fingerprinting Remote Desktop clients.
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Common questions about comparing Fox IO JA4+ vs RDFP for your network detection and response needs.
Fox IO JA4+: Protocol-layer network fingerprinting suite for bot, proxy & malware detection. built by Fox IO. Core capabilities include TLS client fingerprinting (JA4), TLS server/session fingerprinting (JA4S), HTTP client fingerprinting (JA4H)..
RDFP: Zeek Remote desktop fingerprinting script for fingerprinting Remote Desktop clients..
Both serve the Network Detection and Response market but differ in approach, feature depth, and target audience.
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