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TCP-Track is a paid feature that automatically whitelists legitimate outbound traffic on a selected IP address. Instead of requiring you to write manual firewall rules or ask clients to reconnect after an attack triggers, TCP-Track continuously analyses your traffic in sensor mode and teaches the DDoS filters which connections are genuine — so they stay intact even when an attack is detected.

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How it works

1

Sensor mode activation

Once you request TCP-Track for an IP address, Packets Decreaser places that IP into sensor mode. The system begins passively monitoring all outgoing TCP traffic from that IP.
2

Real-time traffic analysis

Outgoing TCP connections are inspected in real time. The system builds a picture of normal traffic patterns: which destination IPs and ports your server communicates with, and how those connections behave over time.
3

Automatic whitelisting

When traffic on a connection is classified as legitimate, the source IP and its destinations are added to the DDoS filter allowlist. No manual rule creation is required.
4

Seamless filtering under attack

If a DDoS filter activates due to an incoming attack, already-whitelisted flows remain intact. Your established connections are not interrupted, and clients do not need to reconnect.
TCP-Track operates on a best-effort basis. In the event of an attack, detection and filter activation may take a few seconds, during which some new connections could be affected before whitelisting catches up.

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Supported port ranges

TCP-Track currently supports automatic whitelisting for the following port ranges: Support for additional ports may be available on request. Contact support to discuss your use case before requesting activation.

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Requesting activation

To enable TCP-Track on an IP address:
  1. Contact Packets Decreaser support.
  2. Provide the IP address you want to enable TCP-Track on.
  3. Describe your use case so support can confirm compatibility.
  4. Sensor mode is activated once support confirms the request.
Include as much detail as possible about your application and expected traffic patterns when contacting support. This helps the team confirm that TCP-Track is the right solution for your setup.

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Pricing

TCP-Track is a paid add-on, billed at €10/month per IP address.