AI Honeypot & Checksum Redirect

Phantom Grid's eBPF module doesn't just block unauthorized traffic; it actively misdirects attackers.

The Decoy Concept

Instead of leaving ports completely closed (which tells an attacker nothing is there), Phantom Grid can configure Decoy Ports (e.g., 3306 for MySQL, 2222 for SSH).

When an attacker's scanner (like nmap or masscan) hits a Decoy Port, the eBPF XDP hook intercepts the packet.

RFC1071 Checksum Recalculation

At the kernel level, redirecting a packet is not as simple as changing the port number. The TCP and IP headers contain Checksums - mathematical validations of the packet's integrity.

If eBPF simply alters the destination port from 3306 to 9090 (the Honeypot port), the packet's Checksum will become invalid. When this invalid packet travels up the Linux network stack, the OS will silently drop it, and the Honeypot will never receive it.

The Fix

Phantom Grid implements RFC1071 incrementally updated checksums using csum_replace2 in the eBPF C code:

// Example Checksum Recalculation
bpf_l4_csum_replace(skb, offset, old_port, new_port, sizeof(new_port));

This recalculates the checksum in nanoseconds without having to re-hash the entire packet. The packet is then seamlessly passed to the local AI Honeypot.

AI Threat Intelligence

The Honeypot (running on a hidden port like 9090) receives the attacker's payload.

It then uses an LLM (Large Language Model) to dynamically generate realistic responses (e.g., simulating a vulnerable MySQL database handshake). While the attacker wastes time trying to exploit the fake database, the Honeypot logs their IP, payloads, and tactics, sending a high-priority alert to your Slack/Teams dashboard.