Tizian-Maxime-Weigt/TCP-Flag-Combinations
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Tizian Maxime Weigt 2025-04-29 11:43:00 +00:00
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# Some ideas for XDP based TCP filtering
| Flag Combination | Flags Set (Hex) | Purpose | IP+TCP Payload Size | Ethernet Frame Size | XDP Filtering Logic | | Flag Combination | Flags Set (Hex) | Purpose | IP+TCP Payload Size | Ethernet Frame Size | XDP Filtering Logic |
|------------------|-----------------|---------|---------------------|---------------------|---------------------| |------------------|-----------------|---------|---------------------|---------------------|---------------------|
| SYN | 0x02 | Initiates connection | 40–59 bytes | 64–77 bytes | Rate limit SYN packets per source IP to prevent floods. Drop if rate exceeds threshold. | | SYN | 0x02 | Initiates connection | 40–59 bytes | 64–77 bytes | Rate limit SYN packets per source IP to prevent floods. Drop if rate exceeds threshold. |