Tizian-Maxime-Weigt/TCP-Flag-Combinations
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Tizian Maxime Weigt 2025-05-30 00:00:42 +00:00
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@ -32,4 +32,19 @@ sequenceDiagram
Server-->>Client: SYN-ACK
Note left of Client: Client receives SYN-ACK
Client->>Server: ACK
Note right of Server: Connection established (and save the IP for auto whitelist)
Note right of Server: Connection established
# TCP 3-Way Handshake with Mitigation
```mermaid
sequenceDiagram
participant Client
participant Server
Client->>Server: SYN (seq = x)
Note right of Server: Server receives SYN, generates SYN cookie<br>Cookie = hash(source IP, source port, dest IP, dest port, seq, timestamp)
Server-->>Client: SYN-ACK (seq = y, ack = x+1, cookie in seq)
Note left of Client: Client receives SYN-ACK
Client->>Server: ACK (seq = x+1, ack = y+1)
Note right of Server: Server validates cookie<br>If valid, reconstructs state and establishes connection
Note right of Server: Connection established