4 ms·

Guess - possibly some sort of outbound port-knock alternative: if (SYN->dest port && TTL > X) { ACK };

• egberts1 3y ago
  this
• ThePowerOfFuet 3y ago
  How is this supposed to work, exactly?
  • contingencies 3y ago
    https://en.wikipedia.org/wiki/Port_knocking https://en.wikipedia.org/wiki/Port_knocking https://wiki.archlinux.org/title/Port_knocking https://wiki.archlinux.org/title/Port_knocking
    • jsnell 3y ago
      Yes, but what does any of this have to do with TTL? Are you maybe confusing IP packet TTL with DNS record TTL?