Pourquoi IPv6 existe, comment reconnaître une adresse IPv6, et l'angle mort pour les outils IPv4.
Une note sur IPv6
En bref
Objectifs
- Reconnaître une adresse IPv6
- Expliquer le besoin d'IPv6
- Nommer le risque d'angle mort
IPv4 has about 4 billion addresses, and we ran out. IPv6 is the replacement: 128 bits, written as eight groups of hexadecimal, like 2001:db8::1. The number of addresses is effectively unlimited.
You do not need to master IPv6 yet, but you must recognise it — it is already carrying a large share of real traffic, and security tools that only watch IPv4 have a blind spot.
Defence
A firewall rule set written only for IPv4 quietly leaves IPv6 wide open. Whenever you harden a host, check both address families.
À retenir
- IPv6 fait 128 bits, en groupes hexadécimaux
- Il existe car IPv4 est épuisé
- Les règles IPv4 seules exposent IPv6