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NAT and Firewalls

What is NAT?

  • Network Address Translation maps private IP addresses to public IPs.
  • Hides internal network structure.

Types

  • Static NAT: one-to-one mapping
  • Dynamic NAT: many-to-many mapping
  • PAT (Port Address Translation): many-to-one mapping

Benefits

  • Adds security by obscuring internal IPs
  • Enables multiple devices to share single public IP