Essential NAT types

 

Quick breakdown of essential NAT types:

🔴 Source NAT (S-NAT)
– Internal users accessing the internet (Source IP rewritten)
🟢 Destination NAT (D-NAT)
– External users accessing internal servers (Destination IP rewritten)
🔵 U-Turn NAT (U-NAT)
– Internal users accessing internal servers via public IPs (Both IPs rewritten)
🟣 Reverse NAT (R-NAT)
– Ensures return traffic reaches external users properly (Source IP in response rewritten)