# NAT
NAT = Network Address Translation RFC 1631, 1918, 2663
Functions:
- Imcomming: change the destination
- Ougoing: change the source
Terms
- Local network = inside
- Public internet = outside
# How NAT works
# Types
- Static: 1 local IP <--> 1 global IP
- Dynamic:
- n local IP <--> m global IP
- NAT choose 1 available global IP
- Overloading:
- n local IP <--> 1 global IP
- concurrent connection
- NAT:
<local IP, local port><--><global IP, global port>
- Overlapping
- NAT:
<local IP, port><--><global IP, port> - ouside can access inside actively
- NAT: