Nat Mapping Types - Telkom ADSL 5100 Instruction Manual

6.1.5 NAT Mapping Types

NAT supports five types of IP/port mapping. They are:
1. One to One: In One-to-One mode, the TELKOM ADSL 5100 maps one local IP address to one
global IP address.
2. Many to One: In Many-to-One mode, the TELKOM ADSL 5100 maps multiple local IP
addresses to one global IP address. This is equivalent to SUA (for instance, PAT, port address
translation).
3. Many to Many Overload: In Many-to-Many Overload mode, the TELKOM ADSL 5100 maps the
multiple local IP addresses to shared global IP addresses.
4. Many-to-Many No Overload: In Many-to-Many No Overload mode, the TELKOM ADSL 5100
maps each local IP address to a unique global IP address.
5. Server: This type allows you to specify inside servers of different services behind the NAT to be
accessible to the outside world.
The following table summarizes these types.
TYPE
One-to-One
Many-to-One (SUA/PAT)
Many-to-Many Overload
Many-to-Many No Overload
IP MAPPING
ILA1 IGA1
ILA1 IGA1
ILA2 IGA1
...
ILA1 IGA1
ILA2 IGA2
ILA3 IGA1
ILA4 IGA2
...
ILA1 IGA1
39