Prestige 324 Intelligent Broadband Sharing Gateway

3.Many to Many Overload: In Many-to-Many Overload mode, the Prestige maps the multiple local IP addresses to shared global IP addresses.

4.Many One-to-One: In Many One-to-Onemode, the Prestige maps the each local IP addresses to unique global IP addresses.

5.Server: This type allows you to specify inside servers of different services behind the NAT to be accessible to the outside world.

Port numbers do not change for One-to-Oneand Many One-to-OneNAT mappingtypes.When you select One-to-Oneor Many- One-to-OneNAT mapping, the firewall

automatically allows traffic through to the LAN computers you specify in the One- to-Oneor Many- One-to-Onemapping rules. This means that these LAN computers do not have firewall protection.

The following table summarizes these types.

Table 11-2 NAT Mapping Types

TYPE

IP MAPPING

SMT ABBREVIATION

 

 

 

One-to-One

ILA1ÅÆ IGA1

1:1

 

 

 

Many-to-One (SUA/PAT)

ILA1ÅÆ IGA1

M:1

 

ILA2ÅÆ IGA1

 

 

…

 

 

 

 

Many-to-Many Overload

ILA1ÅÆ IGA1

M:M Ov

 

ILA2ÅÆ IGA2

 

 

ILA3ÅÆ IGA1

 

 

ILA4ÅÆ IGA2

 

 

…

 

 

 

 

NAT

11-5