ZyXEL Communications Intelligent Broadband Sharing Gateway P-324 - Manual (Page 120)

Prestige 324 Intelligent Broadband Sharing Gateway
NAT 11-5
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-One mode, 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-One and Many One-to-One NAT mapping
types.
When you select One-to-One or Many- One-to-One NAT mapping, the firewall
automatically allows traffic through to the LAN computers you specify in the One-
to-One or Many- One-to-One mapping 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
ILA2ÅÆ IGA1
…
M:1
Many-to-Many Overload ILA1ÅÆ IGA1
ILA2ÅÆ IGA2
ILA3ÅÆ IGA1
ILA4ÅÆ IGA2
…
M:M Ov