Nat Mapping Types; Figure 35 Nat Application With Ip Alias - Nortel BSR252 Configuration - Basics

Figure 35 NAT application with IP Alias

NAT mapping types

NAT supports five types of IP/port mapping. They are:
• One to One: In One-to-One mode, the Business Secure Router maps one
local IP address to one global IP address.
• Many to One: In Many-to-One mode, the Business Secure Router maps
multiple local IP addresses to one global IP address. This is equivalent to
SUA (for example, PAT, port address translation), the Single User Account
feature (the SUA Only option).
• Many to Many Overload: In Many-to-Many Overload mode, the Business
Secure Router maps the multiple local IP addresses to shared global IP
addresses.
• Many One to One: In Many-One-to-One mode, the Business Secure Router
maps each local IP address to a unique global IP address.
• Server: With this type you can 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.
Chapter 8 Network Address Translation (NAT) Screens 133
Business Secure Router
Nortel Business Secure Router 252 Configuration — Basics