User's Manual

Chapter 8 Network Address Translation (NAT)
P-660H-T1v3s User’s Guide
119
Port numbers do NOT change for One-to-One and Many-to-Many No Overload
NAT mapping types.
The following table summarizes these types.
8.6.6 Port Translation
The P-660H-T1v3s can translate the destination port number or a range of port
numbers of packets coming from the WAN to another destination port number or
range of port numbers on the local network. When you use port forwarding
without port translation, a single server on the local network can use a specific
port number and be accessible to the outside world through a single WAN IP
address. When you use port translation with port forwarding, multiple servers on
the local network can use the same port number and still be accessible to the
outside world through a single WAN IP address.
The following example has two web servers on a LAN. Server A uses IP address
192.168.1.33 and server B uses 192.168.1.34. Both servers use port 80. The
letters a.b.c.d represent the WAN port’s IP address. The P-660H-T1v3s translates
port 8080 of traffic received on the WAN port (IP address a.b.c.d) to port 80 and
sends it to server A (IP address 192.168.1.33). The P-660H-T1v3s also translates
Table 29 NAT Mapping Types
TYPE IP MAPPING
One-to-One ILA1 IGA1
Many-to-One (SUA/PAT) ILA1 IGA1
ILA2 IGA1
…
Many-to-Many Overload ILA1 IGA1
ILA2 IGA2
ILA3 IGA1
ILA4 IGA2
…
Many-to-Many No Overload ILA1 IGA1
ILA2 IGA2
ILA3 IGA3
…
Server Server 1 IP IGA1
Server 2 IP IGA1
Server 3 IP IGA1