3Com 3C433279A Release Note - page 6
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2.5
Below is an example of Dynamic NAT.
The command,
ADD NAT DYNAMIC USER NATD COUNT 4 PUBLIC_POOL_START 2.2.2.2
sets (the count of)
“4”
consecutive ISP-assigned addresses beginning with
the ISP-assigned address
“2.2.2.2”
to use for Dynamic NAT. In this case,
the range includes the ISP-assigned addresses, “2.2.2.2”, “2.2.2.3”,
“2.2.2.4”, and “2.2.2.5”.
“NATD”
represents the name that is assigned
for the connection for this configured range.
Each time a user connects to the public network, Dynamic NAT translates
the IP address from that user on the private network and maps it to the
first available public IP address from the contiguous range of ISP-assigned
addresses that you configured by using this command. The RAS 1500
maintains a table of active IP addresses on the public network mapped to
user IP addresses on the private network for the connection. Once the
connection to the public network is closed, the information in the table is
dropped and this IP address is free for the next connection. Each time a
user connects to the public network, the next available address from the
contiguous range is assigned, and a new table of mapped addresses is
established by the RAS 1500.
Static NAT
Release 2.5 includes support for Static NAT over the WAN interface. Static
NAT configures, and associates a name to, a mapping between and IP
address on the private network to a
specific
ISP-assigned address on the
public network that uses Static NAT.
You can set Static NAT through the Web Configuration Interface. From
the main, browser-based Web Configuration Interface page, click
Select
NAT/PAT Configuration
under the
Network
menu, choose NAT and
supply the following parameters:
■
User name
■
Public IP Address
■
Private IP Address
PUBLIC_POOL_START
The first of the contiguous range of IP addresses
assigned by Dynamic NAT mapping.
Parameter
Description
RelNotes2.5.fm Page 6 Thursday, June 8, 2000 2:42 PM