Configuring A Nat Address Pool; Configuring Nat - H3C S7500 Series Operation Manual

Operation Manual – NAT, Netstream, Policy Routing
H3C S7500 Series Ethernet Switches
Configuring Non-Standard Internal FTP Server
Configuring NAT Blacklist
Configuring NAT Connection Aging Time
Configuring NAT Security Logging

1.3.2 Configuring a NAT Address Pool

A NAT address pool is a set of consecutive public IP addresses. During address
translation, the NAT server selects an IP address from the address pool as the
translated source address. You can use the nat address-group command to configure
an address pool.
Follow these steps to configure a NAT address pool:
Enter system view
Configure a NAT address
pool
Caution:
A NAT address pool can contain at most 256 IP addresses.
The IP addresses in a NAT address pool cannot be overlapped with the internal
network addresses.
A NAT address pool cannot contain any subnet or broadcast address.
You cannot delete an address pool that has been associated with an ACL.

1.3.3 Configuring NAT

By associating an ACL to a NAT address pool (or an interface address), you can make
the NAT server perform address translation for packets matching the ACL before
forwarding the packets at Layer 3, and directly forward the packets that do not match
the ACL without address translation. Before a packet from your internal network is
forwarded to any external network, it is first checked against the ACL. If it matches the
ACL, the NAT process uses the address pool or the interface address associated with
the ACL to translate the packet.
Task
To do...
system-view
nat address-group group-number
start-addr end-addr
Use the command...
1-6
Chapter 1 NAT Configuration
Remarks
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Optional
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Required