Easy Ip; Internal Server; Special Protocols Supported By Nat; Configuring Nat - H3C S7500 Series Operation Manual

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Operation Manual – NAT, Netstream, Policy Routing

H3C S7500 Series Ethernet Switches

which internal hosts the response packets should be forwarded to depending on the

destination addresses and port numbers carried in the packets.

1.2.3 Easy IP

The Easy IP feature enables you to associate an ACL directly with the IP address of a

VLAN interface that connects to the Internet by using the nat outbound command, so

that the NAT translates the source IP addresses of matching packets to this interface

address. This feature is useful when only one public IP address (the interface address)

is available or there are few internal hosts.

NAT conceals an internal network from the Internet and acts as a shield for internal

hosts. But in practical applications, it might be required to allow external hosts to

access certain internal devices such as internal WWW servers or FTP servers. By

using NAT, you can flexibly add internal servers with public IP addresses so that the

servers can be accessed by external hosts. For example, you can:

Configure public IP address 202.169.10.10 for an internal WWW server.

Configure public IP address 202.110.10.11 for an internal FTP server.

Configure public IP address and port number 202.110.10.12:8080 for an internal

The Comware NAT platform not only implements general NAT features, but also

provides complete NAT application-level gateway mechanism, enabling itself to

support a variety of special application protocols without any changing on the platform.

It has good scalability.

The special protocols supported by NAT include Internet control message protocol

(ICMP), domain name system (DNS), Internet locator service (ILS), H.323, FTP, and

NetMeeting 3.01.

Complete the following tasks to configure NAT:

Configuring a NAT Address Pool

Configuring NAT

Configuring Internal Server

Chapter 1 NAT Configuration

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