3Com 10014299 Display and Debug NAT Display and debug NAT, Typical NAT Configuration Example

354 CHAPTER 21: CONFIGURING IP APPLICATION

Display and Debug NAT Table 388 Display and debug NAT

Operation	Command
Browse the condition of NAT	display nat [ translations [
	global ip-address inside
	ip-address ] ]
Clear up the mapping table of NAT	nat reset
Enable the information debugging of NAT event	debugging nat event
Enable the information debugging of NAT data	debugging nat packet
packet

Typical NAT Configuration Example

An enterprise is connected to WAN by the address translation function of an internal server.

I. Networking Requirement

An enterprise is connected to WAN by the address translation function of the 3Com Router series. It is required that the enterprise can access the Internet via serial port 0 of the 3Com Router series, and provide WWW, FTP and SNMP services to the outside, as well as two WWW servers. The internal network address of the enterprise is 10.110.0.0/16.

There are three legal public network IP addresses of the enterprise from 202.38.160.101 to 202.38.160.103. The internal FTP server address is 10.110.10.1, using the public network address 202.38.160.101. The internal

WWWserver1 address is 10.110.10.2. The internal WWW server 2 address is 10.110.10.3, using the 8080 port for external communications, and the two WWW servers both use the public network address 202.38.160.102. The internal SNMP server address 10.110.10.4. It is expected to provide uniform server IP address to the outside, using the public network address 202.38.160.103.

Internal network segment 10.110.10.0/24 may access Internet, but PC on other segments cannot access Internet. External PC may access internal server.