3com 3031 Instruccion De Instalación

Figure 111   Networking diagram of NAT configuration case

Configuring address pool and access control list.

[3Com]nat address-group 1 202.38.160.101 202.38.160.105

[3Com]acl number 1

[3Com-acl-basic-1]rule permit source 10.110.10.0 0.0.0.255

[3Com-acl-basic-1]rule deny source 10.110.0.0 0.0.255.255

Allow address translation of segment at 10.110.10.0/24

[3Com-Serial3/0/0]nat outbound 1 address-group 1

Set internal ftp server

[3Com-Serial3/0/0]nat server protocol tcp global 202.38.160.100 

Set internal www server 1

[3Com-Serial3/0/0]nat server protocol tcp global 202.38.160.100 

Set internal www server 2

[3Com-Serial3/0/0]nat server protocol tcp global 202.38.160.100 8080 

Set internal smtp server

[3Com-Serial3/0/0]nat server protocol tcp global 202.38.160.100 

Fault 1: address translation abnormal

Problem Solving: enable the debug for NAT, and refer to 

 in the 

 command for specific operation. According to the Debugging 

information displayed on the router, initially locate the failure, and then use other 

DDN

Internal Ethernet of enterprise

Internal PC

FTP Server

10.110.10.1

WWW Server 1

10.110.10.2

WWW Server 2

10.110.10.3

SMTP Server

10.110.10.4

Internal PC

10.110.10.100

10.110.12.100

External PC