3Com 3C13636 Configuration Manual page 526

3Com Router 3000 Ethernet Family
Configuration Guide
II. Network diagram
10.110.10.1
FTP Server
Internal PC
10.110.10.100
Figure 11-4 Network diagram for NAT configuration
III. Configuration procedure
# Configure address pool and access control list.
[3Com] nat address-group 1 202.38.160.101 202.38.160.105
[3Com] acl number 2001
[3Com-acl-basic-2001] rule permit source 10.110.10.0 0.0.0.255
[3Com-acl-basic-2001] 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 2001 address-group 1
# Set internal ftp server
[3Com-Serial3/0/0] nat server protocol tcp global 202.38.160.100 inside
10.110.10.1 ftp
# Set internal www server 1
[3Com-Serial3/0/0] nat server protocol tcp global 202.38.160.100 inside
10.110.10.2 www
# Set internal www server 2
[3Com-Serial3/0/0] nat server protocol tcp global 202.38.160.100 8080 inside
10.110.10.3 www
# Set internal smtp server
[3Com-Serial3/0/0] nat server protocol tcp global 202.38.160.100 inside
10.110.10.4 smtp
10.110.10.2 10.110.10.3
WWW Server 1 WWW Server 2
Internal Ethernet of enterprise
Internal PC
10.110.12.100
3Com Corporation
10.110.10.4
SMTP Server
DDN
External PC
11-15
Chapter 11 NAT Configuration