3Com 3C13636 Configuration Manual page 535

3Com Router 3000 Ethernet Family
Configuration Guide
Configure NAT entries for domain names to allow internal hosts to identify and access
the internal servers correctly by domain name.
II. Network diagram
10.0.0.2
WWW server
Figure 11-9 Network diagram for domain name-related NAT
III. Configuration procedure
# Configure internal FTP and WWW servers on interface Serial0/0/0.
[3Com] interface serial0/0/0
[3Com-Serial0/0/0] ip address 1.1.1.1 255.0.0.0
[3Com-Serial0/0/0] nat outbound 2000
[3Com-Serial0/0/0] nat server protocol tcp global 1.1.1.1 www inside 10.0.0.2
www
[3Com-Serial0/0/0] nat server protocol tcp global 1.1.1.1 ftp inside 10.0.0.3
ftp
[3Com-Serial0/0/0] quit
# Configure an ACL, permitting the 10.0.0.0/8 segment to access the Internet.
[3Com] acl number 2000
[3Com-acl-basic-2000] rule 0 permit source 10.0.0.0 0.0.0.255
[3Com-acl-basic-2000] rule 1 deny
# Configure interface ethernet1/0/0.
[3Com] interface ethernet1/0/0
[3Com-Ethernet1/0/0] ip address 10.0.0.1 255.0.0.0
10.0.0.3
FTP server
Internal Ethernet
DNS server
3Com Corporation
11-24
Internal PC
Ethernet1/0/0:
10.0.0.1
Serial0/0/0:
1.1.1.1 Router
DDN
Chapter 11 NAT Configuration