F3215-HP Load Balancing Module Network Management Configuration Guide-6PW101

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NAT DNS mapping configuration example
Network requirements
As shown in Figure 80, a company provides Web and FTP services to external users, and uses internal
IP network segment 10.110.0.0/16. The IP addresses of the Web and FTP servers are 10.110.10.1/16 and
10.110.10.2/16, respectively. The company has three public addresses 202.38.1.1/24 through
202.38.1.3/24. The DNS server is at 202.38.1.4/24.
• The public IP address 202.38.1.2 is used to provide services to external users.
• External users can use the public address or domain name of internal servers to access them.
• Internal users can access the internal servers by using their domain names.
Figure 80 Network diagram
Configuration procedure
# As shown in Figure 80, specify IP addresses for the interfaces. (Details not shown.)
# Enter the view of interface GigabitEthernet 0/2.
<LB> system-view
[LB] interface gigabitethernet 0/2
# Configure the internal Web server.
[LB-GigabitEthernet0/2] nat server protocol tcp global 202.38.1.2 inside 10.110.10.1 www
# Configure the internal FTP server.
[LB-GigabitEthernet0/2] nat server protocol tcp global 202.38.1.2 inside 10.110.10.2 ftp
[LB-GigabitEthernet0/2] quit
# Configure two DNS mapping entries: map the domain name www.server.com of the Web server to
202.38.1.2, and ftp.server.com of the FTP server to 202.38.1.2.
[LB] nat dns-map domain www.server.com protocol tcp ip 202.38.1.2 port www
[LB] nat dns-map domain ftp.server.com protocol tcp ip 202.38.1.2 port ftp
[LB] quit
Verifying the configuration
# After completing the configurations, display the DNS mapping configuration information.
<LB> display nat dns-map
NAT DNS mapping information:
There are currently 2 NAT DNS mapping(s)
Domain-name: www.server.com
Global-IP : 202.38.1.2
FTP server
10.110.10.2/16
Host A
10.110.10.3/16
Internet
GE0/1
10.110.10.10/16
GE0/2
202.38.1.1/24
LB
Web server
10.110.10.1/16
DNS server
202.38.1.4/24
Host B
202.38.1.10/24