Dns Proxy Configuration Example - 3Com MSR 50 Series Configuration Manual

DNS Proxy
Configuration Example
n
round-trip min/avg/max = 1/1/3 ms
--- host.com ping statistics ---
5 packet(s) transmitted
0 packet(s) received
100.00% packet loss
Network requirements
Specify Device A as the DNS server of Device B (the DNS client).
■
Device A acts as a DNS proxy. The IP address of the real DNS server is 4.1.1.1.
■
Device B implements domain name resolution through Device A.
■
Network diagram
Figure 183 Network diagram for DNS proxy
Device B
DNS client
2.1.1.1 /24
2.1.1 .2/24
Configuration procedure
Before performing the following configuration, assume that Device A, the DNS
server, and the host are reachable to each other and the IP addresses of the
interfaces are configured as shown in
1 Configure the DNS server
This configuration may vary with different DNS servers. When a Windows 2000
server acts as the DNS server, refer to
Configuration Example" on page 613
2 Configure the DNS proxy
# Specify the DNS server 4.1.1.1.
<DeviceA> system-view
[DeviceA] dns server 4.1.1.1
# Enable DNS proxy.
[DeviceA] dns proxy enable
3 Configure the DNS client
Device A
DNS proxy
1.1 .1.1/24
IP network
Figure 183.
"Dynamic Domain Name Resolution
for related configuration information.
DNS Configuration Examples
4.1.1 .1/24
DNS server
3.1.1 .1/24
host.com
Host
617