DNS proxy configuration example

As shown in Figure 48, configure Device A as the DNS proxy to forward DNS packets between the DNS client (Device B) and the DNS server at 4000::1.

Before performing the following configuration, make sure that:

• Device A, the DNS server, and the host are reachable to each other.

• The IPv6 addresses of the interfaces are configured as shown in Figure 48.

1. Configure the DNS server:

   This configuration might vary by DNS server. When a PC running Windows Server 2008 R2 acts as the DNS server, see "Dynamic domain name resolution configuration example" for configuration information.

2. Configure the DNS proxy:

   # Specify the DNS server 4000::1.

   <DeviceA> system-view
   [DeviceA] ipv6 dns server 4000::1
   

   # Enable DNS proxy.

   [DeviceA] dns proxy enable
   

3. Configure the DNS client:

   # Specify the DNS server 2000::2.

   <DeviceB> system-view 
   [DeviceB] ipv6 dns server 2000::2
   

# Verify that DNS proxy on Device A functions.

[DeviceB] ping host.com
Ping6(56 data bytes) 2000::1 --> 3000::1, press CTRL_C to break
56 bytes from 3000::1, icmp_seq=0 hlim=128 time=1.000 ms
56 bytes from 3000::1, icmp_seq=1 hlim=128 time=0.000 ms
56 bytes from 3000::1, icmp_seq=2 hlim=128 time=1.000 ms
56 bytes from 3000::1, icmp_seq=3 hlim=128 time=1.000 ms
56 bytes from 3000::1, icmp_seq=4 hlim=128 time=0.000 ms

--- Ping6 statistics for host.com ---
5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.000/0.600/1.000/0.490 ms