Configuring The Ipv4 Dns Client; Configuring Static Domain Name Resolution; Configuring Dynamic Domain Name Resolution - HP 3600 v2 Series Configuration Manual

The host sends a DNS request to the device to resolve the domain name of the HTTP server into an
1.
IP address.
Upon receiving the request, the device searches the local static and dynamic DNS entries for a
2.
match. If no match is found and the device does know the DNS server address, the device spoofs
the host by replying a configured IP address. The TTL of the DNS reply is 0. The device must have
a route to the IP address with the dial-up interface as the outgoing interface.
Upon receiving the reply, the host sends an HTTP request to the replied IP address.
3.
When forwarding the HTTP request through the dial-up interface, the device establishes a dial-up
4.
connection with the network and dynamically obtains the DNS server address through DHCP or
other autoconfiguration mechanisms.
When the DNS reply ages out, the host sends a DNS request to the device again.
5.
Then the device operates the same as a DNS proxy. For more information, see
6.
operates as
After obtaining the IP address of the HTTP server, the host can access the HTTP server.
7.
Because the IP address configured with DNS spoofing is not the actual IP address of the requested
domain name, the TTL of the DNS reply is set to 0 to prevent the DNS client from generating incorrect
domain name-to-IP address mappings.

Configuring the IPv4 DNS client

Configuring static domain name resolution

Configuring static domain name resolution refers to specifying the mappings between host names and
IPv4 addresses. Static domain name resolution allows applications such as Telnet to contact hosts by
using host names instead of IPv4 addresses.
Follow these guidelines when you configure static domain name resolution:
The IPv4 address you last assign to the host name will overwrite the previous one if there is any.
•
You may create up to 50 static mappings between domain names and IPv4 addresses.
•
To configure static domain name resolution:
Step
1. Enter system view.
2. Configure a mapping between a
host name and an IPv4 address.

Configuring dynamic domain name resolution

To send DNS queries to a correct server for resolution, dynamic domain name resolution needs to be
enabled and a DNS server needs to be configured.
In addition, you can configure a DNS suffix that the system will automatically add to the provided
domain name for resolution.
follows:."
Command
system-view
ip host hostname ip-address
90
"A DNS proxy
Remarks
N/A
Not configured by default