HP VPN Firewall Appliances Network Management Configuration Guide

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Configuration guidelines

Follow these guidelines when you configure dynamic domain name resolution:

• You can configure up to six DNS servers, including those with IPv6 addresses, in system view, and

up to six DNS servers on all interfaces of a device.

• A DNS server configured in system view has a higher priority than one configured in interface view.

A DNS server configured earlier has a higher priority than one configured later in the same view.

A DNS server manually configured has a higher priority than one dynamically obtained through

DHCP. A name query request is first sent to the DNS server that has the highest priority. If no reply

is received, it is sent to the DNS server that has the second highest priority, and so on in turn.

• You can specify a maximum of ten DNS suffixes.

• The device can resolve a maximum of four IP addresses for a domain name.

Configuration procedure

To configure dynamic domain name resolution:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enable dynamic domain

name resolution.

dns resolve Disabled by default.

3. Specify a DNS server.

• Method 1 (In system view):

dns server ip-address

• Method 2 (In interface view):

a. interface interface-type

interface-number

b. dns server ip-address

c. quit

Use at least one method.

No DNS server is specified by

default.

4. Configure a DNS suffix.

dns domain domain-name

Optional.

By default, no DNS suffix is

configured and only the provided

domain name is resolved.

Configuring the DNS proxy

You can specify multiple DNS servers by using the dns server command repeatedly. Upon receiving a

name query request from a client, the DNS proxy forwards the request to the DNS server that has the

highest priority. If having not received a reply, it forwards to the request to a DNS server that has the

second highest priority, and thus in turn.

To configure the DNS proxy:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enable DNS proxy.

dns proxy enable Disabled by default.