This chapter will tell how to configure DNS for Huawei Symantec.
The Domain Name System (DNS) establishes the mapping between domain names
and IP addresses for easy memorization.
A Domain Name System (DNS) is a host naming mechanism in character string
format of TCP/ IP to establish the mapping between domain names and IP
addresses. It is a mechanism of mapping easy-to-remember and meaningful domain
names to IP addresses recognizable for network devices.
DNS delivers the following functions:
1 Device Serving can be as a DNS Client
2 Device Serving can be as a DNS Proxy
3 Device Serving can be as a DDNS Client
USG2100/2200/5100
BSR/HSR & USG2000/5000 (such as USG2220, USG5310)Configuration Guide: Configuring the DNS for Huawei Symantec
Adding a DNS Server
The DNS server accepts the domain name resolution
requests initiated by the DNS client. You can statically set an IP address for
the DNS server connected to the device through this task. The IP address of the
DNS server is generally provided by the ISP. In addition, it can also be automatically
obtained, which requires the connection type of at least one interface to be configured
as DHCP or PPPoE.
The priority of the DNS server whose IP address is
statically configured is higher than the one whose IP address is dynamically
obtained. For the DNS servers whose IP addresses are configured in the same
way, the one that has an IP address (either obtaining automatically or configured
statically) earlier enjoys a higher priority. When resolving domain names, the
device sends query packets (according to the priorities) to DNS servers until
the query succeeds.
Step 1 Choose Network > DNS > DNS.
Step 2 Enter the IP address of the DNS server in the DNS Server List text box.
Step 3 Click Add.
If the operation succeeds, the new configuration whose Obtaining Mode is Static is displayed in DNS Server List.
Repeat the previous operations to add the IP addresses of multiple DNS
servers.
NOTE
l If the
obtaining mode of an entry in DNS Server List is DHCP, the IP address of the DNS
server is obtained dynamically through DHCP.
l If the
obtaining mode of an entry in DNS Server List is PPPoE, the IP address of the DNS
server is obtained dynamically through PPPoE.
----End
Deleting a DNS Server
You can deete only the DNS server IP addresses that are obtained
statically, but not those obtained through DHCP/PPPoE. If the interface that is
connected through DHCP or PPPoE is physically Down, or the interface fails to
be connected through DHCP or PPPoE, the corresponding DNS server IP address is
deleted automatically from the DNS server list.
Step 1 Choose Network > DNS > DNS.
Step 2 Select the check boxes of multiple entries or the check box in the table
header for selecting all.
Step 3 Click Delete.
If the operation succeeds, the entries that are just selected are not
displayed in DNS Server List.
----End
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