DNS

Context

TCP/IP provides domain name system (DNS) to identify hosts using character strings in addition to their IP addresses. DNS uses a hierarchical naming scheme to specify a meaningful name for a network device. Mappings between domain names and IP addresses are established on a DNS server. DNS allows users to use meaningful and easy-to-remember domain names instead of IP addresses to identify devices.

Procedure

Static DNS

Create a static DNS entry.

Choose Configuration > Advanced Services > IP Services > DNS > Static DNS to access the Static DNS page, as shown in Figure 1.
Figure 1 Static DNS

Click Create.

Table 1 describes parameters on the page.

**Table 1** Creating a static DNS entry
Parameter	Description
Host Name	Specifies the domain name.
IPv4 address	Specifies the IPv4 address mapping the domain name.
IPv6 address	Specifies the IPv6 address mapping the domain name.

Set the parameters.
Click OK.

Delete a static DNS entry.
1. Choose Configuration > Advanced Services > IP Services > DNS > Static DNS to access the Static DNS page, as shown in Figure 1.
2. Select a record that you want to delete and click Delete. The system asks you whether to delete the record.
3. Click OK.
Update a static DNS entry.
1. Choose Configuration > Advanced Services > IP Services > DNS > Static DNS to access the Static DNS page, as shown in Figure 1.
2. Click Refresh.

Dynamic DNS

Configure the dynamic domain name resolution function.
1. Choose Configuration > Advanced Services > IP Services > DNS > Dynamic DNS to access the Dynamic DNS page, as shown in Figure 2.
  Figure 2 Dynamic DNS
2. Set Dynamic domain name resolution.
3. Set Source IPv4 address for connecting to the DNS server to a specified IP address or all IP addresses.
4. Set Source IPv6 address for connecting to the DNS server to a specified IP address or all IP addresses.

Create a dynamic DNS list.

Choose Configuration > Advanced Services > IP Services > DNS > Dynamic DNS to access the Dynamic DNS page, as shown in Figure 2.

Click Create in the Dynamic DNS List area. The Create a Dynamic DNS Entry page is displayed.

Table 2 describes parameters on the page.

**Table 2** Creating a dynamic DNS list
Parameter	Description
IP address format	Selects the IP address format: IPv4 IPv6
IP address	Specifies the IP address of a DNS server.
Interface name	This parameter is valid only when IP address format is set to IPv6. Click to select the outbound interface for communication with the DNS server. NOTE: Move the mouse to on the right to view the detailed rule.

Set the parameters.
Click OK.

Delete a dynamic DNS entry.
1. Choose Configuration > Advanced Services > IP Services > DNS > Dynamic DNS to access the Dynamic DNS page, as shown in Figure 2.
2. Select a record that you want to delete and click Delete in the Dynamic DNS List area. The system asks you whether to delete the record.
3. Click OK.
Update a dynamic DNS entry.
1. Choose Configuration > Advanced Services > IP Services > DNS > Dynamic DNS to access the Dynamic DNS page, as shown in Figure 2.
2. Click Refresh in the Dynamic DNS List area.
Create a domain name suffix list.
1. Choose Configuration > Advanced Services > IP Services > DNS > Dynamic DNS to access the Dynamic DNS page, as shown in Figure 2.
2. Click Create in the Domain Name Suffix List area. The Create Domain Name Suffix page is displayed.
  Figure 3 Create Domain Name Suffix
3. Set the domain name suffix.
4. Click OK.
Delete a domain name suffix entry.
1. Choose Configuration > Advanced Services > IP Services > DNS > Dynamic DNS to access the Dynamic DNS page, as shown in Figure 2.
2. Select a record that you want to delete and click Delete in the Domain Name Suffix List area. The system asks you whether to delete the record.
3. Click OK.
Clear a domain name suffix entry.
1. Choose Configuration > Advanced Services > IP Services > DNS > Dynamic DNS to access the Dynamic DNS page, as shown in Figure 2.
2. Select a record that you want to delete and click Delete in the Domain Name Suffix List area. The system asks you whether to clear the record.
3. Click OK.
Update a domain name suffix entry.
1. Choose Configuration > Advanced Services > IP Services > DNS > Dynamic DNS to access the Dynamic DNS page, as shown in Figure 2.
2. Click Refresh in the Domain Name Suffix List area.

Dynamic DNS Entry
1. Choose Configuration > Advanced Services > IP Services > DNS > Dynamic DNS to access the Dynamic DNS page, as shown in Figure 4.
  Figure 4 Dynamic DNS Entry
2. Click Clear All, Clear IPv4 Dynamic DNS Entries, or Clear IPv6 Dynamic DNS Entries. The system asks you whether to clear the record.
3. Click OK.