Configuring DNS zones
The DNS zone configuration is the key to the global load balancing solution. This configuration contains the key DNS server settings, including:
- Domain name and name server details.
- Type—Whether the server is the master or a forwarder.
- DNSSEC—Whether to use DNSSEC.
- DNS RR records—The zone configuration contains resource records (RR) used to resolve DNS queries delegated to the domain by the parent zone.
You can specify different DNS server settings for each zone you create. For example, the DNS server can be a master for one zone and a forwarder for another zone.
Before you begin:
- You must have a good understanding of DNS and knowledge of the DNS deployment in your network.
- You must have authority to create authoritative DNS zone records for your network.
- You must have Read-Write permission for Global Load Balance settings.
After you have configured a DNS zone, you can select it in the DNS policy configuration.
To configure the DNS zone:
- Go to Global Load Balance > Zone Tools.
- Click the Zone tab.
- Click Create New to display the configuration editor.
- Complete the configuration as described in DNS zone configuration.
| Settings | Guidelines |
|---|---|
|
Name |
Configuration name. Valid characters are Note:
|
|
Type |
|
|
Domain Name |
The domain name must end with a period. For example: |
|
DNS policy |
Select the DNS policy you want the zone to use. |
|
Forward Options |
|
|
Forward |
|
|
Forwarders |
Select a remote server configuration object. |
|
Master Options |
|
|
TTL |
The $TTL directive at the top of the zone file (before the SOA) gives a default TTL for every RR without a specific TTL set. The default is 86,400. The valid range is 0 to 2,147,483,647. |
| Negative TTL | The last field in the SOA—the negative caching TTL. This informs other servers how long to cache no-such-domain (NXDOMAIN) responses from you. The default is 3600 seconds. The valid range is 0 to 2,147,483,647. |
|
Responsible Mail |
Username of the person responsible for this zone, such as Note: Format is |
|
Primary Server Name |
Sets the server name in the SOA record. |
|
Primary Server Address |
The IP address of the primary server. |
|
DNSSEC |
Enable/Disable DNSSEC Only when a DNS policy has been set, and DNESSC is enabled, will the Back Up DSSET Key appear. It includes the following types of key:
|
|
DSSET List |
Select a DSSET configuration object. See Configuring the DSSET list. |
| Serial |
Set the serial number of the zone. Default 10004. Range 1-4294967295. |
| Notify Status |
Enable/Disable notify status. The IP in "also notify IP list" will be notified only when Notify Status is enabled. |
| Also Notify IP List |
Set a list of IP addresses that will be notified if Notify Status is enabled. |
| Allow Transfer |
Defines a list of IP addresses that are allowed to transfer the DNS zone information. By default there will be "Any" and "None." |
| FQDN Record | |
| FQDN Record table | Displays a summary of all DNS RR for the zone, including generated and manually configured RR. |
|
A/AAAA Record |
|
|
Hostname |
The hostname part of the FQDN, such as Note: You can specify the @ symbol to denote the zone root. The value substituted for @ is the preceding $ORIGIN directive. |
|
Type |
|
|
Weight |
Assigns relative preference among members—higher values are more preferred and are assigned connections more frequently. The default is 1. The valid range is 1-255. |
|
Address |
Specify the IP address of the virtual server. |
|
Method |
Weighted Round Robin is the only method supported. |
|
CNAME Record |
|
|
Alias |
An alias name to another true or canonical domain name (the target). For instance, |
|
Target |
The true or canonical domain name. For instance, |
|
NS Record |
|
|
Domain Name |
The domain for which the name server has authoritative answers, such as Note: FortiADC supports third-party domain names. |
|
Hostname |
The hostname part of the FQDN, such as |
|
Type |
|
|
Address |
Specify the IP address of the name server. |
|
MX Record |
|
|
Hostname |
The hostname part of the FQDN for a mail exchange server, such as |
|
Priority |
Preference given to this RR among others at the same owner. Lower values have greater priority. |
|
Type |
|
|
Address |
Specify the IP address. |
|
TXT Record |
|
|
Name |
Hostname. TXT records are name-value pairs that contain human readable information about a host. The most common use for TXT records is to store SPF records. |
|
Text |
Comma-separated list of name=value pairs. An example SPF record has the following form:
If you complete the entry from the the Web UI, do not put the string in quotes. (If you complete the entry from the CLI, you do put the string in quotes.) |
|
SRV Record |
|
|
Host Name |
The host name part of the FQDN, e.g., www. |
|
Priority |
A priority assigned to the target host: the lower the value, the higher the priority. |
|
Weight |
A relative weight assigned to a record among records of the same priority: the greater the value, the more weight it carries. |
|
Port |
The TCP or UDP port on which the service is provided. |
|
Target Name |
The canonical name of the machine providing the service. |
|
PTR Record |
|
|
PTR address |
A PTR address, such as 10.168.192.in-addr.arpa. or 1 |
|
FQDN |
A fully qualified domain name, such as "www.example.com". |