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When a client at a branch site initiates a DNS Domain Name System. A DNS server functions as a phone book for the intranet and Internet users. It converts human-readable computer host names into IP addresses and IP addresses into host names. It stores several records for a domain name such as an address 'A' record, name server (NS), and mail exchanger (MX) records. The Address 'A' record is the most important record that is stored in a DNS server, because it provides the required IP address for a network peripheral or element. query to a SaaS application, the Branch Gateway intercepts the DNS query, acts as a proxy, and forwards the query to the DNS server. You can allow the gateway to use the DNS server(s) learned from the ISP Internet Service Provider. An ISP is an organization that provides services for accessing and using the Internet. through DHCP Dynamic Host Configuration Protocol. A network protocol that enables a server to automatically assign an IP address to an IP-enabled device from a defined range of numbers configured for a given network. , or you can configure the DNS server for the SaaS application FQDNs by defining the DNS server for that uplink in the Exits table.
To configure the DNS server details:
- In the WebUI, set the filter to a group that contains at least one Branch Gateway.
The dashboard context for a group is displayed.
- Under , click > .
A list of gateways is displayed in the view.
- Click the Config icon.
The gateway group configuration page is displayed. The SaaS exit configuration is available in the Advanced Mode.
- Click > > .
- To add a new exit profile, click in the table.
- In the Uplink column, select an uplink from the drop-down list.
- In the DNS column, select one of the following options:
-
If you select , enter the DNS server IP address.
- Click .
Figure 1 Specifying DNS Server
For information about monitoring the SaaS application performance, see SaaS Express Monitoring Dashboards.
