Configuring Pass-through Server

This section details the configuration steps for pass-through server using the Avi Load Balancer.

If an FQDN miss occurs on a DNS virtual service, the Avi Load Balancer can pass this request through load balancer to one or more back-end DNS servers. To enable this ability, configure a pool containing these servers, and attach this to the DNS virtual service.

If a domain filter is configured in the application filter of the virtual service, the pass-through is performed only for FQDNs falling within this subdomain. All other queries are dropped.

Unsupported queries are also forwarded to the pass-through server.

• Configure domain names hosted by the DNS virtual service. This step is optional.

From the CLI, create an Application Profile that selects the domain names hosted by this virtual service, on all Controller Clusters.

: > configure applicationprofile dns
: applicationprofile> type application_profile_type_dns
: applicationprofile> dns_service_profile
: applicationprofile:dns_service_profile> domain_names avi.com
: applicationprofile:dns_service_profile> save
: applicationprofile> save

From the UI or CLI, create an Application Profile that selects the domain names hosted by this virtual service.