DNS Resolution

The controller and AP handle DNS resolution (mapping of the host name to an IP address) at runtime for third-party login support. DNS resolution is handled by the AP for B@AP topologies and handled by the controller for B@AC and Routed topologies.

First, configure a host name pattern in the Custom Application dialog as part of the Layer 7 filter configuration. The ExtremeWireless data plane inspects DNS replies for host name patterns that match the user-configured patterns. When a match is found, the host name IP pair is stored in the database. The data plane only considers the user-configured patterns when inspecting the DNS reply.

For example, the pattern facebook.com matches any string that ends with “facebook.com”. Valid matches include any.facebook.com and 1.any.2.facboook.com. Patterns that do not match include: facebook.org.com.

A single host name supports multiple IP addresses. The data plane reserves space for up to 128 IP addresses per host name.