Solutions

About the health check for custom DNS groups

Solutions ID:    KB4900
Version:    1.0
Status:    Published
Published date:    01/29/2012
 

Problem Description

About the health check for custom DNS groups

Resolution

Each time you add a DNS server to a group, the ProxySG automatically creates a DNS health check for that server IP address and uses a default configuration for the health check.

For example, if you add a DNS server to a primary or alternate DNS group, the created health check has a default hostname of www.bluecoat.com.

If you add a DNS server to a custom group, the longest domain name is used as the default hostname for the health check (in the following example test.griccia.local is the domain for the internal custom group)

DNS Health checks configuration

 

From a packet Capture we can see the two default health checks for the primary and for the internal group.

Packet capture DNS health checks

 

The default hostname for DNS health checks can be modified from Management Console in: Configuration -> Health Checks -> General -> Health Checks

 

Health check configuration


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