What is the DNS health check behavior for non-responding DNS server configured on ProxySG?
When a DNS server is not responding, and the DNS health check has not detected the DNS server as down, the ProxySG will retry on the same DNS server four times, at 5, 10, 20, and 40 seconds, and timeout after 80 seconds. These values are not configurable, and are the same for forward and reverse DNS lookups.
Please note that the ProxySG will not wait all this time before failing-over the request to the next DNS server configured.
Imported Document ID: 000015435
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