DNS Synthetic Extension

[SureshThakur]

Hi,

Can someone explain how DNS synthetic extension works in background.  Synthetic monitor DNS monitoring & observability | Dynatrace Hub

What exactly it checks and what network connectivity is required from AG server to DNS server. Do we need connectivity on any specific port?

Thanks 
Suresh

[AntonioSousa · Accepted solution]

Have not used it, bust certainly you should need connectivity on port 53, for UDP traffic. It will make UDP/53 requests and give you performance & availability metrics.

Don't forget that you already have DNS metrics with OneAGent, for every server being measured. Check out Data Explorer for DNS metrics, as they really represent the real DNS traffic going on in your servers.

[mark_bley]

Just to expand a bit on what Antonio said, it uses dnspython to query and test for nameservers.