Do you have a standard troubleshooting procedure for the “DNS Server Does Not respond” errors.
This happens 2-3 times weekly on one of our probes… it always seems to happen at around the same time – 8-9am. And we get a flood of around 50-60 sensors with this error.
We don’t see any DNS resolution issues at the same time
What kind of things can we use to narrow down the error e.g. for a particular sensor..? I can probably get wireshark installed on the machine.. so should I be looking for DNS queries that are not being replied to? Can you give me some idea of the code path that results in these error messages?... i.e. what the code expected to be able to do that failed (DNS lookup, TCP connectivity to device..)