I was asked to assist in debugging a strange issue involving a BIND resolver: seemingly correlating with an upgrade to Debian 10 a while ago, the chaps were reporting that their 9.11.5 BIND resolvers where responding with impossible TTLs on NOERROR/NODATA responses. My answer: nope – can’t happen.
We recently released a new version of Cloudflare Resolver which adds a piece of information called “Extended DNS Errors” (EDE) along with the response code under certain circumstances. This will be helpful in tracing DNS resolution errors and figuring out what went wrong behind the scenes.
kube-iptables-tailer is a service that gives you better visibility on networking issues in your Kubernetes cluster by detecting the traffic denied by iptables and surfacing corresponding information to the affected Pods via Kubernetes events.
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