A coredns plugin that returns a SERVFAIL with the Authoritative and RecursionAvailable flags set.
Usage:
Add the following to plugins.cfg, before debug:
servfail:github.com/nicelocal/servfail
And use the following example Corefile:
. {
servfail
}
Example dockerfile:
FROM golang
RUN git clone -b v1.12.0 --depth 1 https://github.com/coredns/coredns /coredns && \
cd /coredns && \
sed '/bind:bind/a servfail:github.com/nicelocal/servfail' plugin.cfg -i && \
make
FROM scratch
COPY --from=0 /coredns/coredns /coredns
ENTRYPOINT ["/coredns"]