Harshith Mulky wrote:
>
> 1. How is Negative Caching Applied for other RCODES : FORMERR, SERVFAIL,
> REFUSED and NOTIMPL? What is the minimum TTL Value for these responses?
Good question: this isn't well specified. BIND has servfail-ttl (1s by
default) and lame-ttl (600s by default). The
Hello experts,
If a DNS server looks up a record and it's missing, it will often "negatively
cache" the fact that this record is missing, and not try to look it up again
for a while.
>From RFC 2308, Negative Caching of DNS Queries, I understood, the TTL for
>NXDOMAIN RCODE responses is taken
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