Speaker
Mr
Kazunori Fujiwara
(Japan Registry Services Co., Ltd)
Description
JPRS observed that DS queries for JP registered domain names have
been increasing and 3.5% of queries are qtype DS now. This report
presents current status of JP queries, the reason of increasing DS
queries, possible situations in the future and some idea of
countermeasures for this phenomena.
The reason of increasing DS queries is the following. An unsigned
domain name does not have a DS RR in its TLD zone. NCACHE TTL is
smaller than normal RR TTL in many TLDs. DNSSEC validators need to
know DS RR existence for each query name. As a result, each DNSSEC
validator may send DS queries for TLD DNS servers one zone cut per NCACHE
TTL seconds.
Primary author
Mr
Kazunori Fujiwara
(Japan Registry Services Co., Ltd)
