filter.furrera.ps has no CNAME records.
Question and response
Question
dig filter.furrera.ps. NS
Answer
The response has no answer records.
Authority
furrera.ps. 3339 SOA ns1.furrera.ps. sys.furrera.ps.furrera.ps. 2025112698 14400 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0