ftp.furfling.com has no CNAME records.
Question and response
Question
dig ftp.furfling.com. NS
Answer
The response has no answer records.
Authority
furfling.com. 3208 SOA ns1.way3.com. dnsadmin.way3.com. 2025091633 3600 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0