DNS Report: t.cn

Generated: 2026-08-09T04:04:05-05:00

69/100

Diagnostics

Status	Check	Points	Details
OK	IPv4 (A)	30/30	1 IPv4 address(es) detected.
OK	IPv6 (AAAA)	10/10	1 IPv6 address(es) detected.
OK	Name server redundancy	20/20	4 NS record(s); 2 or more required.
OK	SOA record	10/10	Authoritative zone record.
ERROR	DNSSEC chain	0/15	Both DS and DNSKEY are required.
ERROR	CAA policy	0/5	Certificate authority restriction.
OK	DNS propagation	10/10	Agreement between public resolvers.
OK	MX records	20/20	1 MX record(s).
ERROR	SPF	0/25	SPF policy not found.
ERROR	DMARC	0/25	DMARC policy not found.
ERROR	DKIM	0/20	No tested DKIM selector responded.
ERROR	MTA-STS	0/5	Mail transport policy.
ERROR	TLS-RPT	0/5	TLS reporting policy.
OK	Valid TLS certificate	55/55	143 day(s) remaining.
OK	Certificate lifetime	10/10	Full points require at least 30 days remaining.
WARNING	HTTP security headers	12/35	3 of 9 evaluated headers detected.
ERROR	PTR reverse DNS	0/30	PTR not detected.
WARNING	IPv4 diversity	20/35	Two or more IPv4 addresses receive full points.
OK	IPv6 connectivity	35/35	AAAA availability.
OK	DNS resolution	40/40	At least one address family must resolve.
OK	HTTP response	40/40	HTTP/2 200
OK	HTTPS final URL	20/20	Final URL uses HTTPS.

Tipo	Values
A	123.56.139.83
AAAA	2408:4000:200::3b4
CNAME
MX	10 mx.sina.net.
TXT
NS	ns4.sina.com.cn. ns1.sina.com.cn. ns3.sina.com.cn. ns2.sina.com.cn.
SOA	ns1.sina.com.cn. zhihao.staff.sina.com.cn. 1 28800 7200 604800 600
CAA
DS
DNSKEY
RRSIG	;; communications error to 69.64.44.20#53: timed out ;; communications error to 69.64.44.50#53: timed out ; <<>> DiG 9.18.39-0ubuntu0.22.04.4-Ubuntu <<>> t.cn RRSIG +short +time=1 +tries=1 ;; global options: +cmd ;; no servers could be reached
NSEC
NSEC3
SRV
NAPTR
TLSA
SSHFP