DNS Report: icourse163.org

Generated: 2026-08-10T16:48:31-05:00

71/100

Diagnostics

StatusCheckPointsDetails
OKIPv4 (A)30/301 IPv4 address(es) detected.
ERRORIPv6 (AAAA)0/100 IPv6 address(es) detected.
OKName server redundancy20/207 NS record(s); 2 or more required.
OKSOA record10/10Authoritative zone record.
ERRORDNSSEC chain0/15Both DS and DNSKEY are required.
ERRORCAA policy0/5Certificate authority restriction.
OKDNS propagation10/10Agreement between public resolvers.
OKMX records20/201 MX record(s).
OKSPF25/25SPF policy published.
OKDMARC25/25DMARC policy published.
ERRORDKIM0/20No tested DKIM selector responded.
ERRORMTA-STS0/5Mail transport policy.
ERRORTLS-RPT0/5TLS reporting policy.
OKValid TLS certificate55/55121 day(s) remaining.
OKCertificate lifetime10/10Full points require at least 30 days remaining.
WARNINGHTTP security headers4/351 of 9 evaluated headers detected.
ERRORPTR reverse DNS0/30PTR not detected.
WARNINGIPv4 diversity20/35Two or more IPv4 addresses receive full points.
ERRORIPv6 connectivity0/35AAAA availability.
OKDNS resolution40/40At least one address family must resolve.
OKHTTP response40/40HTTP/2 200
OKHTTPS final URL20/20Final URL uses HTTPS.

DNS Records

TipoValues
A
111.124.200.109
AAAA
CNAME
MX
10 mx.ym.163.com.
TXT
"v=spf1 include:spf.mail.163.com include:spf.163.com ~all"
NS
ns8.nease.net.
ns5.nease.net.
ns6.nease.net.
ns4.nease.net.
ns3.nease.net.
ns2.nease.net.
ns1.nease.net.
SOA
ns4.nease.net. admin.nease.net. 20130974 7200 1800 1209600 60
CAA
DS
DNSKEY
RRSIG
NSEC
NSEC3
SRV
NAPTR
TLSA
SSHFP