DNS Report: sdu.edu.cn

Generated: 2026-08-09T17:30:45-05:00

71/100

Diagnostics

StatusCheckPointsDetails
OKIPv4 (A)30/303 IPv4 address(es) detected.
ERRORIPv6 (AAAA)0/100 IPv6 address(es) detected.
OKName server redundancy20/203 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 records20/202 MX record(s).
OKSPF25/25SPF policy published.
ERRORDMARC0/25DMARC policy not found.
ERRORDKIM0/20No tested DKIM selector responded.
ERRORMTA-STS0/5Mail transport policy.
ERRORTLS-RPT0/5TLS reporting policy.
OKValid TLS certificate55/55246 day(s) remaining.
OKCertificate lifetime10/10Full points require at least 30 days remaining.
WARNINGHTTP security headers4/351 of 9 evaluated headers detected.
OKPTR reverse DNS30/30PTR: sdu.edu.cn
OKIPv4 diversity35/35Two or more IPv4 addresses receive full points.
ERRORIPv6 connectivity0/35AAAA availability.
OKDNS resolution40/40At least one address family must resolve.
OKHTTP response40/40HTTP/1.1 200
OKHTTPS final URL20/20Final URL uses HTTPS.

DNS Records

TipoValues
A
211.86.56.247
202.194.15.6
202.194.14.6
AAAA
CNAME
MX
5 mx-sdu-edu-cn.icoremail.net.
10 sdu.edu.cn.
TXT
"_yxei1p4rs4wrzu1xkjc21adqzpy1kve"
"v=spf1 ip4:202.194.15.6 ip4:202.194.14.6 ip4:211.86.56.247 include:spf.icoremail.net -all"
"adobe-idp-site-verification=cef8bf80d248a94fa8b062412bf40df7a25445b49d5aac2d1eb7a642700bc455"
NS
sdunetsv3.sdu.edu.cn.
sdunetsv2.sdu.edu.cn.
sdunetnms.sdu.edu.cn.
SOA
ns.sdu.edu.cn. mail.sdu.edu.cn. 1325 28800 3600 604800 1800
CAA
DS
DNSKEY
RRSIG
NSEC
NSEC3
SRV
NAPTR
TLSA
SSHFP