Domain technical report
中南大学
csu.edu.cn
IPv41
IPv61
MX1
NS3
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85
Total
85
DNS
90
Email
69
Security
85
Network
100
Availability
Domaincsu.edu.cn
IPv41
IPv61
MX records1
StatusActive
DiagnosticsMain findings and recommendations
IPv4 (A)30 / 30 pts · Dns
1 IPv4 address(es) detected.
IPv6 (AAAA)10 / 10 pts · Dns
1 IPv6 address(es) detected.
Name server redundancy20 / 20 pts · Dns
3 NS record(s); 2 or more required.
SOA record10 / 10 pts · Dns
Authoritative zone record.
DNSSEC chain0 / 15 pts · Dns
Both DS and DNSKEY are required.
CAA policy5 / 5 pts · Dns
Certificate authority restriction.
DNS propagation10 / 10 pts · Dns
Agreement between public resolvers.
MX records20 / 20 pts · Mail
1 MX record(s).
SPF25 / 25 pts · Mail
SPF policy published.
DMARC25 / 25 pts · Mail
DMARC policy published.
DKIM20 / 20 pts · Mail
A DKIM selector was verified.
MTA-STS0 / 5 pts · Mail
Mail transport policy.
TLS-RPT0 / 5 pts · Mail
TLS reporting policy.
Valid TLS certificate55 / 55 pts · Security
130 day(s) remaining.
Certificate lifetime10 / 10 pts · Security
Full points require at least 30 days remaining.
HTTP security headers4 / 35 pts · Security
1 of 9 evaluated headers detected.
PTR reverse DNS30 / 30 pts · Network
PTR: news.csu.edu.cn
IPv4 diversity20 / 35 pts · Network
Two or more IPv4 addresses receive full points.
IPv6 connectivity35 / 35 pts · Network
AAAA availability.
DNS resolution40 / 40 pts · Availability
At least one address family must resolve.
HTTP response40 / 40 pts · Availability
HTTP/1.1 200 OK
HTTPS final URL20 / 20 pts · Availability
Final URL uses HTTPS.
DNS and emailPublished records and email configuration
A
1 record(s)202.197.61.57
AAAA
1 record(s)2001:250:4400:64::57
CNAME
0 record(s)—
Not configured
MX
1 record(s)10 mail.csu.edu.cn.
TXT
2 record(s)"v=spf1 ip4:202.197.64.20 ip4:202.197.64.21 ip4:222.247.53.83 ip6:2001:250:4400:64:202:197:64:20 include:spf.icoremail.net -all" "brevo-code:b1414e0a234265a2faa294058248ae06"
NS
3 record(s)csu-6.csu.edu.cn. csu-7.csu.edu.cn. csu-8.csu.edu.cn.
SOA
2 record(s);; communications error to 69.64.44.20#53: timed out ns.csu.edu.cn. hostmaster.f51.its.csu.edu.cn. 2024101475 10800 3600 604800 60
CAA
1 record(s);; communications error to 69.64.44.20#53: timed out
DS
0 record(s)—
Not configured
DNSKEY
2 record(s)256 3 7 AwEAAcAOi6jf1yYwV81lREkLOIVaKMvJ3VVMnewhyFXcGnNd+jHcnc5k cxbjS3WYKI3YOTIB3xPn6llVKGx3O/P+o+LwEoTaJcLSBJnswvVyK+vC GWIYxRhqr3+SJkQ2y5CUZwKkBWhmhw8P4/g1n1hOpi1OMgWzrcQm3vab VTi0cVfN 257 3 7 AwEAAb6KaurXgzzso/cleV4AJVWsgyiTfp55Sa7+i511CRLkLuMnFpo5 bBJJODaXM7O1RY+6k4Ee0IWOVmDmgDckFotSA+WGqt4erWBs4dFhjqBX d59mqdrfWtqPzOxKAgjJcpXS3zDGptKlaT5n34BBWT2PF04RKnnsVmeB +huIVNYX
RRSIG
2 record(s)MX 7 3 60 20260828035317 20260807035317 21842 csu.edu.cn. vjKiKj6cyECd/Dk60dPzaHAAnEA9dLgURXmjUPo7SLgUyAluoPTNHeM9 w7APQOl991LFDu3iQqa2c7WM9pKkLmIzHc8YAhbMFIzbH63l97XMsN4I gVx+3yF4B8vkNZT4qsy1on99XhQ3su8Be6mQYZIAfTcPEqtJuKcPD9rM kZc= NS 7 3 3600 20260828035317 20260807035317 21842 csu.edu.cn. v0Z8yWBYNOzVtmjlgyCX2AcxYek9cj5NBGbPOVIrJSdNvC7OuMEvWlKy zO7vL5KQkHFxSr4BgeJhjkr2aGZakdKj6eNiqz8por2bqyYPY1tdCaRn E7WOVzM5d+mrrlnEff+6aQF72+bjE8bDTNMUzw7YAfIGE9Wa4QT5KUeN zrI=
NSEC
0 record(s)—
Not configured
NSEC3
1 record(s);; communications error to 69.64.44.20#53: timed out
SRV
1 record(s);; communications error to 69.64.44.20#53: timed out
NAPTR
0 record(s)—
Not configured
TLSA
0 record(s)—
Not configured
SSHFP
0 record(s)—
Not configured
SPF
Configuredv=spf1 ip4:202.197.64.20 ip4:202.197.64.21 ip4:222.247.53.83 ip6:2001:250:4400:64:202:197:64:20 include:spf.icoremail.net -all
DMARC
Configuredv=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com,mailto:dmarc@csu.edu.cn
DKIM
Selector dkimk=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA9GSuCJCV+Oq5bPPFjGOUImc/lodaytB7HfEQVH7S0QY1ArrYP/oPnhMPslXMes5dVEQmzm96ZTGwS8PkGtJhhgeKJSbIWLVCHHwosHRgY/Ly7rQUxgI+Z1h7NY36siizSYvp0DK/sgGEidm9kQm
Analyzed webpageMetadata and HTTP response
Title and description
ExtractedTitle
中南大学
Description
Final URL
https://www.csu.edu.cn/index.htm
HTTP status
206
HTTP
Status
HTTP/1.1 200 OK
Final URL
https://www.csu.edu.cn/index.htm
Version
2
Server
*********
X-Powered-By
SSL and HTTP securityCertificate, protocol and security headers
SSL certificate
AvailableAvailable
Yes
Issuer
WoTrus CA Limited
CN
*.csu.edu.cn
Valid from
2025-11-19T04:44:34-06:00
Valid until
2026-12-19T04:44:33-06:00
Days remaining
130
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256
Security headers
1 activeHSTSNot detected
Content Security PolicyNot detected
X-Content-Type-OptionsNot detected
X-Frame-OptionsImplemented
Referrer PolicyNot detected
Permissions PolicyNot detected
Cross-Origin-Opener-PolicyNot detected
Cross-Origin-Embedder-PolicyNot detected
Cross-Origin-Resource-PolicyNot detected
DNS propagationComparison across public resolvers
Public resolver comparison
ConsistentConsistent propagation
5 public resolvers queried.
ResolverServerResultLatency
Google
8.8.8.8202.197.61.57
292,98 ms
Cloudflare
1.1.1.1202.197.61.57
929,85 ms
Quad9
9.9.9.9202.197.61.57
412,04 ms
OpenDNS
208.67.222.222202.197.61.57
1.580,55 ms
AdGuard
94.140.14.14202.197.61.57
928,75 ms
IP, geolocation and ASNAssociated network information
202.197.61.57
No datasuccess
No
country
region
city
asn
organization
isp
Visitor information
Visitorip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No
SMTPEmail port connectivity
mail.csu.edu.cn
Port 25: Closed/unreachable - 271.6 ms - Port 465: Closed/unreachable - 518.6 ms - Port 587: Closed/unreachable - 5064 ms -