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Total

DNS

Email

Security

Network

100

Availability

Domaincau.edu.cn

IPv41

IPv60

MX records3

StatusActive

Domain technical report

中国农业大学

cau.edu.cn

Generated: 2026-08-10T18:52:18-05:00 · Cached result

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IPv41

IPv60

MX3

NS2

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

2 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

✓

DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

3 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

47 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: \@.cau.edu.cn

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 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)

202.205.80.179

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

3 record(s)

5 gw1.cau.edu.cn.
5 gw2.cau.edu.cn.
3 mx-cau-edu-cn.icoremail.net.

TXT

3 record(s)

"google-site-verification=Y9Zg-qVkdizAGjyp9hXIofB3roPPDIxBmbGg83d51ig"
"google-site-verification=Iya0Br1NJ3a9kQ9tKysvfkSKm5DZLBEON2CTHmAoMWA"
"v=spf1 mx ip4:211.82.93.128 ip4:211.82.93.129 ip4:211.82.95.94 ip4:211.82.93.96 ip4:211.82.95.95 ip4:211.82.93.97 ip4:114.251.217.111 ip4:114.251.217.10 ip4:114.251.217.13  ip6:2001:250:209:B02::173  include:spf.icoremail.net -all"

NS

2 record(s)

nsb.cau.edu.cn.
ns.cau.edu.cn.

SOA

1 record(s)

ns.cau.edu.cn. root.ns.cau.edu.cn. 2100054551 10800 300 604800 86400

CAA

0 record(s)

—

Not configured

DS

1 record(s)

22270 8 2 A5A213350D23B0287725A17BF22890E01CB3C70C9D0A9698D165EC83 D89BCACC

DNSKEY

2 record(s)

256 3 8 AwEAAeUqud4Wz/v0x6RVE2zFdP69HS6pPpnq4a18dKpRbfbsKH9YSXUK i1yFLk81YVo9lXvi/TJ4b2yejN3cTEUDtL8MDorMQtNIkRsi+Up1pq4G oJuAAVivKeHA76OTQEdW/PdicyWxmS5DDhkfg2YkSZQqQXXDIvNif/7z Lr+QeoTPUlero/GUgqNV90gKFF2x8gFS9UsNon4z7nbxc1UHzvQVThdb xlpwhja7u2ays3u8/7Hwm75LSDHPm7u8MDsSti7suncpr+kt+9TvH8Lz /r/ZOApfdR88aSm8j23z1nuTdULrmEaWBJAyGibrl57ibc2FsgYTTczJ Dwz+5sYS2wc=
257 3 8 AwEAAdiZ4zx+b8K4PBN6ZkYNvm6k1GW8jtBm65aPEYCWwAFhq5b3D9w4 NBpjPsCDz9qK6u/Lgw5+Apa8QhaYW+FSuGr4EGvo5BjYFQIiR9Upsf/g l+sw7/xWJM7OaglgBR6HmBhhvGS0VQV/26T+s/CIp2c8ievq959hQQ6L 28cvQmH1MMlC3GYrVedVRF8fCiHyJ88SGWzFOKRUNkk/sY8fnc2N4qr/ 9oGQA2Zs1vSWqn8ZaMPPgVnh3HuQMd35uPI8guxKqrduDVAsShNVRsGo RG7pSvfUbZ93fFVfpXnTb+12TY5GcD8x6P+S2kQC7TYPSOHxdcvh4Zwx 2F70yuUd+8k=

RRSIG

10 record(s)

A 8 3 3600 20260827003747 20260728001738 4251 cau.edu.cn. hCLqQXzpsOOJx5KKuIMcIOBlx+pOe4biyh52TEW2nx6fsXplss/q9/vH WzaPiA1Vbq7K+R6BQEBsmVuElDBgtEuSWFto6eDtojktCvoNanFW8YcA fa+Tce6C1voB6YmelTNBLDVtIgdsMLTwXeEadNFDmsI2dbI1Ie+pTsdm zRF5HqPcwLjqr4fezbGzr0DETlmhyrrJMwU1AxdUXYqRey8U8aejTtf8 jx7BT7k7tF8JmBd4etXOj22zIcGq+O5F0BxyLOkt5CB0y7FvSKv9apjQ VULoQavmKBNHjiZWFtA8/REf/DBF1jak/fGHz9O8LSQxHAKW5bM70+OP mPQMHw==
NS 8 3 3600 20260827003747 20260728001738 4251 cau.edu.cn. WRZPFXSIdWk/m1nGRY+baAZFnAR3hN7XjRg22RoPnoZt+0cIHPamZIFH w95q0EWkk+PPVnKbx3jtWlzpHQ67kHMGsuYHtrOgn5mrUoqgcCP8DMxd dva0CAyFox58cV16ZjcHI4FONMseGMA66zeYx2qtuGGigognljMtCEOD QacYesoh7ixmxUN5B38sn+SkWbRFVygi+WQxGev+ZQq0M65VRhuaL5jo ZsVTVpSL2zS5EdbYWaYtzcX8IOYv04LjICIYgpt49foMzO9OyVHEMgiZ fmcmxSu0YPTkSciUlbOxkS79+db+n6+Ma7Eaa64vMR6oO/SuRQy6HmES /5Q4Yw==
SOA 8 3 3600 20260909215651 20260810205651 4251 cau.edu.cn. hVFEtmpwe6w+MDGRXDxrKxI+jKya+S7QGOFVqANh07/x6UTb8soEynmg DoVlh+k/NmUUavSnrbZ00uWmnuS45nokJmmNXOCabPQPF/jywPm9qS+6 VZ1OpkqlOqHV1ncmhQ5xxsdFW8n3CiqJ/adAGhcjAb8/KrlufHNOd+ia RcL2vEOEG3Fsc1lf88AiD33oHmNWJvBkn2pnJyDTUgDuAOSYXclnHjSf 4tZowZVTG0+DKRFmK3UqLtw1U6/OXgeDFwJZFHK486xqJ+jZQxUGnmte RHdB4dlf7fKF5a5NgvnPgVmoDMFB831mS3g/8L1zW/Syqm9B5WSUZyzp hZ+rJQ==
DNSKEY 8 3 3600 20260821233406 20260722232448 4251 cau.edu.cn. XOSfIHZ7ubVOOAy0s4jYz0s1Pxx4e1/NSRWbdOpUnV+yS9kGHddB2nMh jI4oTeQWFWCJkhXOBDpNpe+SApMsAiv23ZnVxoiXadrQrkkG2hI1LVN1 S2/LfMWWziogcW4v3iyU25U6XNVAOfPfjC/nCHilxcSO/wdE+mX+8P+f zVVMjd5MvoVC2yKNcWJf8f79IRfu9nuwim15CKicd8AaY7hwmFGfM34h /4Iu+dXmPj6LgyzWEC9qDSgff41nAjXsMgG5h8jkzwLQRAnAsFMfHItJ 2x//AukZ3rqdfL+MkXDuA+HdlzQLMawX2OkKZ5ZDqjFiA4vPvZYNmLkr v5Y0Yw==
DNSKEY 8 3 3600 20260821233406 20260722232448 22270 cau.edu.cn. TXpwk17ReOL0uy+nlFGc70ks2hgM2j6DjFkq7p8oK7TAVwdPyyq3pRuV S8N+M0bP4mZ1SHnIrh2znM+G3AR9hAfC6mdWSIDWKaE73CTKfg274STf 9cm7gO6W3efUvNkgkwTxYuBS7a/uNnUdtrHUkqBqxlyrFKJaC5w5pTvN pw/rZf5FMwn/BzTLFICxR/eQIqqU7qSJgu32AGFNwC+Gpk0OL4vM7Y2Q VSnOCCMnguyNDLxbhE7jLF8vEZwkCbrKjc2JCeJ0PcJ/97wrdSIj7BcJ P5gnHyc0zlhssD6M9y5bYZqBAnS96mWzCGouiD+gqzYY1UtNsnuaGwda z5nz4g==
TXT 8 3 3600 20260827003747 20260728001738 4251 cau.edu.cn. aLwBA8sndeEhEu6OMDge3ph9W3SYC4ffvnUQYwL64TbC9ER7Jq06QRED UCYMyzcugGT7Xpbz7KY7yOursIlYxfqdcSIkYDVXhDfLRKAExtuD5oMz XdU8zI9apkAFgVR8JzjZ/4v0XB4BJKVcKkeo0gjytA0djuCv1H86Sm2K nkL+v8UDZ78OsI8e+/WC9iMbCPezBaaUtgabAwMfLv8utY/BPxmsj0Lm kGCtUMU8tIhy3+Md6TJNGpy5DSUTHEushpyOMyBqVoA+FQXvni0hHVRq qYCyJPHBZK4LhSF8r6tGwVP6U/VBDjrbLA2f/NTbHH4sintSDYldk1kQ FHtXLg==
MX 8 3 3600 20260827003747 20260728001738 4251 cau.edu.cn. QuuKttibVWKf8fnVpgpAToZlo+aKx3J1OT9lhVqNagEdTTQhQvPFQU/w C0XCzaOdDLXpcIVmuu+fSlIB8bVZktVhMqVm7TaYIWLasbsLlkVw2WuS b40vW7y1e7ZX9oI/oCfPsbPrGNs8z9BHO9hvAdjPzN11LLwVv2tNglY0 MVMaqIClyL3UBfvdBAuepIChOKJcZWSd0ijDPwHihsgSUTiADpVXFzFu ZmolNqwQeJb0fSjtShaRy9SQxHtAyhgzfDzZmTB3vmpOQwRF42IIZUP+ tr2LJDGbA4sga67dO1Wg6dsKINZSbWmjtvfd9LHeqWL0g0Q/hUszSDpx sty0AA==
DS 8 3 172800 20260818145404 20260804141213 44583 edu.cn. l31720QaDLY4qRrJiMe2NQNG8Y1c2x/wHWdFlkCTUoI6zK68G+dcYcT9 ZuRezf9QW1rl3SCQ66/pOIybFmrKaC9uRt25zogz4lDmIwlkd5sYZKq0 EE4U9eVBafasBoDyEWw+8+mAIOsAQrmkX1cszwj+nmUQfzeHT6+xTvEj Jjwsi7LEfMW3bEOq7gsXOa3HTPwgDwwd2a+gln9wAXnYnjKMrte0dmew rkuBtBA1tD7qDcEN51/z4yz0BLD0reijyqwcju/nzgVylgUAP/+UpLrr iVRzMgXFQv96ag59a8LfiEAvLcAlgvm8kqmYBFpo1CHMxtnPmpSFtiH+ BA420Q==
TYPE65534 8 3 0 20260820013800 20260721010118 4251 cau.edu.cn. ksFw0a90/kIiIVR+JST3uJ0upqhfHSZEVcKLqnbpfn5okRh7g6YNoE5o c479tqwfB+qx6jBIn6938JpiyW2xwjMYT6iSHuPSI7Gf164/S4ejZLv0 Qlz4Av0XwFQDfcobarRBAn9fI2F9kaQOCZHm9o1LHce/DM69MBDgW90H hq+lOa1QtBNuR75zMoaKonT3KiDWk0a2ZS3CYaz1nrXXTb5IlJ80BlUH Jw1V7kRDj/HirOTOX83lIHZotdi+ryATMfTGaKfiKQnY0j+gPENsS1Li 9ndId7ZwJMmyow9bkRfe/cHTIjPthEQnGr8IvoEMRRACjFwtq4lObVKQ RRzURg==
NSEC3PARAM 8 3 0 20260824080607 20260725074318 4251 cau.edu.cn. H+DKCJLtBYSJJ1aM11j3dwB5AY6+qgrwyFepytvwZfmpzwjkW9C83S7k Le0khGQhfOPerGfmu/lKsDf+HSsVJCPSmxW8NC4TSVpxMRGpl7PvtwQz Zgan0JTlfjMsqfAiNire+KPxpejUD9Axgovoo3EV0Pr2kZO0FAoj2vIY 7RUUqfHmTSIgDj0oM6KgTg5GTWXzWWWh0tn/Ny6EQlRbyCgADOnMyPq9 qzpjYJKGChYSltABmHEsZ6NrAmppgQaulxSQ6GAQLY66wxzQD9SfwS2r 69KoE69Y1UVqbhx2uE4mIcFQ929j0u/TibVoXAoSgaatvDmH1mQYO03D VABSag==

NSEC

0 record(s)

—

Not configured

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

0 record(s)

—

Not configured

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 mx ip4:211.82.93.128 ip4:211.82.93.129 ip4:211.82.95.94 ip4:211.82.93.96 ip4:211.82.95.95 ip4:211.82.93.97 ip4:114.251.217.111 ip4:114.251.217.10 ip4:114.251.217.13  ip6:2001:250:209:B02::173  include:spf.icoremail.net -all

DMARC

Configured

v=DMARC1;p=none;ruf=mailto:dmarc@cau.edu.cn;rua=mailto:dmarc_report@cau.edu.cn

DKIM

Selector dkim

k=rsa;d=cau.edu.cn;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCMs3RrLHVrgHV6dRTxrdmXH/yb/fjTToUr82xvgwyvLX2j09oqoCgi3a/tfGtqxz2XPpxyUYTN1VXtiTRPoVJrsjxa0xyeqN9bQJbWSjaZYxCC6RR2sMdV12iyklw3c6yjqjseAxGh+BHHHes46VdPdnWTinE8RGIosxmNCw7bQIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

中国农业大学

Description

Final URL

https://cau.edu.cn/

HTTP status

206

HTTP

Status

HTTP/1.1 200 OK

Final URL

https://cau.edu.cn/

Version

Server

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

GlobalSign nv-sa

*.cau.edu.cn

Valid from

2025-08-25T22:53:41-05:00

Valid until

2026-09-26T22:53:40-05:00

Days remaining

Protocol

TLSv1.2

Cipher

ECDHE-RSA-AES256-GCM-SHA384

Security headers

0 active

—

HSTSNot detected

—

Content Security PolicyNot detected

—

X-Content-Type-OptionsNot detected

—

X-Frame-OptionsNot detected

—

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

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

202.205.80.179

40,73 ms

Cloudflare

1.1.1.1

202.205.80.179

247,74 ms

Quad9

9.9.9.9

202.205.80.179

50,83 ms

OpenDNS

208.67.222.222

202.205.80.179

1.081,49 ms

AdGuard

94.140.14.14

202.205.80.179

40,93 ms

IP, geolocation and ASNAssociated network information

202.205.80.179

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

gw1.cau.edu.cn

Port 25: Closed/unreachable - 247.4 ms - 
Port 465: Closed/unreachable - 480 ms - 
Port 587: Closed/unreachable - 4008.6 ms -

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