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71
Total
70
DNS
70
Email
69
Security
20
Network
100
Availability
Domainicourse163.org
IPv41
IPv60
MX records1
StatusActive
Domain technical report

中国大学MOOC_优质在线课程学习平台

icourse163.org

中国大学MOOC(慕课) 是爱课程网携手网易云课堂打造的在线学习平台，每一个有提升愿望的人，都可以在这里学习中国优质的大学课程，学完还能获得认证证书。中国大学MOOC是国内优质的中文MOOC学习平台，拥有众多985高校的大学课程，与名师零距离。

Generated: 2026-08-10T16:48:31-05:00 · Cached result

JSONCSVPDFVisit site
IPv41
IPv60
MX1
NS7

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

7 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 policy0 / 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.

!
DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

121 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers4 / 35 pts · Security

1 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

i
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/2 200

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
111.124.200.109

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
10 mx.ym.163.com.

TXT

1 record(s)
"v=spf1 include:spf.mail.163.com include:spf.163.com ~all"

NS

7 record(s)
ns8.nease.net.
ns5.nease.net.
ns6.nease.net.
ns4.nease.net.
ns3.nease.net.
ns2.nease.net.
ns1.nease.net.

SOA

1 record(s)
ns4.nease.net. admin.nease.net. 20130974 7200 1800 1209600 60

CAA

0 record(s)
—

Not configured

DS

0 record(s)
—

Not configured

DNSKEY

0 record(s)
—

Not configured

RRSIG

0 record(s)
—

Not configured

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 include:spf.mail.163.com include:spf.163.com ~all

DMARC

Configured
v=DMARC1;p=none;fo=1;ruf=mailto:dmarc@qiye.163.com; rua=mailto:dmarc_report@qiye.163.com

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
中国大学MOOC_优质在线课程学习平台
Description
中国大学MOOC(慕课) 是爱课程网携手网易云课堂打造的在线学习平台，每一个有提升愿望的人，都可以在这里学习中国优质的大学课程，学完还能获得认证证书。中国大学MOOC是国内优质的中文MOOC学习平台，拥有众多985高校的大学课程，与名师零距离。
Final URL
https://www.icourse163.org/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.icourse163.org/
Version
3
Server
YDWS
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
DigiCert, Inc.
CN
*.icourse163.org
Valid from
2026-05-24T19:00:00-05:00
Valid until
2026-12-09T17:59:59-06:00
Days remaining
121
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

1 active
—
HSTSNot detected
✓
Content Security PolicyImplemented
—
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
111.124.200.109
337,47 ms
Cloudflare
1.1.1.1
111.124.200.109
605,85 ms
Quad9
9.9.9.9
111.124.200.109
303,60 ms
OpenDNS
208.67.222.222
111.124.200.109
1.000,85 ms
AdGuard
94.140.14.14
111.124.200.109
648,21 ms

IP, geolocation and ASNAssociated network information

111.124.200.109

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
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

mx.ym.163.com

Port 25: Closed/unreachable - 59.8 ms - 
Port 465: Closed/unreachable - 268.4 ms - 
Port 587: Closed/unreachable - 210.7 ms - 220 gyproxy-mx2-ym-entmail-virt132.gy.ntes ESMTP ready

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