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Total

DNS

Email

Security

Network

100

Availability

Domainniu.edu

IPv41

IPv60

MX records1

StatusActive

Domain technical report

Northern Illinois University | Your Future. Our Focus.

niu.edu

An education at NIU is more than just an academic degree. NIU opens the doors to career success, critical thinking, and lifelong learning. Find out how to apply today.

Generated: 2026-08-09T06:44:24-05:00 · Cached result

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IPv41

IPv60

MX1

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 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.

✓

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

89 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: www.niu.edu

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)

131.156.223.14

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

0 niu-edu.mail.protection.outlook.com.

TXT

15 record(s)

"google-site-verification=BiM7D1Nux9kZRaI-MwWrF8Hu11fDeVclorN5s3tjJns"
"docusign=f58976bc-f626-4232-8836-844e17ff7832"
"google-gws-recovery-domain-verification=62020772"
"rua=mailto:dmarc_agg@dmarc.everest.email"
"hkq6bl0v0cy3pb4g8z7f0vtvyc873vxr"
"google-site-verification=5cjSTz8DvO0x04PMYTFJcIbn-Rev9BFg8iNnE-HFPIU"
"MS=ms75199486"
"v=spf1 ip4:131.156.0.0/16 include:spf-a.niu.edu include:spf-b.niu.edu include:mh.blackboard.com -all"
"hibp-verify=dweb_r99aza50a2xwm44an13qtj2a"
"docusign=59eb093d-df34-43bc-83fb-3d7424734047"
"autodesk-domain-verification=hw6d-miT9ba8-WuZ8Kq9"
"docusign=92e291cf-fcfa-436a-a9d9-09700cf0ce3e"
"yahoo-verification-key=d+mIoTFMPS/Pt6HVp/QfdwRulbR/Kme78Efv+qGPBUE=" "google-site-verification=CC8fw8IUuQ-ytqvJShC6Q0hekjiiPXT_qRSVRRLpWXE"
"docusign=6a35ba1d-7ae3-4079-ac7a-9bd45439deb7"
"coursera-domain-verification=CzOrLEBvWzWWBLIhBdt5oXxWtTsDkZO7bhgMjSi5HZ7xgKiDc2G7nmHFpEIiDvz0"

NS

2 record(s)

dns-ext2.niu.edu.
dns-ext1.niu.edu.

SOA

1 record(s)

dns-ext1.niu.edu. empty.empty. 2024050821 3600 600 1209600 3600

SPF

Configured

v=spf1 ip4:131.156.0.0/16 include:spf-a.niu.edu include:spf-b.niu.edu include:mh.blackboard.com -all

DMARC

Configured

v=DMARC1; p=none; rua=mailto:dmarc_agg@dmarc.everest.email; ruf=mailto:dmarc_fr@dmarc.everest.email; fo=1; pct=100; rf=afrf

DKIM

Selector selector1

v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCyyhGYJ5Ok9cFJrvgivsXCuf6nLZKqwQbTQaP/FZheiPyE8s0Bwof5D6+DJ6AcInzmODERXZuU/5s6zo67SeDdKX+6jxxP+oXwy2Yf1K/gZ0BQmMdeaH+/KM7NR2LnJyoIDsnttrf0JMh4FjxuEE/0R4FUOURpdoIDLeIUESUwzwIDAQAB; n=1024,1450244812,1466056012

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Northern Illinois University | Your Future. Our Focus.

Description

An education at NIU is more than just an academic degree. NIU opens the doors to career success, critical thinking, and lifelong learning. Find out how to apply today.

Final URL

https://www.niu.edu/index.shtml

HTTP status

200

HTTP

Status

HTTP/1.1 200 OK

Final URL

https://www.niu.edu/index.shtml

Version

Server

Microsoft-IIS/10.0

X-Powered-By

ASP.NET

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

DigiCert Inc

*.niu.edu

Valid from

2025-10-14T19:00:00-05:00

Valid until

2026-11-06T17:59:59-06:00

Days remaining

Protocol

TLSv1.2

Cipher

ECDHE-RSA-AES128-GCM-SHA256

Security headers

1 active

✓

HSTSImplemented

—

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

131.156.223.14

40,62 ms

Cloudflare

1.1.1.1

131.156.223.14

44,17 ms

Quad9

9.9.9.9

131.156.223.14

56,94 ms

OpenDNS

208.67.222.222

131.156.223.14

46,12 ms

AdGuard

94.140.14.14

131.156.223.14

104,13 ms

IP, geolocation and ASNAssociated network information

131.156.223.14

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

niu-edu.mail.protection.outlook.com

Port 25: Closed/unreachable - 36.7 ms - 
Port 465: Closed/unreachable - 4044.5 ms - 
Port 587: Closed/unreachable - 4047.2 ms -

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