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Total

DNS

Email

Security

Network

100

Availability

Domaindiw.de

IPv41

IPv60

MX records1

StatusActive

Domain technical report

diw.de

Generated: 2026-08-10T15:44:37-05:00 · Cached result

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IPv41

IPv60

MX1

NS3

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

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

186 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: formdata.diw.de

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)

195.90.218.113

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

0 diw-de.mail.protection.outlook.com.

TXT

4 record(s)

"apple-domain-verification=4V8rGV5u89tZuXjs"
"HARICA-KS6eMQEV7B0snItRzDR"
"linkedin-site-verification=f52e6b05-e986-4f0a-810f-a7177f3f7e4a"
"v=spf1 mx include:spf.protection.outlook.com ip4:193.174.142.20 ip4:193.174.141.161 ip4:193.174.141.162 " " ip4:193.174.141.120 ip4:193.174.141.121 ip4:193.174.141.122 ip4:193.174.142.69 ip4:193.174.141.140 -all"

NS

3 record(s)

deneb.dfn.de.
dns2.diw.de.
dns1.diw.de.

SOA

1 record(s)

dns1.diw.de. server-admins.diw.de. 2026080401 21600 7200 1800000 86400

CAA

4 record(s)

0 issue "pki.dfn.de"
0 issue "sectigo.com"
0 iodef "mailto:hostmaster@diw.de"
0 issue "harica.gr"

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 mx include:spf.protection.outlook.com ip4:193.174.142.20 ip4:193.174.141.161 ip4:193.174.141.162  ip4:193.174.141.120 ip4:193.174.141.121 ip4:193.174.141.122 ip4:193.174.142.69 ip4:193.174.141.140 -all

DMARC

Configured

v=DMARC1; p=reject; sp=none; pct=100; rua=mailto:m365-alerts@diw.de

DKIM

Selector selector1

v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2dqS1qLYPg21MHzbA1LaiR/4PnlkC9sqOESAqjjketPXGfveZNZL4YHRXKgNhk+pGlees9e6nKVJYd882j2+RBwPYnpH9LoT8/jDgngHyB2lsqQIZ92/f1mtI8XQr2U75SmV2UjHfN4VUSYxd2rzNwe7odR/n3G54UP9oipW8RST7pXLJ3LGk1X6JA15a2lOheALPcWfLYjxwRAJpbdoMG79mcGiMNDOHNLrFpncwxz3E9+D74wl5lQQdATCtntN6/uyV9oibWWuOFaEZ3owHXGtkgBMrAcEA2+burPBoXvBSe3kXvpozikFm/wIEmHV45NhGFcl9BE04Zfeh2XlAQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Description

Final URL

https://www.diw.de/

HTTP status

206

HTTP

Status

HTTP/1.1 200 OK

Final URL

https://www.diw.de/

Version

Server

Apache

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Hellenic Academic and Research Institutions CA

diw.de

Valid from

2026-07-29T10:44:47-05:00

Valid until

2027-02-13T09:44:46-06:00

Days remaining

186

Protocol

TLSv1.3

Cipher

TLS_AES_256_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

195.90.218.113

263,75 ms

Cloudflare

1.1.1.1

195.90.218.113

318,55 ms

Quad9

9.9.9.9

195.90.218.113

168,86 ms

OpenDNS

208.67.222.222

195.90.218.113

500,69 ms

AdGuard

94.140.14.14

195.90.218.113

335,78 ms

IP, geolocation and ASNAssociated network information

195.90.218.113

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

diw-de.mail.protection.outlook.com

Port 25: Closed/unreachable - 36.8 ms - 
Port 465: Closed/unreachable - 4020.8 ms - 
Port 587: Closed/unreachable - 4045.7 ms -

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