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75
Total
60
DNS
90
Email
73
Security
35
Network
100
Availability
Domainschneier.com
IPv42
IPv60
MX records2
StatusActive
Domain technical report

Schneier on Security -

schneier.com

Generated: 2026-08-08T23:15:29-05:00 · Cached result

JSONCSVPDFVisit site
IPv42
IPv60
MX2
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 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 record0 / 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

2 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

36 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers8 / 35 pts · Security

2 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

✓
IPv4 diversity35 / 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

2 record(s)
199.16.173.239
199.16.172.203

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

2 record(s)
10 mx1.emailsrvr.com.
20 mx2.emailsrvr.com.

TXT

1 record(s)
"v=spf1 a include:emailsrvr.com include:servers.mcsv.net ip4:204.11.247.92 ip4:204.11.247.93 ?include:netblocks.dreamhost.com ?include:spf.modwest.com ~all"

NS

2 record(s)
ns79.worldnic.com.
ns80.worldnic.com.

SOA

0 record(s)
—

Not configured

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 a include:emailsrvr.com include:servers.mcsv.net ip4:204.11.247.92 ip4:204.11.247.93 ?include:netblocks.dreamhost.com ?include:spf.modwest.com ~all

DMARC

Configured
v=DMARC1; p=none; ruf=mailto:dmarc24@schneier.com;fo=0

DKIM

Selector k1
k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDbNrX2cY/GUKIFx2G/1I00ftdAj713WP9AQ1xir85i89sA2guU0ta4UX1Xzm06XIU6iBP41VwmPwBGRNofhBVR+e6WHUoNyIR4Bn84LVcfZE20rmDeXQblIupNWBqLXM1Q+VieI/eZu/7k9/vOkLSaQQdml4Cv8lb3PcnluMVIhQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Schneier on Security -
Description
Final URL
https://www.schneier.com/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.schneier.com/
Version
3
Server
nginx
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Google Trust Services
CN
tls.automattic.com
Valid from
2026-06-16T06:07:02-05:00
Valid until
2026-09-14T06:07:01-05:00
Days remaining
36
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

2 active
✓
HSTSImplemented
—
Content Security PolicyNot detected
—
X-Content-Type-OptionsNot detected
—
X-Frame-OptionsNot detected
—
Referrer PolicyNot detected
✓
Permissions PolicyImplemented
—
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
199.16.172.203, 199.16.173.239
35,41 ms
Cloudflare
1.1.1.1
199.16.172.203, 199.16.173.239
61,21 ms
Quad9
9.9.9.9
199.16.172.203, 199.16.173.239
87,73 ms
OpenDNS
208.67.222.222
199.16.172.203, 199.16.173.239
95,18 ms
AdGuard
94.140.14.14
199.16.172.203, 199.16.173.239
114,72 ms

IP, geolocation and ASNAssociated network information

199.16.173.239

No data
success
No
country
region
city
asn
organization
isp

199.16.172.203

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

mx1.emailsrvr.com

Port 25: Closed/unreachable - 8.1 ms - 
Port 465: Closed/unreachable - 15.5 ms - 
Port 587: Closed/unreachable - 15.6 ms -

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