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https://medium.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
98
GRADE
A+
FIX
0
REVIEW
1
PASS
8
INFO
0
Probed from Sao Paulo, Brazil
200 OK
Checks
9
8 PASS 1 REVIEW
B
TLS Certificate Expiry & Recommendations
55 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

55
days left
0d 30d 60d 90d+

Recommended actions

  • Submit your domain to hstspreload.org to be added to the Chrome preload list
  • Enable DNSSEC on your domain for DNS spoofing protection
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
2 A records, 5 ms lookup
PASS
2 A records, 5 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 162.159.153.4, 162.159.152.4
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2606:4700:7::a29f:9804, 2606:4700:7::a29f:9904
Info::
2 nameserver(s) configured
Got: alina.ns.cloudflare.com, kip.ns.cloudflare.com
Info::
5 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 5 ms
Got: 5 ms
A162.159.153.4, 162.159.152.4
AAAA2606:4700:7::a29f:9804, 2606:4700:7::a29f:9904
CNAME—
NSalina.ns.cloudflare.com, kip.ns.cloudflare.com
MX
1 aspmx.l.google.com
5 alt2.aspmx.l.google.com
5 alt1.aspmx.l.google.com
10 aspmx2.googlemail.com
10 aspmx3.googlemail.com
TXT
07ecf60c9da442a9b3bcce99190ff60a
Domain Verification for Digicert (10/05/2022)y7ncgbyk39tw482zsbwcnfx0t775d85j
anthropic-domain-verification-p32bnn=TlzaDtedEYyM5ccLdU8NsQIPP
apple-domain-verification=Ls6JkesM8aOd8xyQ
cursor-domain-verification-54pwxn=8yHL5J3FELu0JwETv8iGeZt4A
dropbox-domain-verification=d7wsnlvbz6l3
facebook-domain-verification=eqviiajbkkhum35vciytgngt69oan0
google-site-verification=QuRrrbvTtvFC0uq2BLr_CcuuuDEiNGDJjI7XkPV3s60
google-site-verification=TUaeSBwTARWW1ntR_TLK0FwD5WKnFCpB5gYVuXkBmlg
google-site-verification=jUulFqySbosf7Fvi1pvOm1KL3AeQ5L5s18CDIU30xek
google-site-verification=nlPBDLGxOufYa5DdXnQ8d28h5dJjwy0bSakZq-tSios
linear-domain-verification=tyjcyfd4thj2
notion-domain-verification=FPUVTTLhldYnVqE4496kGbBhDpf54Y4O7eA8SxkbAHk
openai-domain-verification=dv-G8sPcKCsIq9tKkWTNFJZh3RE
SPF v=spf1 include:amazonses.com include:_spf.google.com include:mail.zendesk.com in...
CAALookup not available with standard resolver
Resolved in 5 ms

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://medium.com

https://medium.com

44 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://medium.com20044 msHTTP/1.1cloudflare
A+
IPv6 Readiness
IPv6 reachable (2 ms)
PASS
IPv6 reachable (2 ms)
Info::
IPv6 is configured and reachable at 2606:4700:7::a29f:9804, 2606:4700:7::a29f:9904
Got: 2 ms connect
IPv6 Ready
AAAA Records 2606:4700:7::a29f:9804, 2606:4700:7::a29f:9904 Connection Reachable (2 ms)
A+
Crawlability
robots.txt present, sitemap with 27518 URLs
PASS
robots.txt present, sitemap with 27518 URLs
Info::
robots.txt is present
Got: 884 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 27518 entries
Info::
Sitemap index with 27518 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 884 B Sitemaps referenced 1 User-agents Amazonbot, FacebookBot, GoogleOther, GPTBot, meta-externalagent, *, Applebot-Extended, Bytespider, ClaudeBot Blocking No — crawling allowed
User-Agent: *
Disallow: /m/
Disallow: /me/
Disallow: /@me$
Disallow: /@me/
Disallow: /*/edit$
Disallow: /*/*/edit$
Disallow: /media/
Disallow: /p/*/share
Disallow: /r/
Disallow: /trending
Disallow: /search?q$
Disallow: /search?q=
Disallow: /*/search?q=
Disallow: /*/search/*?q=
Disallow: /*/*source=
Allow: /_/api/users/*/meta
Allow: /_/api/users/*/profile/stream
Allow: /_/api/posts/*/responses
Allow: /_/api/posts/*/responsesStream
Allow: /_/api/posts/*/related
User-Agent: Amazonbot
User-Agent: Applebot-Extended
User-Agent: Bytespider
User-Agent: ClaudeBot
User-Agent: FacebookBot
User-Agent: GoogleOther
User-Agent: GPTBot
User-Agent: meta-externalagent
Disallow: /
Allow: /about
Allow: /business
Allow: /earn
Allow: /gift
Allow: /membership
Allow: /partner-program
Allow: /verified-authors
Sitemap: https://medium.com/sitemap/sitemap.xml
License: https://medium.com/license.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 27518 entries Valid XML Yes
Child Sitemaps:
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

301https://www.medium.com/
200https://medium.com/

Preferred variant: non-www

HTTP → HTTPS

301http://medium.com/ → https://medium.com/

Consistent

A
Domain Intelligence
medium.com — via Amazon Registrar, Inc., 28 years, 3 months old
PASS
medium.com — via Amazon Registrar, Inc., 28 years, 3 months old
Warning::
Domain expires in 39 days
Consider enabling auto-renewal to prevent accidental expiration.
Got: Expires May 26, 2026
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: Amazon Registrar, Inc.
Warning::
Registrar lock is NOT enabled
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Domain expiry

EXPIRED

May 26, 2026

SSL certificate

55 days

Issued by Google Trust Services

Domain age

28 years, 3 months

Registered May 27, 1998

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2606:4700:7::a29f:9804

Registrar

Amazon Registrar, Inc.

Unlocked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Domain has EXPIRED — renew immediately to avoid total site outage
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar Amazon Registrar, Inc.
Created May 27, 1998 (28 years, 3 months ago)
Expires May 26, 2026 (1 months)
Last Updated April 21, 2025
Name Servers alina.ns.cloudflare.com, kip.ns.cloudflare.com
DNSSEC Not enabled
Hosting
IP Address 2606:4700:7::a29f:9804
Data source: rdap (0.4s)

Consider enabling auto-renewal to prevent accidental expiration.

Why this matters

Domain expiry approaching — renew immediately and ensure auto-renew + alerting are configured.

Source: ICANN renewal policy

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 43 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
3 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
1 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
7 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
43 ms
Total Time Total request time from DNS lookup through full response.
44 ms

Connection waterfall

DNS Lookup 3 ms TCP Connect 1 ms TLS Handshake 7 ms Server Processing 32 ms Content Transfer 1 ms
A+
CDN & Delivery
Cloudflare (HIT)
PASS
Cloudflare (HIT)
Info::
Site is served via Cloudflare CDN (edge: GRU)
Got: cf-ray: 9ed4cc013aa9f3bf-GRU
Info::
CDN cache status: HIT
CDN Detected: Cloudflare
Provider Cloudflare Cache Status HIT Evidence cf-ray: 9ed4cc013aa9f3bf-GRU
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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