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Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
87
GRADE
B
FIX
1
REVIEW
3
PASS
5
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
5 PASS 3 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.msdmanuals.com/
200https://msdmanuals.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://msdmanuals.com/ → https://msdmanuals.com:443/

Consistent

B
TLS Certificate Expiry & Recommendations
232 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

232
days left
0d 30d 60d 90d+

Recommended actions

  • Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
  • 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, 37 ms lookup
PASS
2 A records, 37 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 3.33.166.197, 166.117.53.172
Info::
No IPv6 (AAAA) records
Info::
8 nameserver(s) configured
Got: dns3.p03.nsone.net, ns04.msddns.com, ns03.msddns.com, ns01.msddns.com, dns2.p03.nsone.net, dns1.p03.nsone.net, ns02.msddns.com, dns4.p03.nsone.net
Info::
No MX records — email not configured via DNS
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: 37 ms
Got: 37 ms
A3.33.166.197, 166.117.53.172
AAAA—
CNAME—
NSdns3.p03.nsone.net, ns04.msddns.com, ns03.msddns.com, ns01.msddns.com, dns2.p03.nsone.net, dns1.p03.nsone.net, ns02.msddns.com, dns4.p03.nsone.net
MX—
TXT
ktmt32d3sngf5m9fggy14vj1jrry24dw
google-site-verification=fm_DC-mO5FrKVbZ057qlUM0JE-4Nv-WEDjbvHjMdzCI
google-site-verification=FGxdvx2_VP9u1TDuQZHhgNEbiR9BqrcPkhYpRJ_2i1s
SPF v=spf1 -all
lx5c2krwpbw8hr5sx6mwwlc1s060j5m0
google-site-verification=z3f91tBhNW1CHTQGJL1YFbkR982996VQ3Ez07cGUkgc
CAALookup not available with standard resolver
Resolved in 37 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
1 redirect(s), 532 ms total
PASS
1 redirect(s), 532 ms total
Info::
Single redirect
Got: https://msdmanuals.com → https://www.msdmanuals.com/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 532 ms total
Got: 532 ms

https://msdmanuals.com

417 ms · HTTP/1.1

301

https://www.msdmanuals.com/

116 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://msdmanuals.com301417 msHTTP/1.1WEBREDS
2https://www.msdmanuals.com/200116 msHTTP/1.1

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 25 URLs
PASS
robots.txt present, sitemap with 25 URLs
Info::
robots.txt is present
Got: 1752 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 25 entries
Info::
Sitemap index with 25 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1752 B Sitemaps referenced 16 User-agents Baiduspider, *, Googlebot-Image Blocking No — crawling allowed
User-agent: *

Crawl-delay: 5
Disallow: */sitecore/

Disallow: */Sitecore/

Disallow: */custom/

Disallow: */Custom/

Disallow: */news/external/

Disallow: */News/External/

Disallow: */pagerevalidation*

Disallow: */bigqueryexport*

Disallow: */downloadtextFile*

Disallow: */multimedia/zk/

Disallow: */Multimedia/zk/

Disallow: */multimedia/Zk/

Disallow: */Multimedia/Zk/

Disallow: */multimedia/ZK/

Disallow: */Multimedia/ZK/

Disallow: */professional/drug-names-generic-and-brand

Disallow: */home/drug-names-generic-and-brand

Disallow: */home/monograph/*

Disallow: */professional/monograph/*

Disallow: */home/drug-class-name

Disallow: /?*query*Visit*our*site 

Disallow: /?*query*Visit*our*website 

Disallow: /?*vip747  

Disallow: /?*dan-gol.com

User-agent: Googlebot-Image

Disallow: *blausen*

#Baiduspider

User-agent: Baiduspider

Disallow: /zh/


Sitemap: https://www.msdmanuals.com/de/sitemap.xml

Sitemap: https://www.msdmanuals.com/sitemap.xml

Sitemap: https://www.msdmanuals.com/es/sitemap.xml

Sitemap: https://www.msdmanuals.com/fr/sitemap.xml

Sitemap: https://www.msdmanuals.com/it/sitemap.xml

Sitemap: https://www.msdmanuals.com/ja-jp/sitemap.xml

Sitemap: https://www.msdmanuals.com/ko/sitemap.xml

Sitemap: https://www.msdmanuals.com/pt/sitemap.xml

Sitemap: https://www.msdmanuals.com/ru/sitemap.xml

Sitemap: https://www.msdmanuals.com/ru-ru/sitemap.xml

Sitemap: https://www.msdmanuals.com/ar/sitemap.xml

Sitemap: https://www.msdmanuals.com/vi/sitemap.xml

Sitemap: https://www.msdmanuals.com/uk/sitemap.xml

Sitemap: https://www.msdmanuals.com/hi/sitemap.xml

Sitemap: https://www.msdmanuals.com/sw/sitemap.xml

Sitemap: https://www.msdmanuals.com/id/sitemap.xml

User-agent: Googlebot-Image

Disallow: *blausen*
sitemap.xml 200 OK
Type Sitemap Index URLs 25 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
msdmanuals.com — via MarkMonitor Inc., 12 years, 1 months old, hosted on AWS
PASS
msdmanuals.com — via MarkMonitor Inc., 12 years, 1 months old, hosted on AWS
Info::
Domain registered until May 19, 2028 (2 years, 1 months remaining)
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: MarkMonitor 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.
Info::
Hosting: AWS
Got: AS16509
Domain expiry

706 days

May 19, 2028

SSL certificate

232 days

Issued by Sectigo Limited

Domain age

12 years, 1 months

Registered May 19, 2014

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

3.33.166.197

Registrar

MarkMonitor Inc.

Unlocked 8 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar MarkMonitor Inc.
Created May 19, 2014 (12 years, 1 months ago)
Expires May 19, 2028 (2 years, 1 months)
Last Updated April 17, 2026
Name Servers dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net, ns01.msddns.com, ns02.msddns.com, ns03.msddns.com, ns04.msddns.com
DNSSEC Not enabled
Hosting
IP Address 3.33.166.197
ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)
Provider AWS
Data source: rdap (0.4s)

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 461 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
36 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.
308 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
461 ms
Total Time Total request time from DNS lookup through full response.
461 ms

Connection waterfall

DNS Lookup 36 ms TCP Connect 1 ms TLS Handshake 308 ms Server Processing 116 ms Content Transfer 0 ms
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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