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https://slideshare.net

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
87
GRADE
B
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Singapore, Singapore
301 Moved Permanently
Checks
9
6 PASS 3 REVIEW
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.slideshare.net/
200https://slideshare.net/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://slideshare.net/ → https://slideshare.net/

Consistent

B
TLS Certificate Expiry & Recommendations
53 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

53
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
4 A records, 44 ms lookup
PASS
4 A records, 44 ms lookup
Info::
Resolves to 4 IPv4 address(es)
Got: 151.101.2.152, 151.101.130.152, 151.101.194.152, 151.101.66.152
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1225.awsdns-25.org, ns-1650.awsdns-14.co.uk, ns-178.awsdns-22.com, ns-802.awsdns-36.net
Info::
1 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: 44 ms
Got: 44 ms
A151.101.2.152, 151.101.130.152, 151.101.194.152, 151.101.66.152
AAAA—
CNAME—
NSns-1225.awsdns-25.org, ns-1650.awsdns-14.co.uk, ns-178.awsdns-22.com, ns-802.awsdns-36.net
MX
1 smtp.google.com
TXT
0b2ca37a856d424fa0188c4908cacf6c
533115289-1138720
google-site-verification=GMw4f3bXpsJI74PMG4IBfWz1w3_DUsvriSlEjKbXyKo
google-site-verification=Q5_zzFNm5OGFcyL3lnV44cVoJjo6KbEH3PeIKcg9mGU
google-site-verification=z0MToYwj_eTkwEHlRGUDGpmnY2kWd92EL11Wn8bw2t0
SPF v=spf1 ip4:34.216.216.60 ip4:34.216.216.61 ip4:52.39.56.161 ip4:52.43.64.76 ip4...
CAALookup not available with standard resolver
Resolved in 44 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), 825 ms total
PASS
1 redirect(s), 825 ms total
Info::
Single redirect
Got: https://slideshare.net → https://www.slideshare.net/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 825 ms total
Got: 825 ms

https://slideshare.net

324 ms · HTTP/1.1

301

https://www.slideshare.net/

501 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://slideshare.net301324 msHTTP/1.1envoy
2https://www.slideshare.net/200501 msHTTP/1.1envoy

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 480 URLs
PASS
robots.txt present, sitemap with 480 URLs
Info::
robots.txt is present
Got: 1443 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 480 entries
Info::
Sitemap index with 480 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1443 B Sitemaps referenced 1 User-agents archive.org_bot, ClaudeBot, Diffbot, omgili, AI2Bot, *, Archive-It, Bytespider, CCBot, Claude-Web, ImagesiftBot Blocking No — crawling allowed
User-agent: *
Disallow: /~/
Disallow: /index.html
Disallow: /slideshow/*/lead-form
Disallow: /*/leads/*/show_form.html
Disallow: /*/leads/*/jsplayer_show_lead_form.html
Disallow: /*/followers$
Disallow: /*/followers/
Disallow: /*/following$
Disallow: /*/following/
Disallow: /business/leads/show_form.html
Disallow: /business/leads/jsplayer_show_lead_form.html
Disallow: /account/
Disallow: /api/
Disallow: /business/premium/is_payment_pending
Disallow: /business/adshare
Disallow: /business/feedback
Disallow: /business/promotion
Disallow: /business/adshare/faqs
Disallow: /comment/
Disallow: /community/
Disallow: /event/
Disallow: /favorite/
Disallow: /group/
Disallow: /ia/
Disallow: /main/
Disallow: /pingback/
Disallow: /rss/
Disallow: /search/
Disallow: /search?
Disallow: /share/
Disallow: /slideshow/embed_code/
Disallow: /uploads/
Disallow: /nextjs/
Disallow: */favorites_list/*
Disallow: /ab_tests
Disallow: /frontend-track/
Disallow: /fullscreen/ReportLinker/
Disallow: /private/
Disallow: /language?
Disallow: /mobile/

User-agent: archive.org_bot
Disallow: /w/*

User-agent: Archive-It
Disallow: /w/*

User-agent: Bytespider
Disallow: /

User-agent: CCBot
Disallow: /

User-agent: Claude-Web
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: Diffbot
Disallow: /

User-agent: ImagesiftBot
Disallow: /

User-agent: omgili
Disallow: /

User-agent: AI2Bot
Disallow: /


Sitemap: https://sitemaps.slideshare.net/sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 480 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
slideshare.net — via Amazon Registrar, Inc., 20 years, 3 months old, hosted on Fastly
PASS
slideshare.net — via Amazon Registrar, Inc., 20 years, 3 months old, hosted on Fastly
Info::
Domain registered until Apr 4, 2027 (11 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: 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.
Info::
Hosting: Fastly
Got: AS54113
Domain expiry

265 days

April 4, 2027

SSL certificate

53 days

Issued by Let's Encrypt

Domain age

20 years, 3 months

Registered April 4, 2006

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Fastly

ASN AS54113

151.101.66.152

Registrar

Amazon Registrar, Inc.

Unlocked 4 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 Amazon Registrar, Inc.
Created April 4, 2006 (20 years, 3 months ago)
Expires April 4, 2027 (11 months)
Last Updated February 28, 2026
Name Servers ns-1225.awsdns-25.org, ns-1650.awsdns-14.co.uk, ns-178.awsdns-22.com, ns-802.awsdns-36.net
DNSSEC Not enabled
Hosting
IP Address 151.101.66.152
ASN AS54113 (FASTLY - Fastly, Inc., US)
Provider Fastly
Data source: rdap (0.5s)

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 296 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
37 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.
4 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
296 ms
Total Time Total request time from DNS lookup through full response.
296 ms

Connection waterfall

DNS Lookup 37 ms TCP Connect 1 ms TLS Handshake 4 ms Server Processing 255 ms Content Transfer 0 ms
A
CDN & Delivery
Fastly (MISS, MISS)
PASS
Fastly (MISS, MISS)
Info::
Site is served via Fastly CDN
Got: x-served-by: cache-sin-wsat1880048-SIN, cache-sin-wsat1880046-SIN
Info::
CDN cache status: MISS, MISS
CDN Detected: Fastly
Provider Fastly Cache Status MISS, MISS Evidence x-served-by: cache-sin-wsat1880048-SIN, cache-sin-wsat1880046-SIN
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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