https://gsk.com
Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.SCORE
95
GRADE
A
FIX
1
REVIEW
2
PASS
6
INFO
0
Probed from Sao Paulo, Brazil
301 Moved Permanently
Checks
96 PASS 2 REVIEW 1 FIX
DCDN & DeliveryActionNo CDN detectedFIX
CDN & Delivery
ActionNo CDN detected
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.
BRedirect Chain2 redirect(s), 508 ms totalREVIEW
Redirect Chain
2 redirect(s), 508 ms total
2 redirect(s), 508 ms total
Warning::
2 redirects before reaching final URL
Each redirect adds latency. Try to minimize the chain to 1 hop.
Info::
WWW normalization redirect
Info::
Redirect overhead: 508 ms total
Got: 508 ms
https://gsk.com
145 ms · HTTP/1.1
301
https://gsk.com/en-gb/
204 ms · HTTP/1.1
301
https://www.gsk.com:443/en-gb/
160 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://gsk.com | 301 | 145 ms | HTTP/1.1 | |
| 2 | https://gsk.com/en-gb/ | 301 | 204 ms | HTTP/1.1 | |
| 3 | https://www.gsk.com:443/en-gb/ | 200 | 160 ms | HTTP/1.1 |
See the visual redirect chain in the HTTP Probe tab →
Each redirect adds latency. Try to minimize the chain to 1 hop.
Why this matters
Redirect chain — each hop adds latency; combine into one redirect where possible.
Source: Google Search Central / web.dev
BTLS Certificate Expiry & Recommendations70 days until leaf cert expires — 4 issues to addressREVIEW
TLS Certificate Expiry & Recommendations
70 days until leaf cert expires — 4 issues to address
Certificate validity
70
days left
0d 30d 60d 90d+
Recommended actions
- Add includeSubDomains to the HSTS directive
- Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
- 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 Records2 A records, 126 ms lookupPASS
DNS Records
2 A records, 126 ms lookup
2 A records, 126 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 2.16.169.14, 2.16.169.18
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2600:1419:6200:3d::214:8b53, 2600:1419:6200:3d::214:8b51
Info::
2 nameserver(s) configured
Got: c1-160.akashield.net, c2-160.akashield.net
Info::
2 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: 126 ms
Got: 126 ms
| A | 2.16.169.14, 2.16.169.18 |
| AAAA | 2600:1419:6200:3d::214:8b53, 2600:1419:6200:3d::214:8b51 |
| CNAME | — |
| NS | c1-160.akashield.net, c2-160.akashield.net |
| MX | 5 mxa-001caa02.gslb.pphosted.com 5 mxb-001caa02.gslb.pphosted.com |
| TXT | /ZT+19PNJ/2m3OQQlu/JW4YRjiI= 43d3babd-5196-4168-82bf-ad91a5460a20 46314549aa271bd52a60e6c394471398a7daba94195caf7c0ad1a7fc747a8313 MS=ms52422680 ZOOM_verify_GmYSH5N2SsSVd5IiskLTtg _globalsign-domain-verification=YAlUiOIcLf2w_4JBXYS-cgwWWBpQPjQC4wL5YxrnTH _j8pkvojn5dc74oqpp4isjqzls4l1jlx adobe-idp-site-verification=1a542705d103b1b61fef7cfa8faae55aa98921c853154e0e5524... airtable-verification=f0f7584a3a686e37af7211c43ba80d06 amazonses:R/oqH7QHdio+vXCeQ6jzKFaT8654S73t569K6CKZs6I= anthropic-domain-verification-k4tnng=zZTIxB16agkNmVIynUVdECy7H apple-domain-verification=hE2oLHsSZHDdGLLE atlassian-domain-verification=l1Z8BYztMb8MijiuI8UIBmNYx3R9I8ZLs84apb6rXv/QCjpr4Y... atlassian-domain-verification=zdxihZXuWCS1onHmba6zHTL4mBi4q/6ec87WKUqW3bipKbmXHA... bd52c1f6be714d6ebc2a9c139597fe3a box-domain-verification=470291b1b8c20979f609467654e79c9e0238084b7fd6b133ead14488... box-domain-verification=928a3c1f9c024a2c53599a76d1045f9c46e2b0f896e5939a970fdc29... docker-verification=1396de14-7a6f-4a3d-b579-429042390261 extensis-domain-verification=aeb8a89b-268d-4d38-9724-cac550902cec facebook-domain-verification=fepox61pkp4llceghsrvo9wbdu50y3 facebook-domain-verification=s79fy8b705prth71j83ojr4yo7aahi facebook-domain-verification=xjk0szosgc4rjzr6q5tg7ct1qxv8ak gather-domain-verification=35662fc1-bcee-40a4-b7e1-42ecc944dc65 geneious.com:domain-verification=RDoSynWkKF7jSLjPkr8rHA google-site-verification=FcHW0uDF1wXynfK2g0JiKiHeIp5V96mJk-N0B8U5cuc google-site-verification=FpGtSQEL_7Dqynv0zkgWaWJrMCRgrocNGlG7iq8jyoE google-site-verification=RlJMNPbIJ3Qtx4t7sCrH7PeIRUcPio023L6RYPAbaBQ google-site-verification=Vo27n252DXp-qk_WuYlze_OCpQvgKAmdkpQ9pDZWKB4 google-site-verification=YJ3eiJWiETpqftuQRJbOWrNfbD6JeVZXcZzpITiNuFs google-site-verification=ZBRZsdsDYNKflXclgkWWMbWhxI6XxkcLmDnmxc1D6aE google-site-verification=vA092sTjMxEH8IFhOFZ8XAigFW3zrAZZhczejf6CPpw jamf-site-verification=p5wItSf-yJKparCJGipkMw lovable_verification=workspace_01kazp6p0je1crjnff3jnax7sw onetrust-domain-verification=4eb96f2474644460a5a09efee893f232 paloaltonetworks-site-verification=1bac94d7d45734bcd190306e3c54fe2701c5639884f8d... rhxplhd6jgwjqy4wty65v0h1swtqhnzt scq9sj3hqecv1t2dqckdtd20bg smartsheet-site-validation=0cQRK_ZUMaO-1J0URmGVc_ql0hS6q4Sk smartsheet-site-validation=4mq3K_8LjJ59cQI_a0GNX5SHj6dWumec smartsheet-site-validation=foYOl-7T6FYOs-xlxgc1u_FuLjFIX9vc smartsheet-site-validation=ogQOvGH4Rs8ENz08bTpkM6RowzmrIgBS smartsheet-site-validation=sbiSUBaozvUVWD-AQ4DS9Amgye1KJkgl successfactors-site-verification=ZWJjNzc1NDgwNTVhMDFiNzc1ZmEzNGU3NzRiNTRiMmJhMGY... twilio-domain-verification=66002f7976ba22a0e3a7a8d201f6c81f v=DKIM1; g=*; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkNFyczmsiaWv1ohSXj... v=DKIM1; g=*; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDl3Ju9fsWggJqzUZfaE... SPF v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all webexdomainverification.18AD=02d4c8a4-b214-447d-bcdb-51f7fe1e79d0 wiz-domain-verification=ec1bffcb8450b6792c1ccded256b4c098d169793814b908c22fbbbd9... workplace-domain-verification=z80XR6wn7ggP8MBuUTWbCupWiou1uy |
| CAA | Lookup not available with standard resolver |
Resolved in 126 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+IPv6 ReadinessIPv6 reachable (1 ms)PASS
IPv6 Readiness
IPv6 reachable (1 ms)
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2600:1419:6200:3d::214:8b53, 2600:1419:6200:3d::214:8b51
Got: 1 ms connect
IPv6 Ready
AAAA Records 2600:1419:6200:3d::214:8b53, 2600:1419:6200:3d::214:8b51 Connection Reachable (1 ms)
A+Crawlabilityrobots.txt present, sitemap with 2004 URLsPASS
Crawlability
robots.txt present, sitemap with 2004 URLs
robots.txt present, sitemap with 2004 URLs
Info::
robots.txt is present
Got: 81 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 2004 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 81 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *
Allow: /
Disallow: /search
Sitemap: https://www.gsk.com/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 2004 entries Valid XML Yes
Sample URLs:
- https://www.gsk.com/en-gb/
- https://www.gsk.com/en-gb/behind-the-science-magazine/
- https://www.gsk.com/en-gb/behind-the-science-magazine/combining-genetics-and-tech-to-double-success-rates/
- https://www.gsk.com/en-gb/behind-the-science-magazine/getting-ahead-of-infectious-diseases-with-advanced-technology/
- https://www.gsk.com/en-gb/behind-the-science-magazine/could-tiny-bubbles-released-from-bacteria-cells-pave-the-way-for-new-vaccine-technology/
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
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.gsk.com/
200https://gsk.com/
Preferred variant: non-www
HTTP → HTTPS
301http://gsk.com/ → https://gsk.com/
Consistent
A+Domain Intelligencegsk.com — via SafeNames Ltd., 28 years, 1 months oldPASS
Domain Intelligence
gsk.com — via SafeNames Ltd., 28 years, 1 months old
gsk.com — via SafeNames Ltd., 28 years, 1 months old
Info::
Domain registered until Aug 6, 2026 (3 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: SafeNames Ltd.
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
20 days
August 6, 2026
SSL certificate
70 days
Issued by Let's Encrypt
Domain age
28 years, 1 months
Registered August 7, 1998
DNSSEC
Not enabled
Protects against DNS spoofing
Hosting
Unknown
2600:1419:6200:3d::214:8b51
Registrar
SafeNames Ltd.
Unlocked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
- Renew the domain or enable auto-renewal to prevent accidental expiry
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar SafeNames Ltd.
Created August 7, 1998 (28 years, 1 months ago)
Expires August 6, 2026 (3 months)
Last Updated August 6, 2025
Name Servers c1-160.akashield.net, c2-160.akashield.net
DNSSEC Not enabled
Hosting
IP Address 2600:1419:6200:3d::214:8b51
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 TimingTotal 221 ms — DNS, TCP, TLS, TTFB, content transfer breakdownPASS
HTTP Probe Timing
Total 221 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
54 msTCP Connect TCP Connect — time to establish a TCP connection to the server.
0 msTLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
14 msTime to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
222 msTotal Time Total request time from DNS lookup through full response.
222 msConnection waterfall
DNS Lookup 54 ms TCP Connect 0 ms TLS Handshake 14 ms Server Processing 153 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.