DNS Gurus

SSL Verification Bypassed

The server's SSL certificate could not be verified. The analysis was completed using insecure mode. Data may be less reliable.

Reason:

Hostname Mismatch - certificate is issued for a248.e.akamai.net, *.akamaized.net, *.akamaized-staging.net, *.akamaihd.net, *.akamaihd-staging.net, not for grouponworks.jp

Cached · just now
26 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=2628000
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Content-Type-Options: nosniff
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

3 headers
Connection
Performance
Transfer-Encoding
Transfer-Encoding
Performance
chunked
Vary
Performance
Accept-Encoding, User-Agent

Caching Headers

1 headers
Cache-Control
Caching
private, max-age=0, no-cache, no-store, must-revalidate

Content Headers

1 headers
Content-Type
Content
text/html; charset=utf-8

Server Headers

1 headers
X-Powered-By
Server
Express

CORS Headers

0 headers
No CORS headers found

Cookies Headers

1 headers
Set-Cookie
Cookies
bm_sz=3E47B1D94BED07ECE1F1738AA19D17F9~YAAQU2rcF3fhHvabAQAAWlbK/R7wkgAPCU4m4fMzpI5lE8vBolyR6m+xm/6PnLHWVej9KpA9rshoUXE6z4THxuJluJBH1oqm65Kj884KGw178mEV0+K/Zp8fy58MMSY/bs9Akiw1NlTYEsnuZdIEggpt0WfsCYEmqymoCDP0doJpMH6/5uGTScx8pFNO0ltdhs8MtsRWbxB7RAfJr8ka2DT9ho4lSTt+7roVCPlPifaxkeq0abzJq0aLbsq2ohAbvnYStZSwi0bjyq9rsWucXXrmPBoHlP/8VGFsKFCIOTZPdNPZZn5k58h2bJnFhR452/zs0RFXFEWngh6tob0oFjCTnqZ5Wkn5GQ273462~4601666~3420484; Domain=.groupon.jp; Path=/; Expires=Tue, 27 Jan 2026 08:50:54 GMT; Max-Age=14400

Other Headers

17 headers
Date
Other
Tue, 27 Jan 2026 04:50:54 GMT
Server-Timing
Other
rReq;dur=283, rCon;dur=0, rHdr;dur=283, hbi;dur=274
X-Akamai-Transformed
Other
0 - 0 -
X-B-Cookie
Other
43d6cf48-6747-4d4a-96cf-486747ad4a41
X-B3-Traceid
Other
168cd84aeac54bbd87eea17bb2dd7910
X-Destination
Other
tls_conveyor_customer_support_itier
X-Envoy-Upstream-Service-Time
Other
284
X-External-Request-Id
Other
true
X-Forwarded-Proto
Other
https
X-Mtls-Upstream-Time
Other
274
X-Original-Request-Id
Other
168cd84a-eac5-4bbd-87ee-a17bb2dd7910
X-Request-Id
Other
168cd84a-eac5-4bbd-87ee-a17bb2dd7910,168cd84a-eac5-4bbd-87ee-a17bb2dd7910
X-Request-Originated-From
Other
envoy-tls-side-car--ingress-https
X-Response-Served-From
Other
routing-service--public--eu-west-1--conveyor-production49
X-S-Cookie
Other
4047ff1f-3699-4c06-87ff-1f3699ac0621
X-Signifyd-Cookie
Other
210ddf13-cef8-420c-8ddf-13cef8b20c0e
X-Ua-Compatible
Other
IE=edge,chrome=1

Recommendations

Enable compression (gzip/brotli) to improve performance

Consider removing X-Powered-By header to hide server technology